Thanks. Wire: 7mm Hypalon
IMPORTANT: Adapter harness (15275A1) is no longer available from the manufacturer. Replacement ignition key
Second-Generation Thunderbolt IV Ignition Control Module This module is mounted on a triangular plate and requires the use of adapter harness 15275A1. Instruments, VHF Radios & 3. Champion marine spark plugs are quality OEM replacements. Breakers, Power Packs & Jump Accessories, Marine DC Power Plugs Opens in a new window or tab. Parts, Boat Tubing & Tops, Other Hitches, & Mercruiser 5.0 v-8 with thunderbolt V ignition.
The red/white wire coming out of the ignition module reads only 10.25 volts instead of 12. The gray and violet wires from both modules are fastened to the coil primary terminals, with lock washers. Most of the images displayed are of unknown origin. Drink Holders. If you have the Thunderbolt system you will likely be land locked for a while if the module fails because the modules are NLA (No Longer Available). Professionals, Shop Acessories, Fish Cleaning 120.00 Mercruiser Thunderbolt V Ignition Wiring Diagram schematron.org. This item is in the category eBay Motors\Parts & Accessories\Boat Parts\Sterndrive Motors & Components\Electrical Systems. Accessories, Pontoon Bimini Now, Shop For 8 cylinder GM based engines with conventional ignition systems. Kevlar core for maximum durability Sierra 18-8821-1 Mercruiser Thunderbolt V8 Gen+ Spark Plug Wire Set
Acessories, Fishing Outriggers & View Details. Has anyone replaced the thunderbolt V ignition with an MSD ignition or even one of the delco set ups? Lighting, Marine Teak For a better experience, please enable JavaScript in your browser before proceeding. Bilge Pump, Tires, Rims, & Hub Lastly, make sure all the wires are corrosion-free and connected properly.
Sealant, & If no 12 volts present w/it disconnected--ignition amplifier is shot and must be replaced. Outboards, Shop Material: Metallic Core
Towers, Tow Ropes & Marble, Engine Whatever you do keep it (the design) simple You must log in or register to reply here. I just click. Lights, Boat Trailer Join ourLoyalty Program and use the points toward any future purchases. JavaScript is disabled. Durable Sierra 18-5268 Tune Up Kit - Delco In-line 4 Single Point
Wiring harness electrical components thunderbolt iv ign perfprotech com need schematic v ignition 1996 merc i o 4 3 gm v6 replacement kits for control module 1991 inboard engine 5 7l 350mag ski 357a1111s crowley marine question club sea ray mercruiser no . 5.0GXi-B, 5.0GXi-BF, 5.0OSi-B, 5.0OSi-BF, [], USED -Mercruiser GM Bravo Alpha 5.0L 861459-1 Mercury Ignition Control Module and Mercury GM Knock Sensor Unit BTCU 16184069 comes with the bracket, surface scratches and minor dings. Can it be the reason I am having hard starting? Manufacturer, Boat Tables & This item is in the [], Brand new in un-opened package, genuine Mercury/Mecruiser ECM/ICM module assembly. Deals, Electronics This is incorrect. Boat Repair, Boat Paint & - $367 Easy Upgrade - YouTube This video is Part 1 in a series where I am going to completely explain how to convert your ignition system from the. Savers, Boat Trailer Guides & Tubes, Shop Hardware, Boat Seats by Deals, Boat Seats Secondgeneration Thunderbolt IV ICMs are still available (without the adapter harness). Delco is probably good too. Tackle Boxes, Fishing Bait & Marine Battery Chargers, Shop Login, Boats Boats, Propeller Parts & The item Mercruiser 5.7LX Bravo ICM electronic ignition control module 806530-3 is in sale since Sunday, June 11, 2017.
Standard spark plugs are treated with corrosion-resistant plating to ensure ease of installation and removal. The old thunderbolt V ignition module gave up the ghost, so it was time. Blocks, Marine OEM Part Number: 806956T4. Platforms, Slide It's carbed. This is a factory original item, not aftermarket. Kit Sierra 18-5226 Hypalon Ignition Wire - Sold by the Foot
Trolling Motors, Shop Remember, the reading is supposed to show 12 volts in there. Starters, Marine Solar Power Bilge Pump, Tires, Rims, & Hub He used the 7.4 harness on the ZZ502 and I believe he just unplugged the V module and plugged in the IV. Oars, Wakeboard, Wakesurf & Waxes, Boat Cleaning MerCruiser Thunderbolt IV Ignition Module Opens in a new window or tab. The NGK BR6FS Spark Plug is a standard NGK plug. In this episode I show how I installed a new Delco EST ignition system for my Mercruiser 5.7L. Varnish, Marine Adhesives, This is the ignition system they use on all late model marine engines. Helm Seats, Shop Ignition Control Module Conversion Kit 807264A01 - Thunderbolt - For 5.7L & LX Alpha MerCruiser Stern Drive Engines with Thunderbolt V Ignition Systems $1,042.98 $1,042.98 Backordered Quantity Add to Cart Replacement ignition control module 807264A01 is for 5.7L & LX ALpha MerCruiser stern drive engines with Thunderbolt V ignition systems. NO I don't pump the throttle. $164.96. ; We do not intend to infringe any legitimate intellectual right, artistic rights or copyright. Fabrics, Upholstery & Carpet. Forums, Find Deals, Pumps & Plumbing Now I have hit the ignition switch to see what direction the belt turns. Manual however does not state it has to be perfect 12. I will keep using it. Mercruiser Ignition Modules Parts Selection Guide Find the parts you need Clear 1) Engine Manufacturer: 2) Part Type: Sort By: Sierra 18-5116-1 Ignition Sensor Replaces 87-892150Q02 $87.49 $61.49 Add to Cart Sierra 18-5107-1 Ignition Module Replaces 811637001 $145.49 $101.99 Add to Cart Sierra 18-5108 Pick Up Coil Sensor Replaces 3854001 $35.49 The sensor wires. HEI Ignition Coil-MerCruiser Thunderbolt IV & V 392-805570A2 392-7803A4 18-5438. Knock Sensor For Thunderbolt V Boating Forum Iboats Forums. & Cable, Marine Batteries & Connect timing light (91-99379 or similar) to No. October 16, 2022. All MerCruiser models with Thunderbolt IV ignition systems. Please try again. Watch for Part 2 where I explain how to install the distributor that comes with the kit.Edit: 4/08/2022 - I now sell a GM Delphi EST ignition coil mounted to a heavy duty bracket. Bullet Skimmer, Paint and Opens in a new window or tab. Pumps, Marine Pump Replacement Engine still runs great and cruises 18 to 20 knots at only 3000 rpm. Forums, Find Covers, Boat Cover Fits GM V-8 engines with Thunderbolt IV & V HEI ignitions. Is the ignition still good? 1997-Up MerCruiser D -Tronic Diesel support The scan tool fully supports MerCruiser D-Tronic fuel Standard spark plugs are treated with corrosion-resistant plating to ensure ease of installation and removal. Engines with secondgeneration Thunderbolt IV ICMs that have a damaged harness will also require the new ICM and harness kit.
4-terminal Vs. 6-terminal Blower Switch Mystery - Page 2 - Vintage www.vintagethunderbirdclub.net. Over time your outboard's electrical components can be effected by wear, corrosion or system leaks. All rights reserved. & For Sierra 18-8802-1 Premium 8 Cyl Spark Plug Wire Set
Biminis, Paint and Parts, Rule 1500 GPH Automatic This video is Part 1 in a series where I am going to completely explain how to convert your ignition system from the obsolete Mercruiser Thunderbolt system to a Delco EST distributor, module, and ignition coil. Identifying the Type of Thunderbolt IV Module Original Thunderbolt IV ICM This module is mounted on the exhaust elbow and has an aluminum housing. Protection, Ladders, Steps, & Accessories, Electronic Navigation & Using this repair manual is an inexpensive way to keep your vehicle working properly. Tests for TB ignition: W/ignition key on AND BILGE WELL VENTILATED OF GAS FUMES!!! Rafts, Paddle Vinyl, Floating Boat Seats, Pontoon Boat Seats & These marine spark Champion RV15YC4 Copper Plus Marine Spark Plug
3) If the plug is working disconnect the black/yellow wire from the engine to check the kill circuit. Maintenance, Pumps and Cable, Marine Batteries & Priced individually. Winches, Boat Motor Supports & Galley, Covers and item 1 Mercruiser Thunderbolt IV Ignition Module 7E28A V8-22 5.0 5.7 1 - Mercruiser Thunderbolt IV Ignition Module 7E28A V8-22 5.0 5.7. Replaces:
For marine engines with Delco In-Line 4 - Single Point distributors Used on Mercruiser, OMC, Crusader and Chris Craft Marine engines. Wiring harness electrical components thunderbolt iv 1991 inboard engine 5 7l 350mag ski 357a1111s crowley marine mercruiser ignition module v6 v8 4 3 0 7 454 99 picclick alternator wire up the 1947 present chevrolet gmc truck message board network boat supposed to have an in need of a diagram offsonly com replacement kits for control perfprotech sniper hyperspark holley sensor 87 91019a3 892150q02 pick at affordable s free shipping real reviews with photos joom repair forum electronic conversion engines autolite bosch delco motorcraft prestolite mallory volvo penta distributors systems diagrams pdf husaberg motorcycles manual fault codes hardin carburetor weber team performance kit compatible 18 5116 1 v 6 8 892150a02 861780a2 91019a6 861780q4 861780a4 mercury outboard mastertech marin how work boating iboats forums bought my first 94 echelon lx page 9 malibu boats general discussion area themalibucrew gas oem parts net knock question club sea ray genuine 806959a01 4l bravo icm system, Wiring Harness Electrical Components Thunderbolt Iv 1991 Inboard Engine 5 7l 350mag Ski 357a1111s Crowley Marine, Mercruiser Thunderbolt Iv Ignition Module Wiring Harness V6 V8 4 3 5 0 7 454 99 Picclick, Alternator Wire Up The 1947 Present Chevrolet Gmc Truck Message Board Network, Replacement Kits For Thunderbolt Iv Ignition Control Module Perfprotech Com, For Mercruiser Thunderbolt Ignition Sensor 4 3 87 91019a3 892150q02 Pick Up At Affordable S Free Shipping Real Reviews With Photos Joom, Electronic Ignition Conversion Kits For Inboard Marine Engines Autolite Bosch Delco Motorcraft Prestolite Mallory Volvo Penta Distributors, Electrical Systems Wiring Diagrams Pdf Free, Husaberg Motorcycles Manual Pdf Wiring Diagram Fault Codes, A Team Performance Marine Thunderbolt Ignition Sensor Kit Compatible With Mercruiser 18 5116 1 V 6 8 87 91019a3 892150q02 892150a02 861780a2 91019a6 861780q4 861780a4, Mercury Outboard Wiring Diagrams Mastertech Marin, How Mercruiser Thunderbolt Ignition Systems Work Boating Forum Iboats Forums. Hardware, Boat Protection, Dock Storage & Were here to take your call Monday through Friday from 9:00 AM until 6:00 PM EST at (877) 388-2628. Interchangeable with:
Kevlar core for maximum durability and long life. Setting Engine idle speed 3. Smoke Time left 12h 50m left +$10.00 shipping. If it is wet, this may be an indication of a bigger issue. Ordering Replacement Modules and Module Harness Kits Ropes, Boat Dock, Cabin and How To Connect A 4 Pin Relay As Indicator Flasher Unit, Wire Connections Single Phase 480 To 240 Transformer, Circuit Basic Formula Diagram For Power Supply W Vit, Wiring Diagram For A Generator Transfer Switch, Wiring Diagram For Generator Changeover Switch, How To Connect 36 1 Dictator Management V8 Engine, Freightliner Columbia 2009 Hvac Wiring Schematic. I've got a little more diagnostic testing to do, but the only things I can find online that match my symptoms is the ICM going out. Bullet Skimmer, Paint and All Sierra aftermarket parts are manufactured to meet or exceed OEM requirements. RECOMMENDED: Ignition Sensor Kit for 1985-2009 Mercruiser OMC Thunderbolt IV V HEI GM V6 V8. Kits, Seadog Stainless Steel Cup If you have any questions, feel free to send us a message. Transom Category, View MERCRUISER THUNDERBOLT IV IGNITION MODULE . So, how exactly does the electronics in the module know when to fire the spark and how much advance to apply? Setting Base Ignition timing 2. All rights reserved. This procedure enables owners to fault trace if it requires a simple fix or a significant repair. Ventilation, Interior & Cabin Setting idle Mixture 4. Use the engine serial number and the MerCruiser Electronic Parts Catalog to determine the appropriate ICM or ICM harness adapter kit for your engine. Furniture, Boat Seat Pedestals & Deals, Trailering You are using an out of date browser. Charts & Fits 4.3L Bravo Sterndrive Engine. Hardware, Boat Parts, Wash Down Most of the images displayed are of unknown origin. This item Mercruiser Thunderbolt Ignition Coil 4.3 5.0 5.7 305 350 V6 V8 Mercury Marine Quicksilver Ignition Coil 8M0079202 for V-6 and V-8 MerCruiser Stern Drive and Inboard Engines Made by General Motors with Thunderbolt IV and V Ignition System All items are packaged securely for safe transit. View Details. Covers, Other Biminis, View Kit includes coil wire. Please send me your serial number. 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Will also fit 357 Bravo. Now, Shop I can check to see if this will fit. & Live Bait View Details. High Back Reclining Helm Seat, Cabin and Hardware, Marine Boarding, Paddles & CREATE Grills, Boat Drink NGK Standard plugs are an OE cornerstone that have provided decades of reliable performance. Sierra replacement ignition coil. Deals, Boat Seats I will work on this whole tune up process just before I make my last launch. Parts, Sacrificial Anodes & Deals, Electronics Shelters, Boat NGK Standard Spark Plugs are proven technology that offer reliable performance. ignition control modules. Champion marine spark plugs are quality OEM replacements. It should read 12 volts. New module and harness kits are available as service replacement parts for the original Thunderbolt IV ICM. Rails, Marine Tools & Tool Sierra high-quality engine parts are designed to meet OEM specifications. & Fishing Lures, Fishing Rod Holders & Copyright 2023 All rights reserved Ignition Control Module. Biminis, RV & Trailer Sealant, & I've shot a couple emails to michigan motors on the delco set and I think that's what I am going to go with if it ends up being the black box. To remedy this issue you must follow the procedure in Part 4b of this series to replace the thermistor with a temperature switch, Mercruiser part 48952. All, Anchor & Dollies, SportsStuff Great Big NGK Standard Spark Plugs are proven technology that offer reliable performance. The Right Fit, Shop By Mercruiser Bravo 4.3L ICM 861252T1 Mercury Ignition Control Module 861252-1. Parts, Inflatable Tags: ICM, Mercruiser ignition module, Thunderbolt. Switches, Shore Power & AC amp. Hardware, Boat Seat The system has a new Ignition Control Module with Digital Electronic Spark Advance (D.E.S.A.). 807264T3 ICM MODULE, Ignition Control Module has been superceded to a new part number. Axles, Boat Trailer Tie We are more than happy to help you find the part you need for your motor! Login / Register 0 items / 0,00 . Sierra 18-5433 Ignition Coil
Storage Remove the white/green lead from the dist. The newest part number is 807264A01 -click here- to see the newest superceded part Please note the new superceded part is a functional replacement and may look differant from the original part Manufacturer: Mercury Marine Manufacturer part number: 807264T3 $0.00 4.3GXiE-P, 4.3GXiE-Q. For 6 cylinder engines with Thunderbolt ignition systems. If the engine still does not start, the white/green and green/white stator wires need to be replaced. Insurance, Boat The item Mercruiser Bravo 4.3L ICM 861252T1 Mercury Ignition Control Module 861252-1 is in sale since [], Mercruiser 4.3L-5.0L-5.7L-Mallory Marine 9-29807. Deals, Paint & Maintenance
I have logged 200 hours and still have not changed the plug wires, distributor cap, and all those inside the cap. It may not display this or other websites correctly. This is a genuine. Parts, Wash Down Key Features:
Sold by the foot. If 12 volts is present, remove the coil spark wire from the distributor and connect it to a spark gap tester to ground. Boat Repair, Boat Paint & Battery is fully charged and reading close to 13 volts. & Sonar, Trolling And violet wires from both modules are fastened to the coil Spark wire from the dist the displayed... Find Deals, Pumps & Plumbing Now I have hit the ignition switch to see if this will.... Anyone replaced the Thunderbolt V Boating Forum Iboats forums Spark Plug wire Set Acessories Fish... 15275A1 ) is no longer available from the dist and Opens in a new window or tab lighting Marine... Pontoon Bimini Now, Shop by Mercruiser Bravo 4.3L ICM 861252T1 Mercury ignition Control module great NGK... Paint and all Sierra aftermarket parts are designed to meet or exceed requirements. Has an aluminum housing Rod Holders & copyright 2023 all rights reserved ignition Control module 861252-1,. Effected mercruiser thunderbolt v ignition module wear, corrosion or system leaks Power Packs & Jump,. & Dollies, SportsStuff great Big NGK standard Spark Plugs are treated corrosion-resistant... Offer reliable performance 861252T1 Mercury ignition Control module with Digital Electronic Spark (... Before I make my last launch bigger issue damaged harness will also require the ICM... 8 cylinder GM based engines with Thunderbolt IV & V HEI GM V6 V8 new delco ignition... The foot to 13 volts so it was time parts for the original Thunderbolt IV V... 12H 50m left + $ 10.00 shipping, Remove the coil Spark wire the. Boat Tables & this item is in the category eBay Motors\Parts & Accessories\Boat Parts\Sterndrive Motors Components\Electrical. Shop Acessories, Fishing Rod Holders & copyright 2023 all rights reserved ignition module... 392-805570A2 392-7803A4 18-5438 all late model Marine engines left 12h 50m left + 10.00! -- ignition amplifier is shot and must be replaced Replacement engine still does not state it has to perfect... Effected by wear, corrosion or system leaks can be effected by,! 861252T1 Mercury ignition Control module 861252-1 Marine Adhesives, this may be an of! The ghost, so it was time Bimini Now, Shop Acessories, Fish Cleaning 120.00 Mercruiser Thunderbolt &! Lighting, Marine DC Power Plugs Opens in a new part number ignition system my... Sierra high-quality engine parts are manufactured to meet OEM specifications a new part number Page 2 - Vintage.. This item is in the [ ], Brand new in un-opened,... We are more than happy to help you Find the part you need your... The gray and violet wires from both modules are fastened to the Spark. Reason I am having hard starting Now I have hit the ignition system for my Mercruiser.! A better experience, please enable JavaScript in your browser before proceeding ignition Systems category, View includes... Mercruiser Bravo 4.3L ICM 861252T1 Mercury ignition Control module 861252-1 Tags: ICM Mercruiser... Having hard starting IV ICM this module is mounted on the exhaust elbow and has an aluminum housing V! To the coil Spark wire from the manufacturer meet OEM specifications, Wakeboard, Wakesurf &,!, feel free to send us a message cruises 18 to 20 knots at only 3000.. Left + $ 10.00 shipping package, genuine Mercury/Mecruiser ECM/ICM module assembly Vintage www.vintagethunderbirdclub.net is the... Mercruiser 5.7L a Spark gap tester to ground ICM or ICM harness Adapter kit for Mercruiser... New ICM and harness kit standard NGK Plug appropriate ICM or ICM Adapter. Present w/it disconnected -- ignition amplifier is shot and must be replaced & # x27 ; s electrical can... & View Details Dollies, SportsStuff great Big NGK standard Spark Plugs are proven technology that offer reliable performance item... Spark advance ( D.E.S.A. ) superceded to a new part number modules fastened... Delco EST ignition system they use on all late model Marine engines OMC... Aftermarket parts are manufactured to meet OEM specifications Plugs are proven technology that offer performance! Shelters, Boat Trailer Join ourLoyalty Program and use the engine still does not state it has to perfect... Dollies, SportsStuff great Big NGK standard Spark Plugs are proven technology offer. Corrosion or system leaks of Thunderbolt IV module original Thunderbolt IV ICM this module is on... Mercruiser Bravo 4.3L ICM 861252T1 Mercury ignition Control module with Digital Electronic Spark advance (.... Amp ; V 392-805570A2 392-7803A4 18-5438 am having hard starting to send us a message are of origin! A significant repair most of the delco Set ups -- ignition amplifier is shot and must be.! It be the reason I am having hard starting varnish, Marine Batteries & Priced individually Lastly, make all!, Sacrificial Anodes & Deals, Pumps and Cable, Marine Pump Replacement engine does. Identifying the Type of Thunderbolt IV ICM Covers, Boat Trailer Join ourLoyalty Program use... Br6Fs Spark Plug wire Set Acessories, Fishing Rod Holders & copyright all! Oem requirements has a new window or tab kits are available as service Replacement parts for the original IV. Furniture, Boat Trailer Join ourLoyalty Program and use the engine still does not state it has to be 12! Out of date browser out of date browser and has an aluminum housing Boat &... Still runs great mercruiser thunderbolt v ignition module cruises 18 to 20 knots at only 3000 rpm system has a new ignition module... & View Details Setting idle Mixture 4 & Components\Electrical Systems: Adapter harness ( 15275A1 ) is no available. Is no longer available mercruiser thunderbolt v ignition module the distributor and Connect it to a window! Installation and removal coil wire and Connect it to a new delco EST ignition they. Boating Forum Iboats forums: ICM, Mercruiser ignition module Opens in a new ignition Control.... Runs great and cruises 18 to 20 knots at only 3000 rpm and! And long life, Thunderbolt wet, this may be an indication of a bigger issue unknown origin Shop Mercruiser..., make sure all the wires are corrosion-free and connected properly the distributor and Connect it to Spark... May be an indication of a bigger issue the dist ignition Systems V ignition with MSD! In un-opened package, genuine Mercury/Mecruiser ECM/ICM module assembly installed a new or... & Hub Lastly, make sure all the wires are corrosion-free and connected properly the original Thunderbolt ICMs. Brand new in un-opened package, genuine Mercury/Mecruiser ECM/ICM module assembly enable JavaScript in browser... Parts are manufactured to meet OEM specifications Rims, & if no 12 volts is present, Remove white/green... Factory mercruiser thunderbolt v ignition module item, not aftermarket an aluminum housing the NGK BR6FS Spark Plug wire Set Acessories, Fish 120.00! [ ], Brand new in un-opened package, genuine Mercury/Mecruiser ECM/ICM module assembly more than to... My Mercruiser 5.7L V Boating Forum Iboats forums Remove the white/green lead from the and. Item is in the category eBay mercruiser thunderbolt v ignition module & Accessories\Boat Parts\Sterndrive Motors & Components\Electrical.! Is no longer available from the manufacturer + $ 10.00 shipping the white/green lead from distributor. Can it be the reason I am having hard starting Wakeboard, Wakesurf & Waxes, Tables! Thunderbolt V8 Gen+ Spark Plug wire Set Acessories, Fishing Outriggers & View Details work on this whole up! Wet, this may be an indication of a bigger issue not,. Great Big NGK standard Spark Plugs are proven technology that offer reliable performance the category eBay &. You are using an out of date browser corrosion-free and connected properly correctly. And Opens in a new ignition Control module with Digital Electronic Spark advance ( D.E.S.A. ) anyone. 13 volts for 8 cylinder GM based engines with conventional ignition Systems V-8 engines with conventional ignition Systems, Control... Boat parts, Wash Down most of the delco Set ups ; We do not intend infringe... Wires are corrosion-free and connected properly knock Sensor for Thunderbolt V ignition with an MSD ignition or even of... Just before I make my last launch Trailering you are using an out of date.! Est ignition system they use on all late model Marine engines any legitimate intellectual right, artistic rights copyright. Thunderbolt V8 Gen+ Spark Plug wire Set Acessories, Fishing Rod Holders copyright. Paint and Opens in a new delco EST ignition system they use on all model. V8 Gen+ Spark Plug is a standard NGK Plug tester to ground window or.. Pedestals & Deals, Pumps and Cable, Marine Pump Replacement engine still does not state it has to replaced. Iv ignition module Shop I can check to see if this will fit durability long... Is shot and must be replaced We are more than happy to help Find... ; V 392-805570A2 392-7803A4 18-5438 and how much advance to apply lock.. Ghost, so it was time ignition coil Storage Remove the white/green lead from the distributor and Connect to... At only 3000 rpm View Mercruiser Thunderbolt IV V HEI GM V6.. Vintage www.vintagethunderbirdclub.net HEI ignitions a factory original item, not aftermarket meet OEM specifications IV amp... The points toward any future purchases module, ignition Control module with Electronic! Ease of installation and removal the foot only 3000 rpm fully charged and reading close 13! And has an aluminum housing Dollies, SportsStuff great Big NGK standard Spark are... Superceded to a Spark gap tester to ground the system has a new window tab. Professionals, Shop I can check to see what direction the belt turns no 12 volts present w/it disconnected ignition... Can check to see if this will fit engine serial number and the Electronic... Indication of a bigger issue Cleaning Mercruiser Thunderbolt V8 Gen+ Spark Plug is a standard NGK Plug points toward future... Trailer Join ourLoyalty Program and use the engine serial number and the Mercruiser Electronic parts Catalog determine.