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KEY 8M0032837 REC8M0032837
Description
Function and technical context
The key is a critical precision component in the timing and ignition system of Mercury, Mariner and Mercruiser engines. This part ensures the synchronized transmission of the rotary movement between the crankshaft and the distribution elements, guaranteeing the exact alignment of the valve opening and closing times. A failure in this key causes misalignment of the camshaft, loss of ignition timing, drastic reduction in power and, in severe cases, internal engine damage due to collision of valves with pistons.
When to replace this part?
Symptoms of wear include abnormal vibrations in the engine, difficulty starting, progressive loss of revolutions and metallic sounds coming from the engine block. Although the cotter pins are designed for long life, it is advisable to inspect them during each seasonal inspection and replace them preventively if any signs of loosening or wear are detected. Preventive replacement avoids costly repairs resulting from misalignment of the distribution and guarantees optimal operation of the ignition system in high-altitude navigation.
Compatible MerCruiser and Mercury Mariner Engines
| Marca | Modelo | Rango de serie |
|---|---|---|
| MerCruiser | 5.0L (2 BBL.) GM 305 V-8 | 0B774445 THRU 0F600999 |
| MerCruiser | 5.0L MIE (4 BBL.) GM 305 V-8 | 0B522506 THRU 0B788151 |
| MerCruiser | 5.0LX (4 BBL.) GM 305 V-8 | 0B773740 THRU 0F600999 |
| MerCruiser | 5.7L GM 350 V-8 | 0B525982 THRU 0F600999 |
| MerCruiser | 5.7L MIE GM 350 V-8 | 0B788197 THRU 0F024999 |
| MerCruiser | 5.7L ALPHA EFI (TBI) GM 350 V-8 | 0F355305 THRU 0F752389 |
| MerCruiser | 5.7L BRAVO EFI (TBI) GM 350 V-8 | 0F225560 THRU 0F752399 |
| MerCruiser | 5.7L COMPETITION SKI GM 350 V-8 | 0B514627 THRU 0F775199 |
| MerCruiser | 5.7L MIE GM 350 V-8 | 0F025000 THRU 0F622099 / 0F622151 THRU 0F746099 / 0F622100 THRU 0F622150 / 0F746100 THRU 0K040306 |
| MerCruiser | 7.4l MIE W/B/W GM 454 V-8 | 0B788366 THRU 0D715493 |
| MerCruiser | 7.4L BRAVO GM 454 V-8 | 0B771113 THRU 0D603117 |
| MerCruiser | 7.4L MIE W/HURTH GM 454 V-8 | 0C391564 THRU 0D715493 |
| MerCruiser | 8.2L MIE W/HURTH GM 502 V-8 | 0C878221 THRU 0D857199 |
| MerCruiser | 200 (2 BBL.) GM 305 V-8 | 6218462 THRU 0B525981 / 0B525982 THRU 0B774444 |
| MerCruiser | 228 (4 BBL.) GM 305 V-8 | 5170009 THRU 6218461 / 6218462 THRU 0B525981 |
| MerCruiser | 228 MIE (4 BBL.) GM 305 V-8 | 5170009 THRU 5907057 |
| MerCruiser | 230 (4 BBL.) GM 305 V-8 | 6218462 THRU 0B525981 / 0B525982 THRU 0B773739 |
| MerCruiser | 230 MIE (4 BBL.) GM 305 V-8 | 0B522506 THRU 0B788151 / 5907058 THRU 0B522505 |
| MerCruiser | 260 (4 BBL.) GM 350 V-8 | 4908850 THRU 6218461 / 6218462 THRU 0B525981 / 0B525982 THRU 0B773739 |
| MerCruiser | 260 MIE GM 350 V-8 | 0B522506 THRU 0B788196 / 5907058 THRU 0B522505 |
| MerCruiser | 330 GM 454 V-8 | 6083145 THRU 0B816540 |
| MerCruiser | 340 MIE W/B/W GM 454 V-8 | 5889914 THRU 0B788365 |
| MerCruiser | 350 MAG. (SKI) GM 350 V-8 | 0D505450 THRU 0K040399 |
| MerCruiser | 350 MAG. ALPHA (4 BBL.) GM 350 V-8 | 0B525982 THRU 0F600999 |
| MerCruiser | 370 TRS GM 454 V-8 | 4179554 THRU 6721527 |
| MerCruiser | 400 TRS GM 454 V-8 | 4179554 THRU 0B457644 |
| MerCruiser | 420 GM 454 V-8 | 0A398941 THRU 0B622418 |
| MerCruiser | 425 GM 454 V-8 | 0A398941 THRU 0D937011 |
| MerCruiser | 425 (GEN. V) GM 454 V-8 | 0A398941 THRU 0D937011 |
| MerCruiser | 440 TRS GM 454 V-8 | 4179554 THRU 0B485220 |
| MerCruiser | 454 MAG. BRAVO GM 454 V-8 | 0B721206 THRU 0D805068 |
| MerCruiser | 460 TRS GM 482 V-8 | 4179554 THRU 6181046 |
| MerCruiser | 470 (2 BBL.) | 5520115 THRU 6218036 |
| MerCruiser | 470 MIE | 5520115 THRU 6218036 |
| MerCruiser | 500 BULLDOG GM 540 V-8 | 0C577254 THRU 0F745405 |
| MerCruiser | 600 SC GEN IV & V GM 502 V-8 | 0D456489 THRU 0F877642 |
| MerCruiser | 800 SC (GEN. V) GM 572 V-8 | 0D763836 & Up |
| MerCruiser | 898 (2 BBL.) GM 305 V-8 | 6218462 THRU 0B525981 |
| Mercury Mariner | 30 JET | 9570790 THRU 0G589999 / 0C159200 THRU 0G589999 |
| Mercury Mariner | 35 2 CYL | 0B110789 THRU 0B458383 / 9466647 THRU 0C214735 / 209608 THRU 0B110788 / 6445653 THRU 0B110788 / 9384476 THRU 0B110788 |
| Mercury Mariner | 40, 400 4 CYL | 9570790 THRU 0G589999 / 0C159200 THRU 0G589999 |
| Mercury Mariner | 40, 400, 402 2 CYL | 5556230 THRU 0B239231 / 7144763 THRU 0B239231 / 8064750 THRU 0B239231 / 9251456 THRU 0B239231 |
| Mercury Mariner | 45, 450 4 CYL | 5531630 THRU 0B110788 / 7143688 THRU 0A719280 / 8063985 THRU 0B110788 / 9248006 THRU 9466691 / 9466692 THRU 09522535 / 0A719281 THRU 0A745944 / 0B110789 THRU 0B370271 |
| Mercury Mariner | 50 3 CYL | 7208333 THRU 0A721307 / 9385911 THRU 9469199 / 6428681 THRU 0B122929 / 9469200 THRU 9683054 / 0A721308 THRU 0B240466 / 0B122930 THRU 0D000749 |
| Mercury Mariner | 50, 500 4 CYL | 5531630 THRU 0B110788 / 7143688 THRU 0A719280 / 8063985 THRU 0B110788 / 9248006 THRU 9466691 |
| Mercury Mariner | 60 3 CYL | 6428681 THRU 0B122929 / 7208333 THRU 0A721307 / 9385911 THRU 9469199 / 9469200 THRU 9683054 / 0A721308 THRU 0B240466 / 0B122930 THRU 0D000749 |
| Mercury Mariner | 70, 700 3 CYL | 5579017 THRU 6428680 / 7145938 THRU 7208332 / 8065065 THRU 8085061 / 9255131 THRU 9385910 |
Equivalent manufacturer part numbers
| Manufacturer/Brand | Reference/Part Number |
|---|---|
| Mercury/MerCruiser | 8M0032837, 28-56662, 28-8M0032837, 56662 |
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