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  1. R

    Timing is retarded ;-)

    2 DEG ATDC TIMING DISTRIBUTION 600 RPM - 700 RPM ENGINE. GASOLINE 87 OCTANE. https://www.jblllc.com/wp-content/uploads/2015/03/GM-3-L-Service-Manual.pdf
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    1978 Mercruiser 228 Sterndrive help

    ROY WILLIAMS The 1978 WELLCRAFT 20 FT / ENGINE 470 MCM. 4 CYL. MERCRUISER 170HP. 41 YEARS AGO, 1984-2025 ...MANUAL MERCRUISER 2 BOOKS.
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    Ballast Resistor or not?

    The key starter engine on , coil 12 volts of the ignition coil + ... The ignition coil run engine , of the resistance 1.8 wire, key on engine on 9 volts ignition on .
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    Resistor wire

    the key on engine starter ignition coil +12volts .....the engine on key switch on , 9 volts of the wire 1.8 ohms resister of the choke - resister ignition coil positive +.... 9 volt...
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    Resistor wire

    the engine starter key 12 volts coil ..... then the key 9 volts engine runs ... purple wire resistor 1.8 resistor coil + engine on !
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    Mercruiser 888

    MCM 888 engine max 3800-4200 rpm ....
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    Mercruiser 888

    MCM 888 ENGINE 188 HOUSEPOWER .
  8. R

    Mercruiser 888

    THE ZINC PLUS ZDDP 6 OZ ....MCM470 1978 ! NO ENGINE HEARING ...NO TAPPETS ...
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    Mercruiser 888

    Mercruiser 1977 service manual !!!!!!!!! MERCURY ! BOOKS 1/2 ...... MCM 888 1970'S ENGINE OIL 30w-40w ....ZINC PLUS ENGINE OIL 6 OZ..... MCM 470 ENGINE 1978 ROY WILLIAMS ! 40 YRS AGO 2024 TODAYS !
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    Mercruiser 888

    PROPELLER , 20-25 FEET BOAT DIA 15-3/4 IN PITCH 17 INCHES 3 BLADES GASOLINE 93 OCTANE AND THE ENGINE OIL 30 - 40 W... 5-10 BTDC TIMING 700 RPM ENGINE RPM MAX 3800-4200 1970'S
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    Pertronix Upgrade Question

    1978 MCM470 Pertronix 1146A 1992 year ago ... 40 years ago ... 2024 year . so the key ignition , engine run ! now the engine key on , no engine ... 30 seconds the key ignition on , no engine ..... damaged it ...... the choke carb Pertronix 1146a red wire , then 1146A black ignition coil -...
  12. R

    3.7 gets hot while idling

    exchanger water ,,, distilled water 50% antifreeze coolant engine 50% ... my MCM470 1978 engine ,,, exchanger distilled water 40 % 60% engine antifreeze ... RV antifreeze, no?
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    Mercruiser 170/470 Starter Question

    my MCM470 engine starter very nice !
  14. R

    engine oil

    BRIAN 31227 THE ENGINE OIL 25-40 WT ... MY ENGINE 470 MCM OIL 30WT AND THE SN PLUS 6 OZ ....1978 -2024 ENGINE VERY GOOD JOB ...
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    Mercruiser 170/470 Starter Question

    the MCM470 ENGINE STARTER ...
  16. R

    5.0 oil weight and amount

    my WIX XP FILTER OIL ... 20 YEARS !!! THE FRAM CHINA !
  17. R

    5.0 oil weight and amount

    the WIX XP OIL FILTER ..... MY VEHICLES/MERCRUISER THE WIX XP ENGINES ...
  18. R

    Mercruiser 170hp 470 no spark

    the shifting interrupt cable switch !!!! the adjustment switch and the switch rusted/lube/cable ... my MCM470 years ago 1978 ... 2024 good engine .. yes the lube cables 470 engine ..
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    About to go insane about my 470!!

    MY MCM 470 YEAR 1978 the engine 46 year ago 2024 ... The carb inspect .. the 93 octane gas .... the engine oil sn plus 6 oz the engine oil 30wt ...5.5QT ... my Wellcraft boat 20ft very good job ! foste 1 ---- the engine compression pressure 4cyl 130-150 psi ......so fuel gas pump ....3-6 psi ..
  20. R

    mercruser 888 wont rev past 2000 when in gear in the water

    CARB MODEL 2GV 7044185, 7044187, 17056197 / HOLLEY G317-1
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