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  1. R

    Impeller pump cover

    The impeller outdrive 100 hours .. the no water is the impeller ....today ! so the impeller water is corroded , rubber mess ..
  2. R

    Mercruiser 470 runs rough after 15 Minutes

    My Wellcraft 20 ft the engine MCM470 year 1978 ... TODAYS !!! 40 YEARS !!! SO the engine is gasoline vent clean it . the fuel pump and the carb 2 filters. the 650-800 rpm ignition 4-8 degrees . the gasoline 91-93 octane . the engine oil 30WT ... the engine oil zinc plus 6 OZ ... THE coolant...
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    Alternator Belt

    the belt is the older mess ,,,, the new belt various the auto store ...
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    1976 888 Fuel Questions

    my 1978 MCM470 engine `the gasoline 90-93 octane and the marvel mystery oil 1OZ and the 1OZ marine additive 10 gal gasoline tank . decades of the gas tank 1986-1996 the lead 10 yrs 1oz of the 10 gallons of the tank .... marine additive is gasoline today ....
  5. R

    3.7 gets hot while idling

    The 3.7 engine of the year ? the water exchanger ? the 3.7 engine of the coolant 140F ..... the outdrive is inspecting it the new impeller and the damaged it new ....
  6. R

    Engine keeps running after power shut off

    the gasoline 2 years ago the tank ......is a mess ............ my boat engine the gasoline, marvel mystery oil 10 gallons one OZ. the marine gasoline additive 1 OZ. 10 gallons ....my boat tank is the fall dropping it of the gasoline ... then the truck gasoline tank !. The pistons of the MMO...
  7. R

    serpentine belt too close to exchanger?

    the engine coolant antifreeze 50% and the water distilled 50% of the heat exchange ... my engine is very good ...
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    1976 888 Fuel Questions

    my MCM470 year 1978 .. the gasoline 90-93 octane 10% alcohol ... the marine additive one oz. 10 gallon gasoline ... the marvel mystery oil one oz. 10 gals .....the carb is very good and the gasoline tank ....no mess !!!! the winter boat tank gasoline draining it .... then the truck gasoline...
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    Carb issue.

    the fuel tank of the water ... so the fuel tank is the water inspected . vented it !
  10. R

    Hard plane after switch from points ignition

    The 650-800 rpm engine 1985 the timing 4-8 BTDC ....now the rpm 1500rpm timing ? ... my engine oil 30wt and the zinc plus 4-6 OZ ...the gasoline 90-93 octane , the timing 4 BTDC .. my 1978 MCM470 is a very great engine ! gasoline 93 octane ...the 40 years
  11. R

    Mercruiser 3.0 stalls at 1000-1500 rpm.

    the carb and the gas filter cleaning carb and the new filter . the gasoline tank is the dirty ? my marvel mystery oil and the marine gas stabilizer treatment very good gas carb and the gas tank decades !
  12. R

    Which engine oil can I add?

    the MCM470 1978 engine oil 40w .. also the zinc 4-6 oz.
  13. R

    Hard plane after switch from points ignition

    so the 3.8L engine 1985 or 1985 4.3L engine ? so 1985 ignition 4- 8 BTDC timing 650-750 RPM ...
  14. R

    Mercruser 470/ 170 compatible parts

    was the engine Mercrusier ?
  15. R

    1976 888 Fuel Questions

    the new muffs two water hoses left/right outdrive .....the 140F of the engine ... damaged it of that one muff hose , damaged it ....175F engine water hotter ...
  16. R

    1981 120 Mercruiser idles rough when hot

    yes that ignition coil very hot off the resistor damaged it ... new ignition coil ..
  17. R

    1971 3.0 Liter Carb Question..

    THE 700 RPM IDLE AND THE TIMING 6 DEGS ... ALSO THE DWELL 31-34 ... THE IGNITION POINTS INSPECTED IT ..
  18. R

    Stern Drive transom lower right bolt fell out

    the wooden rotten of the engine studs ... the wooded is cleaned it out rotten .. then the fiberglass ..
  19. R

    Mercruser 470/ 170 compatible parts

    https://www.amazon.com/dp/B0177KD04S/ref=sspa_dk_rhf_search_pt_sub_7/?_encoding=UTF8&ie=UTF8&psc=1&sp_csd=d2lkZ2V0TmFtZT1zcF9yaGZfc2VhcmNoX3BlcnNvbmFsaXplZA%3D%3D&pd_rd_w=tjBUj&pf_rd_p=74b85f4a-bfbe-49a3-8252-7e9927a19318&pf_rd_r=RNK72149SPNHXTT4RKEV&pd_rd_wg=M3P3x&pd_rd_r=7149ea37-0043-429a-9f5d...
  20. R

    1976 888 Fuel Questions

    THE BOAT GAS TANK FLUSHING IT OUT ...THEN THE NEW 93 OCTANE GASOLINE ....gas tank MMO 2oz. 10 gallons around 2000 year alcohol 3-6 months tank .... the gasoline is a mess MUCKY... also the carb in the take it off clean it MMO oil ......
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