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  1. R

    Runs great on muffs but not in lake

    my boat had a high power in the water ... then the engine drops the lower power ... I cleaned the gas tank vent ...then it runs high power ! my driveway runs good but I had to clean that gas tank vent ...engine runs great in the water ..
  2. R

    New to boats and about to burn down my boat. Need some help with wiring.

    the module connector pins inspect it .. the spark plug put on the wire out of the engine and see if the spark is a bright color .. or the spark is a dull color or no spark ..put the spark plug on a clamp to the engine block ...
  3. R

    New to boats and about to burn down my boat. Need some help with wiring.

    did you use a voltmeter .. voltage on the coil ...spark module are breaking down ..
  4. R

    fuel pump 260 hp 350 mercruiser

    CCP IS A LOT OF FAILURES .....
  5. R

    fuel pump 260 hp 350 mercruiser

    put on your MCM engine the year ..serial #....
  6. R

    MCM 470 Starter Shot? Replacement options?

  7. R

    MCM 470 Starter Shot? Replacement options?

    MHA7016 STARTER MOTOR ,,,,,MCM470 1978 https://www.obbstartersandalternators.com/5660-50-72550-50-72550a1-46-2273-46-3599-mha6104-p-4056.html Application: Mercruiser Engine - Marine Model 470 MIE Mercury 3.7L - 224ci - 4cyl 1980-1981 Mercruiser Stern Drive Model 470 Mercury 3.7L - 224ci...
  8. R

    Prop Contacts Trim Tab Only When In Gear Not Neutral

    the trim tap is different ..post the picture ...
  9. R

    Best upgraded ignition system for use with Sniper EFI on a 1979 Mercruiser 260

    MY Mercrusier engine 1978 changed the ignition points ...increased the HP and had a lot of lower gasoline ..pertronix
  10. R

    Is My Impeller Bad? Mercruiser 228

    I do not use acetone ....use metal ... do not use rubber parts ..looks like the impeller cracks spray on acetone damages it ...
  11. R

    Is My Impeller Bad? Mercruiser 228

    the cylinders are water in it ..the impeller had a breakdown and the sea water ran a small amount in the heat exchanger that increased the engine heat and the head gaskets breaking down ... that picture is the impeller is rubber cracking it and bent the fins .. put oil in the cylinders and...
  12. R

    MCM 3.7 190 cap and rotor question

    put the new cap /rotor and inspect the ignition timing ... pertronix !!!! works very good .................
  13. R

    Prop Contacts Trim Tab Only When In Gear Not Neutral

    did you look up the old prop and the new prop ...bushing is a different new prop bushing or other prop lock ups nut etc..
  14. R

    Engine dies after 30 seconds of running

    inspect the fuel filters ...also take out the gasoline out of the tank and see if its dirty ...use a glass clear bottle ..
  15. R

    Can I install a newer outdrive?

    yes my alpha 1 MR is the same picture... ratio 1.84 20ft 3,000lbs ..170HP..470
  16. R

    Alignment Tool

    some youtube video the tool did a wrong diameter smaller .. lookup all those videos ....amazon posts the alignment tool good/bad...
  17. R

    Alignment Tool

    your alignment tool is the post ! the tool ? the boat does a distortion then you have to use the tool and the tool is putting it in .. use the video to adjust the motor and the tool is in total.. put some grease on the tool ..
  18. R

    No fire

    use a voltmeter ...
  19. R

    No fire

    use a voltmeter ... troubleshoot the coil voltage . engine cranks and the engine does not run ... no spark ...distributor cap troubleshoot ...
  20. R

    Is My Impeller Bad? Mercruiser 228

    open the heat exchanger caps front . rear then see if the water drips out to the sea water area .. I fixed it ..but ?
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