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  1. R

    Replacing 5.0 oil pan, gasket, bolts

    GM did 2007 and new the CCP parts are damaging .. plastic parts LOL !!!
  2. R

    Engine flushing

    I did the heat exchanger coolant on my MCM470 . I used antifreeze coolant 65% distilled water 35% ... the engine has the pervious owner [1985] ... THEN did the coolant pump [WATER ] then the CAM SHAFT CORROSION AREA..OF THE COOLANT SEAL PUMP...I did the cam shaft cap to setup the cam rod [heat...
  3. R

    470 swap to 4.3

    the engine is the wrong timing ... cylinders pistons are like a fire piston then it is seized ... hot !!!
  4. R

    470 swap to 4.3

    my 1978 MCM470 a carb 2barrel 170HP.. I bought it in 1986 ...I winterized it now .... the engine oil is 15-40 wt ... I put sn plus 4OZ in the oil ... and I used 93 octane gasoline with the marvel mystery oil 2 oz in 10 gallons ... the engine runs great . no damage , also the flat tappets have...
  5. R

    Trim cylinders only retracting halfway

    the trim pressure motor had the motor was not working ...looked up the connectors and also remove the motor brushes and the armature had a bit of corrosion .. other trim cylinders had seals breaking down ..
  6. R

    Reverse engine lock won't hold on vintage Mercruiser IO 153 cu.in. 120 hp engine

    you have to troubleshoot the outdrive up/down ... electrical or the cylinder .. https://www.marineengine.com/parts/mercruiser-sterndrive-parts/120140-19671969/2062141-thru-2791956
  7. R

    Alternator wiring issues

    so you ran the engine the alternator is 15.5 VDC ..then the battery is 11.8 VDC ... did you inspect and clean and tighten the connectors or the battery switch ..USE A VOLTMETER .....WIRE BRUSH IT ON THE CONNECTORS . USE THE COPPER SCREWS/BOLTS NUTS ............
  8. R

    Deleting the voltage regulator 470

    my MCM470 engine replaced it the voltage regulator ....then 3yrs the regulator is dropping the voltage currents. then I updated the alternator many years ago ..I did not remove the voltage regulator ... I did not replace the hose .... so if you replaced that hose or with the connector ... the...
  9. R

    Time to chuck the 470

    look up the 470 used parts exhaust manifold .. my 470 engine has the coolant and the distilled water .... I did not use the coolant leaks .....1978 eng 470 ...
  10. R

    Stern Drive to Alpha One?

    did your MR outdrive is 46 yrs ? in todays world the outdrive is breaking down around 5 yrs ... LOL .... inspect the old outdrive do the water pump flush out the gear oil...inspect the air pressure ....the time is 7-10psi .. 3 hours pressure is correct PSI.. post you picture ..
  11. R

    Correct time to winterize stern drive engine?

    drain all the engine plugs take it out .. then in the spring install the water plugs... take off the outdrive in the fall then inspect all those parts and lube it . then install the gimbal gasket .. take out the spark plugs use the marvel mystery oil 1 OZ ..in the cylinder .then use a plastic...
  12. R

    Winterization

    I did my engine coolants 65% and 35% distilled water ....-55 F...also all my vehicles ..has no leaks and the system is very clean no corrosion ..
  13. R

    Winterization

    yes I was hitting the soviet union missile subs in the east coast and the Caribbean .. fix the us navy attack subs... back in the 1970's
  14. R

    Fogging oil won't kill engine

    my engine is 1986 and is now .. I fogged in the fall ,engine runs time around 20-40 sec....no engine damage .. then I put in Marvel mystery oil I ounce each cylinders in the spring and a delayed it a few days ago ..then engine runs it on the muffs ...engine runs like a idle speed no rough...
  15. R

    Installed Pertronix ignitor. Now rough idle

    did you update the pertronix ? then the positive coil is engine running to the 9.5 volts on the coil positive.. then you have to change the engine timing ... the idle is rpm rough so also do the next adjust carb mixture ... the points are around 10-12Kv spark .. then the pertronix is...
  16. R

    Lost oil in sterndrive

    use a air pressure 7-10psi in the outdrive . then the air is dropping spray a dish soap and see if the seals are bubbles up then fix the seals ... or a alum crack .............. drain the gear oil then inspect the leaks ... I flushed outdrive , used engine oil 0-20wt ...gear oil is dirty /...
  17. R

    overheat mercruiser

    I did the water muff on the outdrive ...cranked it 3 times no start ,then engine runs with idle RPM ....... in todays world the CCP impeller is a breakdown .. post your impeller .. most replace it 1-2 yrs ...
  18. R

    overheat mercruiser

    you have to use the water hose muff on the lower outdrive flush it out ... then drain the engine water ports , then pour in the engine antifreeze coolant drain ports ... use a turkey baster...
  19. R

    No gas to carb

    you should put the fuel pump in a cup of gas.. remove the fuel filter pump can, put a small cup of gas , then install the fuel filter pump filter cover , see if the engine runs . then cranks 5-10 sec .. another crank later 2-4 min ..5-10 sec cranks it .. then no engine runs .. then use a...
  20. R

    Fogging oil won't kill engine

    I was shutting the fuel valve then spayed the fogging spray can oil.. did it 20 sec ..idle is around 650 RPM... then I put marvel mystery oil in the cylinders 1 oz... my engine is over 40 yrs old no engine damage.. used the plastic bag to seal the carb...
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