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  1. Scott06

    Crank but No Start troubleshooting

    Voltage will drop some during cranking. Are your battery and ground connections clean and tight ? Is battery in good shape ?
  2. Scott06

    4.3 MerCruiser Intermittent Stalling

    Yes if you have fuel spitting out when u fill up likely vent is plugged. Next time this happens open the fill cap and see if tank is under a vacuum. If it runs better with cap open then go clear the vent
  3. Scott06

    running engine without drive on it

    No that hole is the shift cable. Looks like your gimbal ring and bellhosuing is off? There is a 5/8 hose that connects to bellhousing clamps on a right angle fitting at top above gimbal bearing can put a hose on there or go inside engine compartment and find hose coming up from drive to the heat...
  4. Scott06

    Swap 888 outdrive with Alpha One Gen 1 outdrive?

    Would pull the drive , drain lube suspect u will find metal. Coupler splines could be chewed up to. Might grab at idle but not higher throttle you would see the end of the driveshaft chewed up, looking in coupler through gimbal bearing coupler splines would be chewed too. if it is the coupler...
  5. Scott06

    Swap 888 outdrive with Alpha One Gen 1 outdrive?

    Yes a alpha one gen one is a direct bolt in swap. Just need to match the gear ratios which should be stamped on the side. Given the age of both and possibility they were regeared at some point might be worth popping the top cap and counting teeth
  6. Scott06

    Trim pump solenoid

    they really are relays especially if u hang out with engineer weenies…not sure why they get called a solenoid
  7. Scott06

    Accurate Horsepower Figures

    Sounds like a winner. The old prop must have been messed up as black max and black diamond are same prop under Mercury and Quicksilver labels respectively. if you are hitting that upper end of rpm range you are spot on. Just watch rpms when lightly loaded.
  8. Scott06

    Accurate Horsepower Figures

    You could try going up one hole for a slightly larger pump shot see if that makes any difference
  9. Scott06

    Not getting Spark on MCM170 Alpha 1

    Best to start your own post so we can get details of what's going on. your examples sounds like you aren’t getting 12 v to coil either bad ignition switch, man overboard switch is tripped , or shift interrupt is tripped . Disconnect shift interrupt at shift plate to test .
  10. Scott06

    350 Mag Mpi hard to start when warm or hot

    In the manual there will be ohm specs for coil primary and secondary sides easy to test
  11. Scott06

    3.0L MerCruiser, idle trouble.

    Would also mention checking fuel system for contamination. That carb is an aftermarket version of a mercarb so it’s second time the boat has had carb issues. Would verify fuel system contaminants are not gumming up the carb
  12. Scott06

    engine swap need to find right prop

    I think you are going to run out of available lower pitch props, so would look to get the 2.4:1 ratio drive, then play with props
  13. Scott06

    4.3 mercruiser vs vortec pistons

    Marine cam is best bet. auto head gaskets will corrode in raw water vs marine that are stainless or composite to stand up to raw water vs antifreeze.
  14. Scott06

    4.3 mercruiser vs vortec pistons

    A lot of bunk theories on marine vs automotive. Marine engines are basically a truck engine . Is the donor engine out of a car or truck. if car you will need to swap the cam . Truck cams are close enough to marine cams to work. Swap head gaskets for marine and freeze plugs for brass or...
  15. Scott06

    Bogging issue

    what line do you pull off? The fuel line ? of that is the case then you either have too much fuel pressure or a bad float or needle and seat
  16. Scott06

    Trim pump solenoid

    This has the two trim solenoids on it - https://www.marineengine.com/parts/mercruiser-sterndrive-parts/alpha-one-genii-1998-and-up/0l100040-up/hydraulic-pump-and-bracket looks like they are the same as starter solenoids
  17. Scott06

    2017 Stingray 198 LX

    Most likely the dash or switch pack is used for multiple boats - my sea ray has a switch for a windshield wiper, yet there is no wiper on the boat. I used it when adding LED lights....
  18. Scott06

    Accurate Horsepower Figures

    I didnt mean to rejet- both the 5.0 and 5.7 have the same jetting. this is the file I meant to attach with those specs. Not sure if the venturi is any different other than the holes for accelerator pump nozzles, which could be drilled out.
  19. Scott06

    What do I check next on overheating issue?

    this guy shows how to check for bravoitis I would think u can do it with out janking the engine if you are young and skinny (aka not me) Here is a thread on testing water flow from raw water pump - it think 7.5 qts in15 sec...
  20. Scott06

    Accurate Horsepower Figures

    If you have too much pitch that would be the case, but usually to get on plane relatively quickly I'm 2/3-3/4 open throttle, then pull back once on plane. Your WOT RPM will be key- if you are on the low side of your range say 4400 rpm go down to a 19" pitch. The carb was set up for a 5.0 - the...
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