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  1. jimmbo

    Mercruiser 5.7 won’t make power

    By "way off", what do you mean?
  2. jimmbo

    Mercruiser 5.7 won’t make power

    That has been asked many times, and still no answer
  3. jimmbo

    What brand of 2 stroke oil do you use for your Johnson Evinrude 2 stroke

    I don't think that Project Farm Guy heats the Oils up to 300F
  4. jimmbo

    Hydro Shield Skeg Foil

    Any of those Doelfins, Whaletails, are really, Solutions in search of a Problem. They can and do create more problems than they could ever solve. Plus they just look Stupid. If they did anything of Value, the motors/outdrives would be coming out of the Factory with AV Plates that size and shape
  5. jimmbo

    Force 125 hp 4 cyl dies at idle. Any ideas what I should check?

    Compression, both Crankcase and Cylinder Fuel in the correct portion Spark at the correct time All are needed for the engine to start and run. Take away any of them and it won't, or it won't run well. So... Compression Test Does the Ignition System produce a Spark that can jump a 3/8" gap at all...
  6. jimmbo

    Mercruiser 5.7 won’t make power

    That is one that a lot of People who rebuild their engines miss, and todays Oils aren't Flat Tappet Cam friendly
  7. jimmbo

    Anyone Seen these?

    I can't comment on the Tahoe-Escalade comparision, but I have owned several Caddies and their cousins in the Buick and Olds lines, often at the same time. There were many differences in the Cars, construction wise. Anyone who would try to tell me their Buick Electra, or Old Regency was the same...
  8. jimmbo

    Mercruiser 5.7 won’t make power

    I try to find a source near the carb, or on the base of the carb, preferably one that can read both Plenums. On my Boat's Holleys(factory 500cfm 2bbl, and the 4175 650cfm SB I stuck on), I used the choke pulloff vacuum hose, once the engine was warm, and the choke was fully open, it wasn't...
  9. jimmbo

    Spark plugs for older Merc (80s)?

    Starting in the mid 60s, thru the 80s a majority of engines used Surface Gap Plugs. They were touted as being less prone to causing Preignition than Conventional Plugs as they were a very Cold Plug. And though that could cause Fouling, it was advertised that the very High Voltage of the then...
  10. jimmbo

    Mercruiser 5.7 won’t make power

    Have you put a vacuum gauge on the engine?
  11. jimmbo

    Hydro Shield Skeg Foil

    Being that the Skeg is pretty thin where that Monstrosity attaches, I can't see it remaining attached for long. At least there will be an increase in speed when it does break off
  12. jimmbo

    Anyone Seen these?

    Unlikely it will go below 2G. Plus it really is a Disposable Prop. It would be more difficult to repair it, than to mill a new one
  13. jimmbo

    What brand of 2 stroke oil do you use for your Johnson Evinrude 2 stroke

    Premixing as in a tank, as the oil was not formulated to mix or stay mixed with gas. In an Oil Mixing system on an Engine, it would not be much of a concern
  14. jimmbo

    What brand of 2 stroke oil do you use for your Johnson Evinrude 2 stroke

    Merc OptiMax Oil and BRP XD100 are not even TCW-3 rated. However they far Exceed that 30 yr old Spec, which fell short of what DI Engines required of Oils
  15. jimmbo

    Spark plugs for older Merc (80s)?

    Been there, had it happen.
  16. jimmbo

    What brand of 2 stroke oil do you use for your Johnson Evinrude 2 stroke

    Early bottles of XD100 had a Warning on the label, not use it as a Premix. More recent bottles no longer have that warning.
  17. jimmbo

    Spark plugs for older Merc (80s)?

    Interesting, the Spark Plugs are shown to be L76V, but in Canada QL78V. All are Surface Gap Plugs.
  18. jimmbo

    Spark plugs for older Merc (80s)?

    The Part# given ThomW in Post #3 is correct As for the Plug Wires, I never grounded them, and I never got a shock while checking compression. I have gotten plenty of shocks while touching the Wires, attached to the plugs, when the engine was running
  19. jimmbo

    Spark plugs for older Merc (80s)?

    Ground the Plug Wires
  20. jimmbo

    Now what

    Won't rust as fast underwater.
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