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  1. jimmbo

    Timing is retarded ;-)

    Why?
  2. jimmbo

    Timing is retarded ;-)

    You would have to speak to the Manufacturer/Engineers, as they are the Ones who had their Reason(s) to change the Number.
  3. jimmbo

    Timing is retarded ;-)

    Latest Parts Lists usually show the updates
  4. jimmbo

    Timing is retarded ;-)

    That # has been discontinued and superseded to 77-8M6008208
  5. jimmbo

    Timing is retarded ;-)

    I have no Problem using a GM labeled part, provided it is the Correct Part. I have seen many 3rd Party Parts that while the part was a GM Part, and it looked Identical, it wasn't the Correct Part. Years ago it was the same when it came to Carbs and Distributors, some people's Attitude, "it looks...
  6. jimmbo

    Timing is retarded ;-)

    Was it a Genuine Mercury Part, or a 3rd Party(including GM) Part?
  7. jimmbo

    1989 Mercury 200 Black Max

    Have you checked the wiring for shorts to Ground? Have you unhooked the Sensors/Sending units to see of it quits?
  8. jimmbo

    Estate sale lot of 18 - 25hp motors - Compression gauge variables.

    Early 80 Saws, to me are practically Brand New. When you said Old, I figured you meant something pre 1950
  9. jimmbo

    Estate sale lot of 18 - 25hp motors - Compression gauge variables.

    Felt Air Cleaner? For the past 50 years I have seen nothing but Foam Filters on Chain Saws, so that one you are referring to, must be really old
  10. jimmbo

    Prop Selection - Bayliner 175

    I reread the Thread, I didn't see anything Insulting...
  11. jimmbo

    Estate sale lot of 18 - 25hp motors - Compression gauge variables.

    The Bearings would be gummed up real quick
  12. jimmbo

    Prop Selection - Bayliner 175

    Maybe you need to get a Prop with Vent Holes to improve the Hole Shot
  13. jimmbo

    Estate sale lot of 18 - 25hp motors - Compression gauge variables.

    A 2 Stroke Engine would not last very long if it were inhaling Wood Dust, and it wouldn't be Build Up in the Combustion Chamber that kills it
  14. jimmbo

    Estate sale lot of 18 - 25hp motors - Compression gauge variables.

    I think the only engines that had the Decompression Feature were the 57 - 59 35hp, and the 60 - 61 40hp
  15. jimmbo

    Estate sale lot of 18 - 25hp motors - Compression gauge variables.

    The 25s, have a different Cylinder Head from 18/20s, to make up for the Lower Piston Height in the 25. If someone stuck a 25hp head on an 18/20, then the Compression would be high enough to cause Detonation. But I doubt even that mismatch would have 200psi. Maybe with a very large Carbon Buildup...
  16. jimmbo

    What could cause this

    VRO didn't come out until 84 Only the Intake Side is scuffed/Scored, and the Exhaust Side is Fine?
  17. jimmbo

    Timing is retarded ;-)

    As other mentioned the module in the Distributor controls the Spark Advance. If it is pooched or is the wrong one(you don't know the Servicing/Repair History), the Timing Advance could be off(man I hate Electronics on engines. My I/O has a Distributor with good old fashioned Weights). That could...
  18. jimmbo

    Prop Selection - Bayliner 175

    There is a Check Valve in the Compression Gauge to allow the gauge to eventually measure the Max Pressure. If that valve wasn't there the Gauge would drop as the Piston descended. When the Gauge is connected the actual Compression Ratio drops a bit as the Gauge adds Volume to the Combustion...
  19. jimmbo

    Transom replacement or design flaw?

    People use those to buy time on a Fiberglass boat with a Rotted Transom "I think the boat is actually from the mid 90s. The reason I posted is because even with the 5hp outboard, I was getting a lot of transom flex. I don't want to replace the wood in the same configuration and end up with the...
  20. jimmbo

    Prop Selection - Bayliner 175

    Most V6 Outboard Props are the same as I/O Props If it is a dog and you are turning 5300, which above the RPM Range for that Engine, it is going to have even slower acceleration with greater pitch. 171, 182, 181,171 for compression Numbers? That engine has about 8.5:1 for a Compression Ratio...
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