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  1. J

    2002 Mercury 90 4-stroke Will Not Run

    Fuses okay. Pretty much convinced there's not enough vacuum draw through the carburetor throats. If I completely block the carburetor throats, I will get fuel coming out the front of the carburetors resulting in a flooded engine that will start and run for a bit. If the source of the vacuum is...
  2. J

    2002 Mercury 90 4-stroke Will Not Run

    Hi. Hope all is well with you. I am working on a 2002, 90 hp, 4-stroke, in-line-4 that has been sitting for a while. Here's where I am: Compression: top-to-bottom: 180, 140, 140, 125. Yes. I know. Wouldn't it still run albeit never again at 90 hp ...? Spark: jumps 1/4 inch air gap...
  3. J

    Honda BFP60A Will Not Go Down

    Hi. The tilt on a 60 hp Honda, model BFP60A, will not move. I used the boat last week and lifted the engine at the dock. Went to use it yesterday and the engine will not move. It won't try to move in either direction. I'll be going back to try to manually lower the engine. Anything else I...
  4. J

    1997 Force 120 Idle Will Not Settle Down

    Got back to the boat. Visually it didn't look like the butterflies were open but when I released the carburetor linkage the bottom throttle relaxed to full close and the throttle cam follower went right home making contact with the cam. Perfect! Revs settled right down and cam follower position...
  5. J

    No spark on 2 of 4 cylinders

    Yes! The red stator. Upgrade or cost-down ... "you decide". lol Check the resistance across those leads. Other coil tests look for resistance values that are neither shorts nor opens. I dont know spec values but you can at least determine if you have these conditions to be questioned. J
  6. J

    No spark on 2 of 4 cylinders

    The blues must be working if you have spark. That's the stator coils feeding voltage to the switch box to be rectified and built up for firing. I think you're gonna have to open and try the CDI switch box. The pencil case must be an upgrade. I really do not know how it works. Are there 3...
  7. J

    1997 Force 120 Idle Will Not Settle Down

    Thank you. There is a good chance that a throttle butterfly is open more than it should be. I'll have a look. J
  8. J

    1960 15032

    Yes. Check fuel pump. Disconnect line from pump to carburetor. Wrap pump exit with rag. Turn over engine. Do not start. Just turn it over. Fuel should be pumped into rag with engine rotation, not weeping, nice spurting. The fuel pump's job is to try to flood the carburetor. The...
  9. J

    Water Pump Housing Not Machined... This is hard to believe.

    Crosbyman, I got you. Thanks for the leroy's info. I've never looked up specs for this engine but I kind of understood they run at lower numbers. Thanks for the values in print. Helps my confidence! This little unit does hum. It does sound tight. Shy one, though. It took condensers, a...
  10. J

    Water Pump Housing Not Machined... This is hard to believe.

    Yes, indeed. This is not the original cover. Too bad. It cost this guy his engine. Quite lucky the pistons aren't trashed. I'm gonna have to go back to him and ask if he remembers where he got this from. Probably supposed to look more like this. J
  11. J

    No spark on 2 of 4 cylinders

    Completely confirmed with new trigger assembly. All 4 firing now. J
  12. J

    Water Pump Housing Not Machined... This is hard to believe.

    A friend gave me his 1965 Johnson, 9.5, MQ 11. Says he's tired of dealing with it. Can't figure out what's wrong. He put it up several years. No other information other than it is junk to him. Every subsystem on this thing needs help. I gave it new condensers, spark plugs, head gasket...
  13. J

    1989 115hp L6 carb no response to idle screw adjustments

    Timing done with a light? Confirm ignition on all cylinders. Are the bottom 2 leaking spark? Check at night in the dark. Clogged idle jet could hurt idle to midrange but high speed should run. Could be a stuck needle valve in lower carb. Does the carb have a drain plug you can open to see if...
  14. J

    1997 Sears Gamefisher 9.9 2 stroke won’t start

    If there's a chance of overheating check compression first. You want to be sure your cylinder health is good before spending $$. Spark should jump a 3/8" air gap. Spark on both? Then manually add premix fuel into carburetor. You may have to pull a few times since manually adding fuel may...
  15. J

    Piston Rings Top vs. Bottom

    Thank you, J
  16. J

    Piston Rings Top vs. Bottom

    Genuine Mercury 831255A6
  17. J

    1997 Force 120 Idle Will Not Settle Down

    1997 Force 120 ELPT, 4 cylinder, 2 stroke, serial 0E277049. When coming off high speed and throttle lever is pulled to neutral, the engine drops revs normally but reaches a point where it will not come down to a quiet, shifting idle speed. Linkages all respond, throttle cam is in correct...
  18. J

    1980 50 hp 4 Cylinder, Bottom Two Dead

    Not that anyone's interested, but, ... Yes. Yes, it does mean a bad trigger. Verified with spec resistance measurements. wht/blk to brn OR wht to vio should measure 700 - 1k ohms. I've got an open circuit in one of my pairs. J
  19. J

    Piston Rings Top vs. Bottom

    Got this out on another thread with no results. Received a set of rings for a 3 cylinder. 6 rings at 2 per piston. All 6 rings are tapered to what appear to be the same dimensions. 3 are black, completely black, probably from heat treat. 3 are black with the outer edge exposed in silver. Is...
  20. J

    No spark on 2 of 4 cylinders

    With type V ignition, I've verified my problem is a bad trigger. Spec values of resistance between trigger leads, wht/blk to brn OR wht to vio, should be 700 to 1k ohms. One of mine is 830+, nice, the other is an open circuit. Bad trigger assembly. J
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