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  1. Two_Stroke_Mike

    89 Mercury Classic 50 won’t open up

    I can assure you I'm not your average bear, I will figure this thing out eventually and post the results right here for everyone to see. Whether it is something I simply failed to do correctly or if I find a faulty component.
  2. Two_Stroke_Mike

    89 Mercury Classic 50 won’t open up

    Got another small update, slow progress is better than no progress ! I finally pulled the lower unit back off last night and checked to make sure that exhaust tuner wasn't plugged, and it appeared to be wide open. Pulled the carbs back off and installed the venturi in both of them, everything is...
  3. Two_Stroke_Mike

    89 Mercury Classic 50 won’t open up

    Well that was simply inexperience on my part. Which is why I am here, to learn and hopefully help others learn.
  4. Two_Stroke_Mike

    89 Mercury Classic 50 won’t open up

    @racerone, I have discovered another problem that may be at least partially contributing to this. Just wanted to give you credit for mentioning it. I was reading another forum thread where a guy had a similar problem with his classic 50 and you mentioned the boost venturi in the carbs. These are...
  5. Two_Stroke_Mike

    89 Mercury Classic 50 won’t open up

    Just a quick update, didn't get around to checking that max timing. Last night I double checked my firing with my timing light and revved on the engine this time, number 3 cylinder spark is cutting out briefly and coming back in. Looks like I may actually have an electrical problem after all. I...
  6. Two_Stroke_Mike

    89 Mercury Classic 50 won’t open up

    Thanks for clarifying that, much appreciated. I will do my best to check these things this afternoon and report back some results in the morning hopefully !
  7. Two_Stroke_Mike

    89 Mercury Classic 50 won’t open up

    I think I am following, there is a spec for advance for soon as the throttle butterflies start to move/open
  8. Two_Stroke_Mike

    89 Mercury Classic 50 won’t open up

    That is what I was thinking, since my throttle butterflies are fully closed, and I have a good cold and warm idle, idles perfect in gear, in the water, that should be about right. So when you said pickup timing, that's the point where the timing starts advancing correct ? I don't have a factory...
  9. Two_Stroke_Mike

    89 Mercury Classic 50 won’t open up

    I will see if I can find a different prop and give that a try also.
  10. Two_Stroke_Mike

    89 Mercury Classic 50 won’t open up

    From what I can tell the spark advance has an adjustable stop on it as well. I have not adjusted it at all, so it's still in the same position it was when I got the boat. The spark advance lands on its same stop regardless of how far the throttle stop is adjusted, unless I'm not understanding it...
  11. Two_Stroke_Mike

    89 Mercury Classic 50 won’t open up

    The prop is a 15p, numbers on it are as follows: 48 73140 A40L 15P. This is on a small 15 ft Glasstream fishing boat. I did actually replace the impeller, and changed the gear oil, but was not aware of an exhaust tuner. I will research that and figure out what it is. Thanks ! I am noticing a...
  12. Two_Stroke_Mike

    89 Mercury Classic 50 won’t open up

    I actually purchased this boat as a project to learn more about outboard engines. Previous owner said it would no longer get up on plane and go, he had messed with the carbs and was tired of trying to get it going. I figured a classic 50 would be a good one to learn from. First test drive seemed...
  13. Two_Stroke_Mike

    2000 Mercury 60hp Bigfoot 2 stroke worth building ?

    I have a 2 stroke 60hp carb oil injected Mercury Bigfoot that seems to be knocking. Would this be a good outboard motor to rebuild for experience building an outboard motor ?
  14. Two_Stroke_Mike

    89 Mercury Classic 50 won’t open up

    Fuel pump diaphragm is new, inspected. Not sure about the exhaust tuner ? If you are wanting my compression values they are as follows cyl 1-4 125 125 120 120
  15. Two_Stroke_Mike

    89 Mercury Classic 50 won’t open up

    Glad to be here with the community ! Admins thanks for the help with the confirmation email. I would like to learn more about outboard motors and how to diagnose them. I have a classic 50 that won’t seem to open up to full throttle. Carbs have been soaked, cleaned and built, both carb...
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