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  1. K

    No spark after points change

    I figured it out it was that I got new points and I put a little sandpaper to the points and sure enough when I open the points the test light on the negative side goes off when I close it it comes back on so basically what then points just needed was a couple little scrapes with the same sand...
  2. K

    No spark after points change

    1989, MerCruiser 3.74 cylinder. So I’m trying to remember because it’s been a while, but the engine was running a bit rough, and I ended up changing two carburetors that was just rebuilt by me and we’re running fine last year. So I said all right let me check the points which looked a little...
  3. K

    Electronic fuel pump.

    I want to add to the post above rather than edit it I’ll just put it here. Is it normal and I really don’t think it is for a boat to have constant power going to the starter relay with the key not in the ignition and is it normal for an alternator. They have power going to it with the key not in...
  4. K

    Electronic fuel pump.

    So I will reply as per message / I did do the oil pressure thing the problem is the rely has 2 large and 2 small connectors/ I choose the small one an dthe voltage is on 6 v to 7 volts not and the pump is 12. When I do a direct connect to the battery it pumps strong and fill the carb. On the...
  5. K

    Electronic fuel pump.

  6. K

    Electronic fuel pump.

    So last year I was having problems and I think I narrowed it down to the fuel pump. I heard a lot of these just last year or two on the cheaper brands. So I figured I’d get an electronic fuel pump. So what I did was I set it up with an oil pressure switch one to the relay on the left side and...
  7. K

    Fuel gauge not working

    I bought one (reed) and I am not too happy with it . It was accurate for 3 months and now all over the place.
  8. K

    Carburetor Compatibility Merc 2bbl 3.0 for my 3.7

    Carburetor compatibility with 1989 MerCruiser 3.7. I have many posts of problems for the past year and I feel like going to buy a new carburetor and I could resolve it once and for all. I am going to buy a new used Mecrusier 3.0 2bbl carb will it be OK on my 3.7 470? will it be enough? I am...
  9. K

    Dies when throttling up from idle after warm up/ 89 merc 3.7 2bbl

    Ok so what do I do? New fuel pump is bad put back the old one? I only change it because I thought it was the original problem
  10. K

    Dies when throttling up from idle after warm up/ 89 merc 3.7 2bbl

    OK final update hopefully someone can help me on this. The boat is running really well now what I have learned is you have to have the throttle down about 25% turn the key she fires right up awesome. The boat reacts to full throttle immediately no hesitation no bog at all. Explain this to me...
  11. K

    Dies when throttling up from idle after warm up/ 89 merc 3.7 2bbl

    So I have a new problem today I've been great for the last five days and then out of nowhere for some reason after running it for a good I don't know 20 minute run sit around 15 minutes another 20 minute run sit around 25 minutes on the third run it basically started to sputter and then it died...
  12. K

    Dies when throttling up from idle after warm up/ 89 merc 3.7 2bbl

    So I ran the boat for 25 minutes I shut it off I waited 10 minutes it started right up I mean right on the dime. None of this holding the key for 20 seconds none of this five attempts like before and then it finally ran. And now I know why when I did get it started I had to tap the throttle...
  13. K

    Dies when throttling up from idle after warm up/ 89 merc 3.7 2bbl

    OK maybe some good exciting news. So the only way I could start the boat as if I was wide open throttle on a regular start I noticed the flat for the child was complete you know almost closed as it should be. But I also noticed when I finally got the thing running as soon as I backed off and I...
  14. K

    Dies when throttling up from idle after warm up/ 89 merc 3.7 2bbl

    So what an interesting day on the water today. We started up no problem ran into a spot very very close by in case we had issues it would be along fell and uh after I stopped the boat which was only about 4 minutes of running we threw anchor we drifted after about 10 minutes I started it back up...
  15. K

    Dies when throttling up from idle after warm up/ 89 merc 3.7 2bbl

    Yea It was 5.36 volts...so it is working as it should. Another issue today was I went to replace my oil filter and it was empty NO WEIGHT and nothing drained out. The oil was golden brown yesterday and not stinks of gas.... Long story I will add to this..
  16. K

    Dies when throttling up from idle after warm up/ 89 merc 3.7 2bbl

    I have some new questions on my problem that I’m chasing. So I read that floats and should be at 3/8 I saw on a YouTube video that for the marine Rochester two barrel it should be one and 330 tI have some new questions on my problem that I’m chasing. So I read that floats and should be at 3/8 I...
  17. K

    Dies when throttling up from idle after warm up/ 89 merc 3.7 2bbl

    This may be it!!! How do I know the resistant wire color ? I like this idea.. So after the boat starts I need to test the voltage off the + side at idle and make sure it is under 12 .... if it is not do I buy a resistant wire? Where?
  18. K

    Dies when throttling up from idle after warm up/ 89 merc 3.7 2bbl

    Nola should I add a constant 12 volt wire to the coil direct from the battery as a test
  19. K

    Dies when throttling up from idle after warm up/ 89 merc 3.7 2bbl

    I found an old post same issue as mine I guess it common with no solution. https://forums.iboats.com/threads/engine-loses-power-after-20-minutes.713167/
  20. K

    Dies when throttling up from idle after warm up/ 89 merc 3.7 2bbl

    I did Noal the engine restarts for a few seconds that means there is spark. I adjusted the floats and air mixture. Rear cover was open 8 inches and another flap giving great venting All this and same symptoms . I now think reading other post similar issues it can be a weak spark causing a...
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