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    98 90 hp johson stalling under load still. unsure of next step.

    hi guys ive been having a problem with my 98 90 hp johnson this past summer and am now at a lose of what to try next. let me start by saying motor does run fine once underway. motor will start up and idle fine. the issue though is when I give it throttle it will stall. this problem is resolved...
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    98 90 hp Johnson only running when choked

    hey guys so I recently replaced my fuel pump because I had a problem with it dying under load. so the other day I tested the fuel pump and realized it wasn’t pumping fuel at all. So I replaced it with a new one. Go to run the boat today and at first it was running great no stalling no nothing...
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    1998 90 hp Johnson stalls and bogs in gear

    hey guys I have dual 98 90 hp Johnson’s that I have been having issues with the one motor . Serial number j90slecm on both. Problem I’ve been having is when I put the one motor in gear and give it gas it stalls, 80 precent of the time sometimes it runs fine. When it does run fine I can run it...
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    98 90 hp Johnson dies under load

    Hi guys I’m down the shore for the week and I’ve been having a problem with my motor. It’s a dual 1998 90 Johnson. The one motor runs like a top. The other one has been cutting out intermittently. First thing I noticed it would stall out. So I thought or think it was a fuel issue. One thing I...
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    Average speed for 22 mako with two 90 hps

    hi guys I have a 1973 22 mako with two 1998 90 hp Johnson’s 2 stroke on it. Had it out yeasterday with me my wife and her dad and got it up to 33 mph also full tank of gas. Just wondering if any body had any idea if this was average for the top speed ?
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    Mechanical fuel gague not working

    Hi guys I have a 22 foot 1973 mako. I had to replace the old mechanical fuel gague I did that but the new one isn’t reading. The new gague I got didn’t fit excatley so I had to bend the float rod a little to make it fit down the tube to the gas tank. With that in mind I was able to get the gague...
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    1973 mako direct sight fuel gauge

    hey guys I have a 1973 22” mako center console. I’m trying to track down a replacement direct sight fuel gauge. I called mako, or whoever owns that name now, they don’t have any information on something that old. I tried a website classic mako and they don’t have anything either. My question is...
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    4.3 mercrusier compression test :(

    Hi guys today I did a compression test. First one I have ever done so I’m not so sure I did it right but it seems pretty staring forward. Only thing I was unsure of was pulling the spark plugs. I pulled one at a time and tested that cylinder with the Remainder spark plugs in place. Also I...
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    4.3 still no start

    Hi guys I still looking to solve my no start problem. Long story short I have a 1990 4.3 mercrusier, or so I think, that is not giving spark and Turning over. I think I have rulled out the ingnition coil as the culprit by bench testing it. I have also replaced the point and condensor in the...
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    How to set point gap ?? 4.3 mercrusier

    Hi guys so I’m having trouble setting the point gap. Long story short I hope determined my not start issue is related to my points being worn and rusted. Since then I have cleaned to plate and installed new condenser and points. The problem I’m having is adjusting the gap. I think from what I...
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    4.3 mercrusier crank no start

    hi guys trying to open the boat for the season. Charged the batteries and to start and it is just cranking. Checked and im getting fuel from the carb so i dont think its a fuel issue, for now... anyway, next I figured it might be an ingnition problem. So i pull a few spark plugs and i get no...
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    No start solenoid click 90 4.3 mercrusier

    Hi guys so I was getting ready to finally finish winterizing my boat and I go to start it and I get a ?click? at the slave solenoid, weird cause like 2 weeks ago I had it running. In any case, I test the slave solinoid posts with a test light. So the one post with the red constant power works...
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    Bursting power steering lines

    Leaking power steering valve guide / actuator Hi guys so I got a question. I noticed the other day that my valve guide around my power steering actuator was leaking. So I tightened it up. I also noticed that the power steering pressure line was leaking a little so I tightened that up also. Run...
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    Leaking trim need help identifying this part

    Hi guys looking for help to identify what this part is ? Back story- I was adjusting my trim tabs the other day and heard a weird noise look a :squish: look in the back while my wife was moving the tab around and saw hydroic fluid leaking out of this part. It only leaks when I use the trim tabs...
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    How to set timing

    Hi guys got my distributor in and got the motor running but I need to set the timing ? Never done this before so I'm looking for a walk through on how to do it. It's a 1990 4.3 thunderbolt IV ignition.
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    Which mark is 0 degrees :with pic :

    Hi guys I'm trying to put my distributor back in and I'm having trouble finding 0 degrees on this timing marker due to it being old and rusty. I sanded it down a little to see if there was any writing on it but couldn't find any. Any help would be much appreciated thanks I've attached a pic of...
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    Adhesive to hold intake manifold gasket in Place

    Hi guys looking for some advice I'm in the process of putting back on my intake manifold on my 1990 4.3 mercrusier. But, the new gasket keeps moving it won't sit properly when I put the manifold in place. This is very frustrating. Does anybody know if i can use any type of adhesive to hold the...
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    how to reinstall intake manifold

    hey all lookign for some advice on how to reinstall my intake manifold. I just a little confused on the sealents that are supposded to be used. i know one is supposed to be used along the metal rail that the manifold sits on just curiious of the name and brand i should get. also do i use a...
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    1990 mercruiser 4.3 bad intake manifold with pics

    Hi guys recently pulled my intake manifold off due to an overheating issue. When I pulled them off I noticed quite a bit of rust on the inside. Looking for some advice as to what this can mean ? I'm not to sure if the pervious owner had a leak inside but from the looks of it he did. Thanks in...
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    Reinstalling distributor 4.3 mercruiser

    Hi guys quick question I have it pull my intake manifold off. Just wondering how you go about reinstalling the distributor ? On my 1990 4.3 merch. If I'm not replacing it just literally taking it off and moving it out of the way and reusing the same one. Can I just do that? Take it off move...
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