Recent content by Dhott

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    Strange voltage issue on 2007 135 optimax???

    Sorry. With the motor running I get 14+ at the battery and alternator. With the motor off, I get 12.7. That system seems to be performing correctly but for some reason it seems like the ecm is only getting around 12.6-12.7 while running
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    Strange voltage issue on 2007 135 optimax???

    Hey guys and gals I’ve posted on here before so please refer to that thread for more detailed backstory. Long story short, I blew my original powerhead about a year and a half ago and got it replaced with a fully dressed powerhead but I’m still using my old ecm. Ever since the new powerhead was...
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    Please help! 2007 optimax 150 problems

    Hey i know it’s been a while. I think I’m making some progress. I’ve now replaced three coils. It runs a lot better all around. Still have a slight cough at idle and doing a drop test the cough is still there with any of the cylinders unplugged so I think it’s something that’s affecting the...
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    Please help! 2007 optimax 150 problems

    Also since it’s not the original powerhead the serial number on the transom bracket isn’t the correct one. I’m having trouble finding a serial number on the actual powerhead
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    Please help! 2007 optimax 150 problems

    I just ran the boat with a new coil on cylinder 1. Ran MUCH better. Still a little rough at idle though but gained some top end rpm and felt like it just had a lot more get up and go. I think the cylinder 1coil was totally shot and there might be another coil on its way out. Do you know how to...
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    Please help! 2007 optimax 150 problems

    So I did a drop test on injectors and coils. Cylinder 1 didn’t change much when I disconnected the injector. Swapped 1 and 2 injectors and it still didn’t change much when I disconnected cylinder 1 injector. I then disconnected coils and cylinder 1 coil didn’t really change how it was running at...
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    Please help! 2007 optimax 150 problems

    The only place I can run the motor is on the water and I’m going to be on the water a lot this weekend so if you can think of anything I should test please let me know. I got the reading of the pressure in my garage and it held steady at 10psi. Maybe after I run it the diaphragm heats up and...
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    Please help! 2007 optimax 150 problems

    Actually no reason for a video. Just tested the pressure again and it held right at 10 for several minutes. The needle never moved at all and I eventually just unhooked it
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    Please help! 2007 optimax 150 problems

    I’ll get a better video of that here in a little bit. What would you consider a while? And would it be a leaking air or fuel injector?
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    Please help! 2007 optimax 150 problems

    Thanks I was wondering about that. I also thought it was strange how fast the pressure drops after the high pressure pump shuts off when turning the key. At the very end of the video
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    Please help! 2007 optimax 150 problems

    By the way as soon as I press the air schrader valve the engine dies. Should I be able to press the valve and the motor will keep running?
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    Please help! 2007 optimax 150 problems

    The plugs all look the same to me ever since fixing the bad coil I had.
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    Please help! 2007 optimax 150 problems

    Thanks a lot. Here are videos of the air and fuel pressures. Do they look right to you?
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    Please help! 2007 optimax 150 problems

    Thanks for the help! My particular engine doesn’t have the normal air pressure regulator. I think mine is the version 2 or something like that. It doesn’t have the diaphragm or spring like the fuel regulator or tracker valve. I have the fuel and air regulators on the port rail and the tracker...
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    Please help! 2007 optimax 150 problems

    I should give you some more information. I put new plugs in it. Checked the tracker diaphragm and fuel regulator diaphragm. I didn’t see any tears or holes in the diaphragms but the fuel regulator diaphragm was a little deformed. I checked air/fuel pressures and they looked to be right on at...
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