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    Troubleshooting engine temp

    I pulled the thermostat, it's pretty rusted and seems seized up although i don't really have a good idea of how it's supposed to behave in my hand if I try to move it.
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    Troubleshooting engine temp

    Next up on my list of things to fix, the temperature gauge, or thermostat? I used an ohm meter to verify the temperature sender is working. My temp gauge on the dash never goes above 100. Used a laser thermometer on the engine body and after ten minutes of idling the hottest spot I can find...
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    Minor shudders at idle

    The timing was at 12 BTDC so now it's at 8. No real difference in the behavior seen in the video. So you would suggest valve adjustment next. That's a little intimidating. Any advice on that job? I have a brand new carb from National carburetor sitting in a box. Just trying to decide...
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    1992 Trophy not advancing spark

    Can you check timing advance on muffs? I would think running at 3000 RPM on muffs is a bad idea.
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    Minor shudders at idle

    Last week I replaced points, condenser, set the gap and adjusted with dwell meter, replaced wires, cap, rotor and spark plugs (and set the gap on those as well per the engine specs). I have never done valve adjustments, so I am not sure how complicated that is.
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    Minor shudders at idle

    That's good to know, what do you make of my engine's behavior in my video? Any cause for concern? I really want to get the boat in the water and have some fun.
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    Minor shudders at idle

    Thanks, what do you mean by an adjustment problem?
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    Minor shudders at idle

    I did, it has 160 psi on all four cylinders Should I also do the vacuum gauge?
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    Minor shudders at idle

    Hi, I've got a 3.0L with points ignition. I've got my engine idling at around 600 RPM in the video below. It has a few shudders and rattles a little and I'm not sure if this is normal or what I can do.. I'd really like the engine to idle still and without the rattles. At higher RPM it smooths...
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    Correct RPM for setting timing on muffs

    I just push the "throttle" button at the base of my throttle arm so the propeller isn't engaged but then I guess that's not the same thing as in gear. I found the instructions in the manual but they're kind of confusing. With boat in open water, place remote control in forward gear, idle...
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    Correct RPM for setting timing on muffs

    Possibly a dumb question, is that idle in gear or neutral? I'm a little unclear on exactly what is meant by "idle".
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    Multimeter tach reads RPMs too high

    Thanks. At this point I'm less concerned about the high idle than I am about getting an accurate read on the RPMs. I will make sure to check that though.
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    Multimeter tach reads RPMs too high

    the dashboard tach reads even higher like 3000. It's relatively stable.
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    Multimeter tach reads RPMs too high

    Thanks I'll try the app.
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    Multimeter tach reads RPMs too high

    I've been doing some reading and found that some engines have a "wasted spark" - that is they spark on both compression and exhaust. Does this points ignition do that?
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    Mercruiser 3.0 diagnosis / serial number decode

    If you end up sending it back I've heard lots of great things about National Carburetor out of Jacksonville, FL
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    Multimeter tach reads RPMs too high

    It reads waaay too high. It's on my list to fix.
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    Multimeter tach reads RPMs too high

    The instructions say to connect to negative on the coil.
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    Multimeter tach reads RPMs too high

    I purchased an Actron CP7677 automotive multimeter. Hooked up red lead to negative side of coil, black to ground. Set the dial to 4 cylinder. With the engine idling it says my RPMs are ~2500. I know my engine is idling faster then it should but I also know it's no where near that fast. The...
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    Check my work please - setting idle screw back to preliminary setting on a 3.0

    Here's a video I made.. 50 seconds long. Have a watch and let me know if I have this right. Thanks! https://photos.app.goo.gl/LM8sayeomjQWGu8B8
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