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    Fluid Reservoir identification

    Thanks for the response, I’m clear on the cooling system, I just wanted to clarify that I was not talking about the pan, the fill resavoir Is located on the transom. I’m trying to identify this resavoir, see circled pic for reference
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    Fluid Reservoir identification

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    Mercruser 3.7 488 wiring help

    I got the main engine harness hooked up and it appears to be working as im getting the signal from the trim. As the gas tank is currently out of the boat, the fuel which was originally on full went to empty. The other gauges are all at "zero" because the motor is dry (no fluids), i will be...
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    Mercruser 3.7 488 wiring help

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    Fluid Reservoir identification

    Alrighty folks, I have another novice question for this 488 3.7 mercruiser. What is the fluid reservoir for that sits right behind the top flywheel and in front of the oil pan. Im used to dealing with outboards so this set up is a bit new to me. I have looked at many engine diagrams but have...
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    Speedo connection point Mercruiser 411 with gen 1 drive

    Ok thanks for the info, the pitot which is on the boat is trash and needs to be replaced anyway, I was not sure if that was the connection point.
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    Speedo connection point Mercruiser 411 with gen 1 drive

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    Speedo connection point Mercruiser 411 with gen 1 drive

    My boat has an old school Mercruiser 488 in it with a first gen outdrive. It’s the one that has the oil plug on the left side. I’m in the process of restoring the boat and when I was tracing the Speedo tube, I noticed that it was cut about half way to the motor. I have looked everywhere for the...
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    Mercruiser 488 with alpha drive gen 1

    My boat has an old school Mercruiser 488 in it with a first gen outdrive. It’s the one that has the oil plug on the left side. I’m in the process of restoring the boat and when I was tracing the Speedo tube, I noticed that it was cut about half way to the motor. I have looked everywhere for the...
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    Mercruser 3.7 488 wiring help

    I’m pretty sure I figured everything out, I’m going to reinstall the gauges and harness tomorrow and see how it goes
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    Mercruser 3.7 488 wiring help

    Ok so that harness is still connected to the boat this is an additional harness that runs from the engine to the console area.
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    Mercruser 3.7 488 wiring help

    So I know the first one now of for the Speedo, still need help with the rest
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    Mercruser 3.7 488 wiring help

    I inherited a 93 Petit Manan bow rider which I am in the process of restoring. The boat itself is in pretty good shape, but the electrical is a mess. When I got the boat the main engine harness was cut along with the harness running from the trim/tilt to the throttle. The throttle and trim/tilt...
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    Mercruiser 3.0 Sputtering at idle and low speed

    I bought a 98 Sylvan runabout with a Mercruiser 3.0 Aplha 1 on it about a month ago, I had it out on the lake 15-20 hours and everything has worked perfectly. Yesterday on the lake, the engine began sputtering and knocking like it was starving for gas and would cut off at low speed or idle, it...
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    plug question

    I have a 98 sylvan v1800... should the screw plug go on the inside or the outside this is the first time i have owned a boat with a screw plug
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    Starter question mercruiser 3.0 alpha one gen 2

    I have a bad starter on my mercruiser 3.0, the current starter does not have the 90 amp fuse which I’ve seen in most diagrams. I’m replacing the starter should I get the fuse as well. The starter and the fuse are for a 95 bayloner capri? This boat was bought with. Bad starter the fuse was not on...
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    Trim pump question

    I had to change my trim pumps Solenoids both upper and lower. Other then the clicking from the bad solenoids the pump works fine and responded well to the control lever. Now that it’s reinstalled I’m not getting any response from the control box/ lever. I ran a pair of jumper cables from the...
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    50 amp circuit breaker question

    I recently purchased a new 50 amp circuit breaker for my mercruiser 3.0. I’m rebuilding this engine and I’m new to this type of breaker. I took the breaker out of the box and I attempted to push the button in before I connected the wires. My understanding is that you are supposed to push the...
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    Mercruiser 3.0 won’t fire

    I have a mercruiser 3.0 alpha one I recently bought for a project. When I bought the boat the previous owner did not have the key so i replaced the ignition switch thinking I could test the motor and installed a new battery. The ignition was installed properly and the battery is fully charged...
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