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I have a 1987 Onan MDL4 generator that I've been trying to test the shutdowns on it. Specifically the low oil pressure, high coolant temp, high exhaust temp shutdowns. I was only able to find a 12V wiring schematic (my generator is 32V) which seems to show each of these sensors as normally open...

I recently had a new exhaust riser manufactured for my Onan MDL4 generator. I had the old exhaust temperature sensor mount reattached to the new manifold. Now I'm in the hunt for the correct temperature sensor device to attach to the manifold. Does anyone happen to have a part number or...

I’m heading into Gloucester, MA today and thought I’d top off. With all the commercial boats there I’m guessing it’s a good place to purchase fuel. Can anyone recommend a specific fuel dock? Thanks.

My 1987 Onan 20kw generator just recently started to leak a little oil. It seems like it is coming out between the engine and the electrical side of the generator, from the wire guard on the bottom. It's not much but it's enough that after running the generator overnight I have to wipe it up...

Can anyone tell me the fuel capacity of the fwd and aft tanks on a 63' CPMY. Asking for a friend. :) Thanks.

I’ve had a difficult time keeping the square fuel filter housing connections from leaking on my Onan generator. No matter how tight I get them they still drip a bit after a while. I’m hoping someone can recommend a replacement filter like a small spin on canister type that I could put in place...

I’ve had my heat exchanger serviced for my MDL4 Onan generator and now it’s time to reinstall. I was given the gaskets that are necessary between the block and the exchange (4 of them), as well as the gasket between the heat exchanger and the riser. The original gasket between the block and the...

I'm removing an old Furuno radar and replacing it with a Garmin. My Garmin chartplotters of course run on 12V. The Garmin radar has a power input range of 10.5-35 VDC. I have a 32V power feed on the flybridge from the removal of the Furuno but I don't have a 12V feed there. I'd like to feed...

I'm pretty certain my port engine alternator is not working. I'd like to verify it's the alternator by testing output directly at the alternator. Can anyone tell me which leads I should be checking to get the 35 ish volts? I'm guessing the leads marked 1 and 2, then move to 1 and 4. Also not...

I know it's a long shot, but does anyone happen to know where I might find a new or used 32V starter for my Onan.

My 1987 20kw Onan (32V) generator occasionally "grinds" when the starter tries to engage. I of course stop trying to start it immediately then try again. Most times it then fires off fine. The original starter (32V) was replaced by the prior owner with a 24V starter since I understand the 32V...

Trying to determine whether or not my 1987 Onan generator has any zincs in it. From other posting it seems some do and some don't. I think mine may have two. Can anyone confirm? I've circled what I think are where the pencil zincs could be. Before I crank one off and screw something up I'd...

I'm in search of a three or four step ladder like this one. Anybody know where I might find a used one?

One of my trim tabs is stuck in the down position and I need it to be in the up position quickly. I’m on the hard and need to have it up to replace an actuator. I’m in search of a quick fix like swapping some wires to get it raised. The starboard tab works fine. When pushing the port tab rocker...

This outlet is on my flybridge. I was expecting a standard receptacle and found this. Anybody know what it's for? I haven't checked the voltage yet but I think I can read 125V on the face.

I recently bought a new boat. It has turbos and I'm already missing my 871N's.... Anyway, after a four day trip I noticed an oil leak. It is coming from the hot side of one of the turbos. There is no oil leaking around the oil lines between the hot and cold side of the turbos. It's just on...

I'm having a bow thruster added to my 1987 63' CPMY. In the bilge area below the floor in the forward stateroom there are components of the vacuflush toilet system. I'm trying to have that area ready for the bow thruster install and I'm afraid those components may be in the way. Unfortunately...

I don't have a fresh water washdown on the bow area of my boat. I'd like to add a spigot or hose bib connection of some type so I can easily attach a hose when needed. I'm looking for ideas of what to use. I think it can be located on a vertical surface where the platform is for the front...

I just purchased a new boat, 1987 63' CPMY, with an original Onan generator, MDL4. Unfortunately the seller is deceased so I have no information source from him. I'm wanting to make sure I'm starting the generator properly. The start / stop rocker switch on the generator itself appears to be...

I've owned my 53' for over 15 years now and have thoroughly enjoyed it. It's time to go a bit bigger and get a cockpit too. I've been keeping watch over Yachtworld but haven't seen anything of interest lately. If any of you have a 63' that you are considering selling or know of one out there...