marine solenoid vs auto solenoid

Cptkid570

Ensign
Joined
Oct 18, 2005
Messages
967
Hey everyone,
I really hate to start another "auto part vs marine part" thread, but I do have a question concerning the starter solenoid (the solenoid that mounts to the top of the starter).

Is there a difference between the marine solenoid and auto solenoid?

Here is why I ask -- I bought a brand new starter for my boat. Like an idiot, I overtightened the larger nut on the solenoid when attaching the battery cable to it and the stud broke out of the plastic housing.

So, I bought another solenoid (marine solenoid). Well, the solenoid I bought is bad, the contacts stick and the starter keeps running even after the boat starts -- when the starter turns enough to start and doesn't chatter.

To make sure it was a bad solenoid and not the ignition switch or something, I put a spare auto solenoid that I had sitting around onto the starter and tried it. And the starter works beautifully with the auto solenoid.

I couldn't just return the new solenoid that easily because I bought it mail order, so I have to mail it back. Now, I don't trust the solenoids from the place I bought it because I got a bad one.

Opinions?
 

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: marine solenoid vs auto solenoid

Get a proper marine solenoid. Aftermarket (cheap) or OEM is up to you. Just get a marine part.
 

Cptkid570

Ensign
Joined
Oct 18, 2005
Messages
967
Re: marine solenoid vs auto solenoid

I do intend on putting a marine solenoid on it. When I return my bad one, I will be given a good one. It all just got me thinking and wondering what the difference is between the two.
 

Limited-Time

Vice Admiral
Joined
Mar 30, 2005
Messages
5,820
Re: marine solenoid vs auto solenoid

From what I can tell by disassembling a "marine solenoid" the only difference is a sealing compound. I have reworked several solenoids after replacing them.
 
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