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Jeremy R
Jeremy R, Technician
Category: Small Engine
Satisfied Customers: 9019
Experience:  20+ years experience. Factory trained and certified
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I have aPerkins 4 107 in my boat I have fitted a new control

Customer Question

Hi, I have aPerkins 4 107 in my boat I have fitted a new control panel and a new alternator and wired everything as described in the instructions. I now get a stort when I try to start the engine and if I keep it switched on it the wire from the ign to the solenoid heats up.
I have disconnected everything now and had the starter checked along with the solenoid they are both ok. The started is a non insulated type is there any way of getting it to work without buying the insulated type at £388.00?
Submitted: 1 year ago.
Category: Small Engine
Expert:  Jeremy R replied 1 year ago.
There's no way to get that starter to be what it's not.
The reason the other starter is so expensive is because it's explosion proof.
That's very important in a boat application.

The alternator needs to also be the specific alternator for that marine engine.
The solenoid sounds like it's wired wrong.
If it has 2 small posts. one is battery voltage from the key one is ground.
Customer: replied 1 year ago.

The solenoid has three terminals one from the battery to the alternator and supply to the control panel. Two is the feed to the starter from the ign. Three is a small terminal which is an earth to the engine block.

Have I got this wrong????

Expert:  Jeremy R replied 1 year ago.
Yes. sort of.
One is from battery with alternator also.
One is feed to starter and that's it.
Small one is signal from start button/key switch.
If there were 2 small ones. One would be ground one would be from key switch.
Since there is only one, that determines that the solenoid is grounded through itself to whatever it's bolted to.
Customer: replied 1 year ago.
Ok so I need to use the small terminal as a feed from the ign switch?
I'll try that an see what happens
Thank you.
Expert:  Jeremy R replied 1 year ago.
You got it!

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