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Old 05-04-2013, 22:20   #1
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starter motor 2qm20

I cant seem to get a win at the moment. After getting water in my cyclinders which I still have the head off I now have a problem with the starter.

I actually bought a new reconditioned one as I thought the old one had **** itself.

So I have a brand new battery bought today with 660 cca. I have brand new 220amp battery cables going to the starter. I have the positive hooked up to the positive on the battery and the other one hooked up to the negative on the battery. The negative one also has a cable that runs from the solenoid into the starter. When I put another positive cable to the ignition pole I can hear the switch throw the cog out but she doesnt turn. I have tried crossing the - and + at the solenoid to see if the motor will spin up and all I get is a tonne of sparks.....Buggered if I know what to do?

I have tried without the negative and also just tried grounding the negative on the block but then i get nothing.

Any suggestions?
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Old 05-04-2013, 22:33   #2
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Re: starter motor 2qm20

Negative going to the starter? That doesnt sound right.
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Old 05-04-2013, 22:48   #3
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Re: starter motor 2qm20

I am pretty sure thats how i had it before but i could be wrong. I thought positive travels through the solenoid and that wire from the solenoid to the starter completes the circuit?
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Old 05-04-2013, 22:53   #4
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Re: starter motor 2qm20

There is a post in SAIL magazine this month by Nigel Calder on rebuilding starter solenoids. Check the points. It can be a simple diagnosis and fix. Do you have a volt meter? Put it across the terminals on the solenoid. In a standard set up, it should read zero volts when the ignition switch is turn on.
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Old 05-04-2013, 22:55   #5
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Re: starter motor 2qm20

On my 2GM20F the positive goes to the starter and the starter goes to ground to complete the circuit.
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Old 05-04-2013, 23:04   #6
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Re: starter motor 2qm20

All sorted. Rather embarrasing and have prob spent 700 $ for nothing lol it didnt need the earth, the battery wasnt earthed properly to the chassis
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Old 05-04-2013, 23:06   #7
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Re: starter motor 2qm20

Oh well I have aspare starter now
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Old 05-04-2013, 23:23   #8
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Re: starter motor 2qm20

That's good. Here is the wiring schematic for my 2GM20F. Be advised, they do vary from boat to boat. This is for the earlier models with tach.

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Old 06-04-2013, 01:37   #9
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Re: starter motor 2qm20

excuse my ignorance, as I choke into my cornflakes, is a new/reco starter $700? I'm gonna have to start looking after mine...
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Old 06-04-2013, 02:17   #10
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Re: starter motor 2qm20

Thanks neo.

Charlie a reco is 600 and cost me 100 delivery. A new one from yanmar was 1200 without delivery!!!!
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Old 06-04-2013, 06:58   #11
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Re: starter motor 2qm20

Be afraid! Be very Afraid!!
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Old 06-04-2013, 07:11   #12
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Re: starter motor 2qm20

If you search for "broken piece in engine" it may help. I had a piece broken off the gear end bell and wedged in by the fly wheel. It started after replacing the starter on a 3GM. Good luck
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Old 06-04-2013, 07:16   #13
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Re: starter motor 2qm20

Glad you got it sorted, sorry it cost you so much.
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