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Old 07-08-2017, 02:44 PM   #1
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So I've gone to the boat today, been stood 2 weeks.
Gone to start her and she was turning over.
Then nothing?
All the dials move, I've put a screwdriver accross the starter and it spins but when I turn the key there is no starting?
Any ideas?
I thought it could be the neutral micro switch but it's only a guess?
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Old 07-08-2017, 02:55 PM   #2
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So was cranking but then stopped, now nothing, correct?

There is a 20 amp fuse under the helm for the ignition. Verify the B terminal has 12 V.

If good verify the I terminal has 12 V with the key in the run position.

Finally verify the S terminal has 12 V when the key is in the start position.

If all good verify the slave soleniod is getting 12 V to the coil terminal, small one. The other small terminal is ground. Then verify the large terminals have 12V when cranking.
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Old 07-08-2017, 02:56 PM   #3
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Forgot to ask when you jumped the starter and it spun was it turning the engine over?
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Old 07-08-2017, 05:26 PM   #4
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Hi Mike

No it just spun but it's a new starter this season
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Old 07-08-2017, 09:53 PM   #5
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Steve let me know the results of checking for voltage as I defined in post 2.
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Old 07-09-2017, 01:04 AM   #6
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Steve,
Buddy of mine had about the same symptoms a couple of years ago. The ignition coil was the cause. Cheapest fix he has has on a Mercruiser...$35.
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Old 07-09-2017, 01:10 PM   #7
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Quote:
Originally Posted by MAXUM2500SE View Post
Steve,
Buddy of mine had about the same symptoms a couple of years ago. The ignition coil was the cause. Cheapest fix he has has on a Mercruiser...$35.
Steve said his engine is not cranking over, the coil has nothing to do with the cranking circuit.
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Old 07-09-2017, 03:15 PM   #8
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Try rotating the engine a little bit by hand. You may have a dead spot in the fly wheel.
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Old 07-09-2017, 05:55 PM   #9
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Mike

I'm going to the marina tommorow is the fuse a tube one or a bayonet type?
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Old 07-09-2017, 09:55 PM   #10
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Tube that is in the harness not the fuse panel. If you have 12V on the B terminal of the ignition switch the fuse is good.

B stands for battery
I stands for ignition
S stands for start

On the ignition switch
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