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Old 09-05-2021, 10:50 PM   #1
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Default Slow cranking

We have a 1992 2300 SCR 5.7 Mercruiser. Batteries a new and good. When I try to start her, she turns over slowly and won't fire. It is not cranking slow like a dead battery slow, just like only 1/2 the speed it should. Eventually it will fire and go. After we have run her, she still turns slow, but fires quicker. Ideas? Fixes? I am sure someone has had the same problem that why I love these forums!
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Old 09-05-2021, 11:28 PM   #2
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What’s the voltage at the starter while cranking? Possible issues lose or corroded battery cables, check both ends of the positive and negative cables. Worn battery switch causing a voltage drop is another possible source. Lastly a bad starter.
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1997 2400 SCR
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Old 09-12-2021, 05:43 PM   #3
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thanks for the input Mike! Haven't been online for a bit.
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