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bharris6 
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Joined: April-13-2014 Location: Georgia Status: Offline Points: 26 |
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 Topic: Slow CrankPosted: May-27-2020 at 12:21am |
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I was able to get away and do some work on my 78 martinique this weekend on my quest to get this awesome boat to crank for the first time in 8 years.
A couple weeks ago I put a new battery, plugs and fuel filter and attempted to get it to start. I went to turn the key all I got was a very slow crank. I inspected the cables and noticed the positive cable had been spliced together. Very poorly I might add. So this weekend I replaced both positive and negative battery cables with #4 cable and had the same results. Battery is fully charged and new. When I turn the key switch to start the start rolls the engine over very slowly about 3 or 4 rations and stops. My question is #4 cable to small running from the battery all the way back to the starter? should I be running #2? I removed the starter to get tested, but didnt know if a auto parts store can test this starter since its marine and reverse rotation or would i be better off taking it to a marine shop? Thanks for the help. Boat has a chevy 198 in it. |
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MrMcD
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Joined: January-28-2014 Location: Folsom, CA Status: Offline Points: 3750 |
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Posted: May-27-2020 at 5:09am |
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I do not know how many feet your wire run is. The size of the wire needed is determined by the load and length of the run.
Since it has not run in 8 years the first thing I would do is try to turn the engine by hand. Put a 1/2 drive ratchet on the crankshaft harmonic balancer bolt and see how much effort is needed to turn the engine over. If it turns over normally either your wires are undersize or the starter is rusted up. A rusted starter can be taken apart and cleaned to work like new again. |
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: May-27-2020 at 7:38am |
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Bradley,
What did you get for a battery? Deep cycle or starting? |
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KENO
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Joined: June-06-2004 Location: United States Status: Offline Points: 11118 |
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Posted: May-27-2020 at 9:33am |
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What did the boat have for wire size originally?
You'd get better testing at an auto electric shop and could get the starter rebuilt there too if it was a starter problem. It's one of those expensive top mount rear entry starters on your engine (sounds kinda kinky) so at least getting it checked would be a good thing  |
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bharris6
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Joined: April-13-2014 Location: Georgia Status: Offline Points: 26 |
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Posted: May-27-2020 at 12:23pm |
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The battery cables before was a #4 on the negative and a combination of #4 and #2 on the positive. The battery was is a automotive cranking with 800 cca.
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: May-27-2020 at 3:06pm |
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Bradley,
As Ken mentioned, take the starter into an auto-electric shop for testing. There's a good chance that all it needs is a commutator clean up, possible brushes and bushings. In fact, you can do it yourself if inclined. |
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