Motor turns over slow sometimes

ah heck

Cadet
Joined
Jun 26, 2007
Messages
16
I have a 1991 Force 150 hp OB. It runs fine when started but it seems to turn over real slow sometimes like the battery is low and then you can try it a few times and it will start right up. Sometimes you have to turn the isolator switch to all to get it to crank over and start. Does anyone have any ideas or suggestions as to what is the problem.
 

bowhuntrrl

Petty Officer 1st Class
Joined
Mar 26, 2003
Messages
320
Re: Motor turns over slow sometimes

Probably worn brushes in the starter motor. Might be a good time to take it out and have it checked and possibly rebuilt if it tests with too much draw. A lot of auto parts stores will test a starter for excess current draw for free.
 

roscoe

Supreme Mariner
Joined
Oct 30, 2002
Messages
21,753
Re: Motor turns over slow sometimes

Remove, clean, reconnect and tighten all battery and ground cables.
 

Bry21317

Chief Petty Officer
Joined
Apr 9, 2002
Messages
552
Re: Motor turns over slow sometimes

Take the batteries to a shop and make sure neither one have a Dead Cell. I had this exact problem last summer on my Force 125, it was a real pain. I even replaced the starter thinking that was it, but it was the batteries. The batteries were both new and one had a dead cell and was bringing both of them down.

Thats what I would try. Another way to test is to remove one battery copletely, from the switch, and test with one. Then if that still does the same, unhook the one you just tested, then try the other. If one makes it spin faster you know the other one is going bad.

Its a real pain I know, as that was the last thing I thought it was, as I had power, but sure enough a dead cell in the battery will get you. Trust me I went round and round with this last year for about 2 weeks, until I gave in and took the batteries to get them tested and sure enough under load one had a bad cell. Put the new ones in and bam, the starter was flying again.

Bryan
 

cobra120

Cadet
Joined
Jul 28, 2007
Messages
8
Re: Motor turns over slow sometimes

hi i was having problem with mine turning over very slow with a new hot battery but mine was not starting. after playing with it a week found it was not grounded out good i ran another ground wire from battery to my head. problem was solved:D
 
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