1997 Force 120 - Wont overcome compression starting

Joined
Feb 17, 2012
Messages
2,906
Re: 1997 Force 120 - Wont overcome compression starting

6.5v on solinoid is either a real bad cable or a bad battery. Have the battery load tested if possible because that is a major drop to the point that if the cable was that bad i would have expected smoke. Im sry i dont know the best place to buy leads.
 

fishngolf

Petty Officer 3rd Class
Joined
Aug 23, 2012
Messages
84
Re: 1997 Force 120 - Wont overcome compression starting

The cable wasn't smoking but the negative cable was extremely hot. I did also run jumper cables in parallel but had the same result.
 
Joined
Feb 17, 2012
Messages
2,906
Re: 1997 Force 120 - Wont overcome compression starting

did you clean both ends of the negative cable including where the neg bolts to the motor (the metal behind the bolt). you have to remove the negative lead and clean the area it is bolted against as thats a spot that most people miss cleaning.

they can test the battery for free at any autoparts store just ask them to load test it for you. (they put a large load like 400amps on the battery and read the voltage to tell if its good)

volts and amps are tied together so 100amps at 12v is 200amps at 6v. If a battery is bad and drops voltage under load then you starter instead of pulling 150amps may pull 300amps and the cables can not carry that much so they become hot. If the battery is good and putting out 150 amps but the cables have hi resistance then theres a voltage and amp drop at the starter as the cables converted power to heat. Thats one reason its good to know the battery voltage at cranking but as the starter is on holiday then you will either have to wait till its back or have the battery load tested. If the battery tests fine then its got to be the cables.
 

1NewBoatGuy

Petty Officer 3rd Class
Joined
May 9, 2013
Messages
94
Re: 1997 Force 120 - Wont overcome compression starting

I you are certain you have low voltage at the solenoid, trace back and find where it drops off. You might have a break or a short in the cable
 

jerryjerry05

Supreme Mariner
Joined
May 7, 2008
Messages
18,157
Re: 1997 Force 120 - Wont overcome compression starting

Any auto parts store should have cables. Use at least a#4 cable #2 is better.
Make sure you use solid cable ends.
If you buy premade? Watch out for the cheap connectors.They are crome plated crap.
The #2 won't fit through the holes in the cowl. You'll have to bore them out.
Load test the battery?
A rebuilt starter can be bad if the armature is shorted?They should test for it??
 

hundee r1

Petty Officer 2nd Class
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Mar 24, 2010
Messages
158
Re: 1997 Force 120 - Wont overcome compression starting

I recently attended to my boats cables, and did a small write up on a local forum, easy enough to C&P it here, it may be of help:

Had a good long hard look at some of the supporting systems on my boat and one that stood out straight away to me was all the main battery and earth leads.
The job of these leads isn?t easy, low voltage, high amperage to turn over a big 2 stroke Lawn mower motor. In many cases, left at the back of the boat, only looked at when there is an issue. Often open to the elements and sometimes even covered with a coat of nice salty water.

Now I?m sure if we where to look at all our boats, I?m confident we would come across some leads that look like this:



This was the worse one I had, (was linking the main earth between the 2 batteries) but after a quick check with a multimeter, the resistance in this short piece was close on 0.5ohm.
This would result and quite a significant voltage drop .
So I bit the bullet, ripped out all the main power and earth leads and went and seen a good mate and fellow fisho who manages an Autoparts store. Left it all with him, and with not much change from $100 came back with it all brand new. He was quiet, so he even crimped all the new eyelets on for me:




But not content with leaving it at that and ending back to where I am in 6months time, I went a couple steps further.
A quick mask up of the terminals contact area, then dipped the ends of all my new cables into this stuff (also got from a local Autoparts store, Im sure there is an equivalent in USA):



Came out looking like this:



Upon un masking (left to dry over night):



And just to make sure, some quality shrink heat shrink over the top:



Now, I?m sure it could be done with other products and maybe even slightly different technique, but this way, I?m sure it will be 100% better than it was, and once combined with good batteries, terminals and clean good earths at the motor, you can set and forget this part of the system from keeping you stranded at the ramp on a cold morning , or even worse, out in the briney as the sun is setting on a Sunday arvo.
 

jerryjerry05

Supreme Mariner
Joined
May 7, 2008
Messages
18,157
Re: 1997 Force 120 - Wont overcome compression starting

I like it. Yup they have an equivelent rubber paint here.
Good job.
 

fishngolf

Petty Officer 3rd Class
Joined
Aug 23, 2012
Messages
84
Re: 1997 Force 120 - Wont overcome compression starting

Sorry for the long lapse in response. I had dropped off the starter for rebuild before leaving for vacation. I get back to find out they could not test it and they wouldn't rebuild it. Guy tried to sell me a new one instead. I said no thanks especially for the two week delay when he said he could test it in the first place. I went through part by part again. Checked the cables turned out fine. Ordered and replaced the solenoid. No change. Only thing left was starter. Put a new one in tonight and boy does that thing crank over fast. The one I took off turned out to be the original. Thanks again for all the input.
 
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