1994 120 hp Force cranks but will not start

[bbassett]

Took boat out to the lake the other day. Started fine. Ran for about 30 minutes and then stopped for about 1 hour. During the stop, ran the bilge pump as had gotten some water in the boat when putting in. Also, connected a pump to the battery to pump up a tube. I bring up the bilge and pump as this is the first time I have done either of these things.

When I went to start, the motor would crank but would not start. Ended up pulling the boat back to the dock.

Getting fuel but have checked and am not getting spark on any of the cylinders. Have checked and the kill switch is on RUN and seems to be operating as it should (continuity when swiched to off - no continuity when swiched to run). Fuse on motor (right side) is OK.

I have read some threads that have similar issues and those say to try and disengage the kill system but I don't know how to do this. Can someone explain how to do this? Is there something else I should try?

Thanks for any help,
Bill

 

[gabrielh]

Re: 1994 120 hp Force cranks but will not start

Took boat out to the lake the other day. Started fine. Ran for about 30 minutes and then stopped for about 1 hour. During the stop, ran the bilge pump as had gotten some water in the boat when putting in. Also, connected a pump to the battery to pump up a tube. I bring up the bilge and pump as this is the first time I have done either of these things.

When I went to start, the motor would crank but would not start. Ended up pulling the boat back to the dock.

Getting fuel but have checked and am not getting spark on any of the cylinders. Have checked and the kill switch is on RUN and seems to be operating as it should (continuity when swiched to off - no continuity when swiched to run). Fuse on motor (right side) is OK.

I have read some threads that have similar issues and those say to try and disengage the kill system but I don't know how to do this. Can someone explain how to do this? Is there something else I should try?

Thanks for any help,
Bill

I had exact same problem as you.

I disengaged the kill sytem by unplugging the black/yellow cable right before the switch box (there should be a connector). Still no spark. Also disconnected the yellow wires from rectifier.
I sent the boat to the repair shop yesterday since there was still no spark. Guy called me this morning and he said It look like the stator went down.

 

[bbassett]

Re: 1994 120 hp Force cranks but will not start

I tried disconnecting the black/yellow cable at the ignition key (not sure if that is what you mean by switch box. I also disconnected the 2 yellow cables from the recifier. In both cases, I did not have spark when cranking it over.

Then looked in my Seloc manual and it said to test the stator to disconnect the battery and test the resistance between the two stator wires. From what I see though on the actual motor, the stator has 4 wires coming from it. A red, red/white, blue, and blue/white. So am not sure what wires to measure between. Also don't know if the .6-1.1 in the resistance table is ohms or megaohms. Assume ohms but not positive.

Measured beteen all wires and here is what I got:

red - red/white - 98 ohms
blue - blue/white - 7.7 Mohms
red-blue - 4.4 Mohms
red/white-blue/white - 1.9 Mohms

Based on these results, is the stator bad or do I need to measure between other wires?

Bill

 

[pnwboat]

Re: 1994 120 hp Force cranks but will not start

Blue to Blue/White should read 3250 - 3650 ohms.

Red to Red/White should read 73 - 90 ohms.

Looks like your low speed winding, Blue to Blue/White is bad. This would explain why you have no spark.

 

[bbassett]

Re: 1994 120 hp Force cranks but will not start

When I am replace the stator, should I replace anything else - like the trigger?

 

[pnwboat]

Re: 1994 120 hp Force cranks but will not start

Unless it's bad, no need to change it. Generally, the triggers are not under as much stress ( heat, voltage ) as the stators are, so the failure rate is somewhat lower.

 

[bbassett]

Re: 1994 120 hp Force cranks but will not start

I got the stator off. Part number is 39808778A24. From some other sites, I found out this is a 9amp stator and that some others have had multiple issues with this stator. I know there is a 16amp version of the stator and have seen some information from people that the 9amp is prone to issues and the system should be updated to the 16amp version. Is this true that I will continue to have issues with the 9amp and should update to the 16amp? If yes, what does it take to update from the 9amp to the 16amp stator.

Thanks,
Bill

 

[pnwboat]

Re: 1994 120 hp Force cranks but will not start

To use the 16 amp version, you need a voltage regulator/rectifier which you may already have. 9 amp version will work with either just a voltage rectifier, or a voltage regulator/rectifier.

 

[bbassett]

Re: 1994 120 hp Force cranks but will not start

The part number of the regulator on the motor is 815279-4. If I want to convert to the 16 amp stator, is this the right voltage regulator or do I need a different one? If I need a new one, what part number should I be looking to buy.

Also, just so I make sure I get all the right parts, what is the part number for the 16 amp stator.

Thanks for the help,
Bill

 

[pnwboat]

Re: 1994 120 hp Force cranks but will not start

You lucked out. 815279-4 will work with the 16 amp stator.

CDI Electronics part number for 16 amp version is 174-9710K1. It is available on IBoats and other sites. Here is a link to a web site that has parts listing. At the very bottom of the page it has an explanation of the regulators vs stators.

http://www.seilermarine.com/rapair/force.htm#8778K1-9710K1

 

[bbassett]

Re: 1994 120 hp Force cranks but will not start

I bought and installed the 174-9710K1 stator. Motor started right up. Now I have a new issue. When at WOT, the charge voltage is 16.5-18 volts. Before replacing the stator, I do not remember it getting much more than 14v.

Battery was new last year and is fully charged. I cleaned the battery connections and tested the cables from the battery to motor (0.5-0.7 ohms).

Any idea what could be wrong? Could the voltage regulator be bad?