1991 120 Hp Force stator good or bad

[Force 120]

Hi,
I took the ohms measurement of my motor stator

Brown/yellow to Brown/blue = 425 ohms
or the pair of
Brown/yellow to Brown/blue = 427 ohms

Brown/yellow to Brown/yellow = no valve ohms
Brown/blue to Brown/blue = no valve ohms

Is this stator still good ? Manual show 500-800 ohms.

I found a complete use 1992 120 Hp Force iginition removed from working motor (stator,coils, switch box and mounting terminal ect.)
Could I completely swap 1992 on 1991 block ?
My CDI and Coils is blue color but 1992 is black and has switch box.

 

[pnwboat]

Re: 1991 120 Hp Force stator good or bad

If the stator was replaced sometime in the past with one manufactured by CDI electronics, those measurements are within specs. The CDI units read lower than the original factory units.

What type of problem are you experiencing?

You can use the 1992 with the switchbox, however, the plate that the coils mount on are different and the bolt holes that holds it to the block are not the same. You may have to rig up a bracket of some sort to be able to bolt it to your existing block. The other problem is the connectors on the wires. If your system has the 12 position terminal strip on the coil mounting plate, you may find that the 1992 system does not use the terminal strip. You may have to change the termial ends on you system or the new system to be able to hook everything up.

 

[john from md]

Re: 1991 120 Hp Force stator good or bad

Like pnwboat said, let us know what problem you are having. Maybe it is not your stator at all.

John

 

[Force 120]

Re: 1991 120 Hp Force stator good or bad

Thanks alot for all your help.
Here is part number on the stator: FCC3007L 2690
I took a good measurement again today at noon the temperature about 75degree.
Brown/yellow to Brown/blue = 438 ohms (wire 1 & 2) by the label on the wire.
Other pair
Brown/yellow to Brown/blue = 438 ohms (wire 3 &4)
Yellow to Yellow (2 wire goes to rectifier) is almost continuity (0 ohms)

I also have a 1989 125 Hp powerhead spare. I remove its stator and try to swap it on 1991 head but the measurement is supprised me
Brown/yellow to Brown/blue = 424ohms (wire 1 & 2)
or the pair of
Brown/yellow to Brown/blue = No thing change (infinity) (wire 3 & 4)
So I guess my 1989 stator is bad.

My problem is the engine did not have spark. The spec. says 500-800 ohms so I assumed that it was bad and remove it from the engine. Now I will put it back on the engine and try again.

 

[john from md]

Re: 1991 120 Hp Force stator good or bad

Since you said you did not have spark, was this on all cylinders? If so, have you disconnected the CDI grounding circuit to see if that was the problem?

What led you to the stator? As a rule, CDI modules go bad much more often than stators.

John

 

[Force 120]

Re: 1991 120 Hp Force stator good or bad

Put the stator back and have very strong blue spark on all cylinders.
Start engine after a couple cranks and enginer idles nice but the upper Cab. spills a lot of gas out. Other thing I notice that the flywheel somehow is out of balance. I need to remove the flywheel and check again.

 

[john from md]

Re: 1991 120 Hp Force stator good or bad

The fuel coming out means that the float needle is not seating properly, the fuel level is set too high, the float has sunk or the reeds are bent.

The flywheel sits on a tapered shaft that is connected via a woodruff key. You need to make sure that the hole in the flywheel and the shaft are clean of any kind of dirt. I wipe a little engine oil on the shaft before installing the flywheel and I use some anti seize compound on the threads of the nut.

You also have to inspect the key. It should be flat on all edges. If you see a line going longitudely through the wide side, you need to get a replacement. That line means that the key has been stressed and can stretch or shear. That has the result of throuing your timing all to hell and you don't want it to happen out on the lake.

John

 

[Force 120]

Re: 1991 120 Hp Force stator good or bad

Hi John,
I measure the key is about 3/16" thick and 5/8" wide.
I found the website
http://www.mcmaster.com/#98525a110/=3qcvef
has part #98525A110
Alloy Steel Woodruff Key 3/16" W X 5/8" B Nominal Sz, Key #61, USA Std #605
Does this key work ? I could get 100 of them for spare

 

[john from md]

Re: 1991 120 Hp Force stator good or bad

Was the key damaged? If so, you need to look at the slot in the wheel and the shaft to see if they have burrs. If the do, you need to very lightly dress the burrs out with a stone or fine file without taking off too much.

You may be able to buy a key locally at a machine shop. I have bought small lots of hardware through the mail and found that the shipping is usually more than the part.

The part illustrated in the MC catalog will work.

John

 

[Force 120]

Re: 1991 120 Hp Force stator good or bad

Tighten the bottom Carb. screw and no spitting oil. Carb. fuel level sets correctly. Adjust idle screw out 1 turn, the engine runs will a lot of smoke.
Is it normal when it has a lot of smoke. A lot of smoke coming out while it running. I have old 70 Hp chrysler engine and have ever had a lot smoke like this.

 

[john from md]

Re: 1991 120 Hp Force stator good or bad

Give it a good decarb and then go open it up. That will clear up sticking rings and clean the recirc passeges and the smoke should go down some. Force engines however, do smoke more than most.

I get looks at the dock all the time and my engine is in top tune condition.

John

 

[Force 120]

Re: 1991 120 Hp Force stator good or bad

John, I had took this engine a part last month and clean up all the carbon deposit in the pistons and done a light honing job on all cylinders. So this engine is very clean internally. Should I dial the idle screw in 1/8 turn to make it leaner ?

 

[john from md]

Re: 1991 120 Hp Force stator good or bad

You can try that but I don't believe that will reduce it much. Have you cleaned the recirculation check valves, orifices and/or reeds? I included all of them as I don't know what type of recirc system you have on your engine.

John

 

[Force 120]

Re: 1991 120 Hp Force stator good or bad

Now the engine runs less smoke. Smoke was from oil in the block when I installed the pistons.
I got a shock occationally when I touch the engine head while it running.
Today I got a strong shock when I touch the head.
Does anyone know this problem?

 

[john from md]

Re: 1991 120 Hp Force stator good or bad

If you got a strong shock like if you touched a plug wire, then your coils may be damaged and are leaking. If you take them off and look on the back side you will see what appears to be pin holes if they are leaking.

John

 

[Force 120]

Re: 1991 120 Hp Force stator good or bad

Thanks for your info. There are four coils. Is there any way find out which one is a bad one by checking the ohm measurement instead of visuall inspection.

 

[john from md]

Re: 1991 120 Hp Force stator good or bad

Not really as the coil is operating properly. The only thing is that the insulation is breaking down and discharging to the case. You have to remove each of them and look for the little pin holes.

John

 

[Force 120]

1987 125 Hp Force Cab. vs 1991 120 Hp Force Cab.

1987 125 Hp Force Cab. vs 1991 120 Hp Force Cab.

Are 1987 125 Hp Force Cab and 1991 120 Hp Force Cab the same. ?
My 1991 top cab is still spilling the gas out when it runs. I have taken apart many times but could not correct the problem. I have a spare set of 1987 125 Hp cab and I 'd like to switch. Do it work ?

 

[pnwboat]

Re: 1991 120 Hp Force stator good or bad

The older carbs should work fine, but have you replaced the needle valve in your top carb that continues to leak?

 

[john from md]

Re: 1991 120 Hp Force stator good or bad

They will probably work fine. The main jet set up may be different but they still should run.

John