1997 Force 120 HP Starting At WOT Only

jay2670

Cadet
Joined
Oct 22, 2010
Messages
18
Re: 1997 Force 120 HP Starting At WOT Only

Yes lucida that is the correct steel Im not sure how well it will hold up and how much worse on the cylinders it be if it broke and made it to them. But I was desperate to get back on the water prior to the end of the year. thought I would have a couple more weeks of good fishing.

Pnwboat, I agree my good reeds were not twisted just lifted a bit so you see light through them. By flipping them over I could not see any light.

So now when I thought my reed valves were the problem and had it running. This is not true. Friday evening I arrived home to take it to the lake. Thought I would pull it out of the shop and hook muffs and hose to it. Just to be sure it will run, but it is doing the same as before. It will not run or start unless it is wide open on the throttle. In my shop I did get it to idle but only had it in a plastic drum and did not let it run long, it might of ran 2-3 minutes. Idled really good no jumping around just smooth as can be. Just when I thought it could not get any worse I decided to relpace the trigger and stattor just to eliminate these items as possible causes. When I attemped to pull the flywheel off I used a very large two jaw gear puller and I could not get it off. Soaked it with blaster (pen oil) overnight and then I noticed three threaded holes so I used harmonic ballencer puller. It came right off after a big pop. But now I have damaged the magnets they are all cracked and chunks of them all over. Wow are they expensive.
 

JAMGO46

Cadet
Joined
May 1, 2007
Messages
14
Re: 1997 Force 120 HP Starting At WOT Only

Buy a used flywheel on Ebay. There are several on there all the time. Ive seen them anywhere from $60 to $250, shop around and you will get a good deal if you are not in a hurry.
 

pnwboat

Rear Admiral
Joined
Oct 8, 2007
Messages
4,251
Re: 1997 Force 120 HP Starting At WOT Only

Do a compression test. Check the reed valves again to see if you broke some more. Remember, when you first replaced them, you said that it ran better than it ever has before. As unlikely as it may seem, I would check them again just to be sure. Remember, the reeds in this year motor are know for breaking.

Flywheels run around $200 used. Stators, around $100 - $130 used ($200+ new). Trigger around $30 used ($50 new). Looks like you're looking around $350 minimum to replace those three items. Don't get caught up in the trap of replacing parts without verifying first. Right now you're looking at around $200 for a flywheel.

Replace the flywheel, do a compression check (very important) and check the reeds again before you spend any more money.

If the compression checks out OK, and no more broken reeds, it's easy to check the stator with a digital volt meter.
 

jason32038

Chief Petty Officer
Joined
May 25, 2009
Messages
555
Re: 1997 Force 120 HP Starting At WOT Only

Wish I could help you. I have an extra flywheel from a mid to late 80's 85hp but I think the flywheels were changed.
 

pnwboat

Rear Admiral
Joined
Oct 8, 2007
Messages
4,251
Re: 1997 Force 120 HP Starting At WOT Only

jay2670, I sent you a PM.
 

jay2670

Cadet
Joined
Oct 22, 2010
Messages
18
Re: 1997 Force 120 HP Starting At WOT Only

I have checked to stator and Im showing 654 ohms so I think it is good. I checked my compression a couple of weeks ago and I was about 120PSI on all cylinders. Unable to check compression until I install flywheel back on the engine. I did remove the reeds and all is good. One thing I noticed is that when I pulled my boat out of the shop to fire it up on the hose in the yard. The grass was saturated with oily fuel. So this is telling me I may have issues with cylinders firing. I did manage to have it running at this time but I would have to start it in high throttle but could only bring it back almost half way before it would die. It was running ruff when it did run.
 

pnwboat

Rear Admiral
Joined
Oct 8, 2007
Messages
4,251
Re: 1997 Force 120 HP Starting At WOT Only

You may have a carburetor needle valve stuck open, or your "fuel enrichment solenoid valve" (choke) may be stuck open. Either one will cause the motor to flood and cause the symptoms you describe.
 

jay2670

Cadet
Joined
Oct 22, 2010
Messages
18
Re: 1997 Force 120 HP Starting At WOT Only

pnwboat is there a way to check this soleniod valve. This unit has three small vac lines running to it. Gold in color. Small black button on top. Correct??

As for the carbs I have rebuilt them since my troubles started.
 

pnwboat

Rear Admiral
Joined
Oct 8, 2007
Messages
4,251
Re: 1997 Force 120 HP Starting At WOT Only

Yes, that's it. Simple way to check if it is leaking is to pull the two lines that go to the base of the carburetors at the intake manifold. Only time you should see gas coming out of those two lines is when you push the key in to engage the choke when cranking. Pull the lanyard to the kill switch so the motor won't start and crank the motor without choking. If any gas come out, you know it's stuck open. A couple of shots of carburetor cleaner will usually free it up. You can also take the supply line from the top carburetor bowl and try blowing through it. You should not be able to blow through it unless the choke is engaged.
 

jay2670

Cadet
Joined
Oct 22, 2010
Messages
18
Re: 1997 Force 120 HP Starting At WOT Only

Thanks PNWBOAT for the info I will give this a try but first I will need to fix the flywheel so I can crank it over.
PNWBOAT I sent you a PM
 
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