1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver" pos.

Goldrown4

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1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver" pos.

Newbie on this marine-based forum (but not new to mechanic related forums) and basically a newby regarding maintenance of marine engines. Thanks for any guidance. Stumped.

Motor Details: '88 Force 85; 3 cyl; Model: 858V88; S/N: 1705

What led to this...

Last Saturday - After buying brand new marine dual purpose battery, I took Dad's old boat out to run her for the first time this Summer (boat ran great last Summer, but admittedly, did not trickle charge the $250 Opti Blue-top battery over the Winter, and failed to stabilize/treat the fuel over the Winter). I filled three of the four 6-gallon tanks with fresh gas. Unfortunately it was Ethanol. Knowing this (but not knowing that's a no-no with these old motors) I poured 5 oz of Seafoam into each of the three tanks. Boat fired up after a few tries, and though I never went WOT, I clearly was able to get way past trolling speed. 20 min of excellent running later, engine ka-put. Restarted, but wouldn't go past 1600 RPMs. Brought the boat in closer to the launch and she died. Winds had picked up, and had to throw anchor to keep from crashing into the rocks. 3 re-starts later (over a 20 min period) and we crept back to the dock, though the motor sounded good. A quick and brief re-start at home and she fired right up. I figured I had some dirt in the fuel that maybe came loose.

Last Sunday - Hard time starting, but it finally idled good, launched but wouldn't rev past 1600-1700 rpms, trolling speed. Ran her for 75 min at that speed, but things never improved... switched tanks a few times too. No joy. Putted back to the dock a few hours later. Got home, took off the cowling to find a nut loosely laying about and was quite shocked it wasn't way down by the prop somewhere. Got it out, searched for where it should be threaded and discovered the bendix starter post (is that called a pinion?) had a loose spring atop, but no nut. Threaded the nut down and compressed the spring, but I don't know how far down it is supposed to be (I turned it all the way until finger tight).

On to This Week - Dad told me the plugs probably hadn't been changed in years. Though a bit harder to find, I replaced the wet and grimy Champion (rimfire??? no typical electrodes on these plugs) with Autolites (no one seems to have the NGK 2522s around here). Plug wires appeared fine, and I cleaned out the round aluminum fuel "filter" screen, though it was mostly clean already. I put 8 oz more of Seafoam into one of the tanks, hooked up the water hose/headphones, primed the bulb (new last Summer) turned the key, watched the choke work the carb linkage, click, bendix jumped up, tried to engage the flywheel, but flywheel wouldn't turn. I gave it 30 sec, cranked, but bendix did the same thing. This time, the unit would not work itself down the worm-drive thingamabobber. I was able to wiggle the flywheel and it dropped. Third start attempt, the bendix jumped up, lots of loud clicking/grinding but still would not engage the flywheel, and this time, I cannot get the bendix to drop at all. Flywheel is a bit stiff to turn manually.

First step??? Degrease/carb cleaner on the bendix? What do I lube it with after? Dry lube? waterproof grease?
 

Jiggz

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Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

Clean and a light grease is all you need both for the worm drive and pinion. If the pinion's teeth are worn out you might need to at least replace the pinion gear or even better with a new starter ($60~$80 non OEM). Why it wouldn't go past 1600 RPM is puzzling though. Have you checked the throttle positions to make sure it opens all the way with the shifter?
 

Goldrown4

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Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

Clean and a light grease is all you need both for the worm drive and pinion. If the pinion's teeth are worn out you might need to at least replace the pinion gear or even better with a new starter ($60~$80 non OEM). Why it wouldn't go past 1600 RPM is puzzling though. Have you checked the throttle positions to make sure it opens all the way with the shifter?

Thanks for the response! ...will give that a shot tonight. I have both carb cleaner and pb blaster, but should I just use WD40 for the cleaning? I have some waterproof grease that I use to quiet my fawcett handles. I wonder if that is sufficient for the lube. I still find it odd that the pinion nut was found loose in the engine... of course, I have no way of knowing when it vibrated itself off. Could have been years ago, no?

Teeth are good on pinion and flywheel. I have not checked the physical throttle position as related to the carb linkage... not a bad logical choice to take a look though. Should I be spraying something inside where the spark plugs make contact? The Champions I took out were very grimy and black. It must be quite nasty in there.
 

Frank Acampora

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Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

There should be a collar on top of the spring and below the nut. The pinion nut is threaded all the way down. What is happening to you is that the bendix is rising too far on the shaft and either jamming against the flywheel, rising past the threaded worm on the shaft, or both.

Correct plugs are Champion L20V or L76V (Merc), NGK BUHX or BUHW. Autolite (which I don't like are something like 2492-- not sure the exact number 'cause I never use them.
 

Jiggz

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Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

As soon as you get it running again, you can try decarbonating the engine either with straight seafoam or just water using a spray bottle. By revving the engine using the tie bar (do not exceed 4000 RPM) at the same time spray seafoam or water into the carbs openings intermittently between the carbs. Not too much it will kill the engine. Just enough to see white smoke (steam) coming out of the exhaust. This will rid of the carbon buildups in the cylinders.
 

Goldrown4

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Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

There should be a collar on top of the spring and below the nut. The pinion nut is threaded all the way down. What is happening to you is that the bendix is rising too far on the shaft and either jamming against the flywheel, rising past the threaded worm on the shaft, or both.

Correct plugs are Champion L20V or L76V (Merc), NGK BUHX or BUHW. Autolite (which I don't like are something like 2492-- not sure the exact number 'cause I never use them.

Unfortunately, I couldn't find Chamption or the preferred NGK BUHX units and had to go with Autolites... at least they are brand new. Question is, wouldn't these old motors run better using a different spark plug core conductor? Will they only run good with copper? And will the Force motor only accept a rimfire style?

As for a collar, if there is one, it's somewhere else in the motor shell. The nut easily holds down the spring though. I should take a photo of the bendix where it's at. It is right up there with the flywheel, about the same level.
 

tater76

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Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

You said you used new gas with sea foam, but you didn't mention the TCW3 oil (marine two stroke oil)? Did you mix it in 50:1?
 

Goldrown4

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Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

Got the old Force 85 running yesterday! My Uncle found the shop manual at the library, but more importantly, he found the missing collar/spacer for under the pinion nut too! PB Blaster is likely a major contributor to loosening up the worm gear... WD-40 may have helped, but didn't seem to have the effectiveness, though I did wait an hour after dousing with PB before attempting to turn over the motor again. Funny, the shop manual said to try to start the motor at 1/4 throttle in efforts to loosen the pinion gear. The motor wouldn't even attempt to turn over if not in neutral. BTW, after successfully repeating the motor's ability to properly start, I ran it past 1600 rpm's (with the water running to the lower unit of course)... a bit smokey, but expectedly so... the motor ran really well.
starter pinion.jpg
After all the effort, I have questions:

1. What is an appropriate marine-environment-friendly type of "loc-tite" to keep the pinion nut from un-threading itself every time I try to start the motor?
2. What is the best approach for cleaning sediment out of the four 6-gallon tanks and parts inside them?
3. What are the max rpm's I can safely run the motor when while water-cooled via garden hose?
4. The knob under the throttle... isn't that supposed to disengage the prop after the motor is started (like a clutch)?
5. @Jiggs - that metal plate in front of the three carbs that "bends" around to the back... that is the air intake, right? I can spray seafoam directly into that while the motor is being revv'ed? It must divide into chambers where I cannot see.
 

Goldrown4

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Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

You said you used new gas with sea foam, but you didn't mention the TCW3 oil (marine two stroke oil)? Did you mix it in 50:1?

I tried to respond to this a few days ago, but Google Chrome hosed things up. 50:1 ratios have been carefully maintained. I don't remember the brand of the 2 cycle oil I used, but it was purchased at Fleet Farm here in Oshkosh. I've been noticing a lot of sediment in the tanks, something I really want to eliminate, but not sure on the best approach to clean them. Empty, air dry, vacuum? Rinse (with what?)
 

SweeperForce

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Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

I would highly recommend using an in-line fuel filter. It has a glass housing so you know when to change. Easy yo install, just cut the fuel line in between the fuel pump and the carbs. See pic.
Enigine pics_0007AB.jpg

You can advace the throttle while leaving the gears in nuetral. If your controller is like mine, there should a button in the center of the controller arm, just push it in while you move the arm forward. See pic.
Boat pics_0007AB.jpg

Hope this helps,
Tom
 

Goldrown4

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Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

Thanks for the photos! I will be installing an inline filter soon. I read that some people replace the black fuel line tubing with clear as well.

I don't have a photo of this, but the throttle is attached to a console built in the center of the boat, whaler style (not on the starboard side of the boat). Under it, is a metal push-pull knob that I believe is a "clutch" for lack of a proper word. I'll be getting the boat in the water this weekend to see if I can get it to function properly and see how many clean RPMs I can get the boat up to. The throttle has no other buttons on it (no trim, etc), just an indicator for Neutral, Fuel Saver etc.

I would highly recommend using an in-line fuel filter. It has a glass housing so you know when to change. Easy yo install, just cut the fuel line in between the fuel pump and the carbs. See pic.
View attachment 159154

You can advace the throttle while leaving the gears in nuetral. If your controller is like mine, there should a button in the center of the controller arm, just push it in while you move the arm forward. See pic.
View attachment 159156

Hope this helps,
Tom
 

Goldrown4

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Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

Two thumbs up! The boat performed very well this weekend. Saturday's test run wasn't without its drama though of no fault of the motor. Btw, first attempt in the lake going past 1600 rpms the motor wanted to bog down gain, but after the throttle was goosed regardless, something "broke loose" and the motor got up to 4600 rpms (max). I don't know how to determine what pitch of the prop I have (all I know is that it has 3 blades).

Ran all over the lake, ventured down a channel trying to find inlet to the City of Omro Park but prop got rather unexpectedly stuck in muck, Lilly pads and a reinforced heavy plastic sheet or bag, causing the motor to shut down. No electric trim, so I had to muscle the motor to tilt so my neighbor could unhook the garbage. Restarting, the motor forcibly quit again from too shallow water and muck. I held the Force in a high trim position while my neighbor started it but when he placed in Drive, the torque almost yanked the motor out of my hands, but I was able to hold on while he slowly got us out of there. We trailed swirling mud for about 200 yards, got back out in the lake and accelerated to WOT without any trouble... for 30 seconds that is. After switching tanks ha ha! we had no further issues. Sunday was without incident as well.

Question: Should the throttle linkage be lubricated periodically? Only makes sense to do so. Not sure how to proceed.
 

Goldrown4

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Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

boat1.jpg

Now I have to make this boat look less ugly. Tape residue needs to come off, and either re-paint or vinyl graphics.
 

Goldrown4

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Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

Re: 1988 Force 85 - Bendix stuck at flywheel | won't go past 1600 rpm "Fuel Saver"

Here's the profile view that shows all the ugly tape residue. Apparently my Dad was forced (no pun intended) to tape down a tarp at some point in the past. I have a different cover for it now.

boat3.jpg
 
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