Force Outboard Blues

[BAYLINERDREAMS]

I have a 1988 85 hp force motor. It runs great. But after running it about 30 minutes or so, or when I am at a slow no wake speed the motor will die when I go from neutral to forward gear, unless I give it a goose to full throttle, and then back down. I noticed when I was loading it on the trailer and had the motor at the tilt position for towing, fuel was leaking from the cowling. Are my floats stuck? Is it a carb issue? Im thinking of dumping the whole motor and going to a 4 stroke. Any suggestions about the largest 4 stroke I can mount on the boat. Its a 1988 17.5 ft Bayliner carpi bowrider. I was told the force weighs about 300 lbs I am looking at the 75 or 90 hp honda 4 stroke that weigh about 378 lbs. Any input would be greatly appreciated.

BAYLINERDREAMS@COMCAST.NET

 

[jerryjerry05]

Re: Force Outboard Blues

Try running some fuel conditioner/cleaner thru it.What is the RPM set at?The fuel is just leaking from the float bowls.Nothing to worry about.Make sure the carbs are set correctly.All the way in on the air screw till it bottoms out, then out 1 to 1and 1/8 turn.

There is a sticker on your boat that shows max hp.That boat I believe was rated at 90hp max.Past that and you can get crap from the ins co and police or coasties.
Another 75# wouldn't hurt, the max hp is where you'd get in trouble.Jerry

 

[Haywood123]

Re: Force Outboard Blues

everything I have ever read on those carbs says that gas spilling out when you tilt it up, is normal. My boat killed a lot going into forward as well. I don't know if it was coincidence or not, but I rebuilt my fuel pump for another issue I was having, and that problem with it stalling, went away as well.

 

[JoeCrow]

Re: Force Outboard Blues

4 strokes are a lot heavier than 2 stroke motors
Also the HP rating although similar may be a lot greater in reality
I replaced my 1986 Force 125 with a 2002 Mercury 125
Both are 2 stroke carburated motors
The power difference is unbelievable and although the transom is rated for "125"
I baby it a lot as I worry about ripping the transom out of my 1986 Bayliner 19' Capri
The torque is what seems to be the biggest change,
but the extra 75 pounds means a lot too

 

[BAYLINERDREAMS]

Re: Force Outboard Blues

I have a 1988 85 hp force motor. It runs great. But after running it about 30 minutes or so, or when I am at a slow no wake speed the motor will die when I go from neutral to forward gear, unless I give it a goose to full throttle, and then back down. I noticed when I was loading it on the trailer and had the motor at the tilt position for towing, fuel was leaking from the cowling. Are my floats stuck? Is it a carb issue? Im thinking of dumping the whole motor and going to a 4 stroke. Any suggestions about the largest 4 stroke I can mount on the boat. Its a 1988 17.5 ft Bayliner carpi bowrider. I was told the force weighs about 300 lbs I am looking at the 75 or 90 hp honda 4 stroke that weigh about 378 lbs. Any input would be greatly appreciated.

BAYLINERDREAMS@COMCAST.NET

Thanks for the input guys. I will try, resetting the screws. I added a can of Seafoam the last 2 times I refuled the boat. As for a 4 stroke, I think I can get away with a 75 or 90 hp motor. To compensate for the weight, I will only allow the hotter, thinner bikini babes to sit at the stern.

 

[BAYLINERDREAMS]

Re: Force Outboard Blues

Does anyone know of a website or link that will bring up a spec sheet of a
85 hp Force motor carb, with a visual breakdown of the carbs, showing a blowup version of each individual part, where it goes and the name of each part?

 

[john from md]

Re: Force Outboard Blues

Mercruiser.com will have the schematics that you are looking for.

Check your ball when your engine dies at slow speeds. If it is soft, you may have bad check valves in the fuel pump.

Regards,

John from MD

 

[chitownborn]

Re: Force Outboard Blues

www.crowleymarine.com has the schemematics your lookin for.

 

[RRitt]

Re: Force Outboard Blues

there are different ways to measure HP. I'm not sure of the details so I'm just guessing. If someone knows the actual facts about HP ratings then please jump in and let us know. I think you can measure HP at crankshaft or at prop. At crankshaft you'll get the full horsepower of the engine with no loss or slippage. At prop you get about 15% less. I also believe that all modern outboards measure HP at prop. So your 110HP Nissan pouts out as much actual power a 125HP Force and your 125HP Mercury puts out same as 143HP Force.

You can squeeze some extra juice out of your Force by using different (composite) reed valves. They are relatively cheap (I think boyensen are about $35 per cylinder?). However, they won't be as durable as Chrysler and if (when) they crack then you might blow up a powerhead. So you can get extra horsepower out of your old Force by using different reed valves. The downside is that you will need to consider reed valve inspection as part of regular maintenance (or risk having your engine self-destruct). If you have a Mercury Force then this is not a concern. Mercury already put composites in for you. What do they care? By the time your engine blows up it will be out of warranty anyway. (which, IMO, pretty much sums up mercury as a company)

 

[BAYLINERDREAMS]

Re: Force Outboard Blues

Well guys I finally bit the bullet and took my motor to the shop. After the carbs were removed and cleaned the mechanic reinstalled the carbs. They fired up the motor and found fuel leaking from a gasket he said was located behind the coils. I dont know what gasket he is talking about but he said it is very worn and he can see the fuel leaking from there. Can anyone tell me what gasket he is talikng about? ITS A 85 HP FORCE MOTOR.

 

[john from md]

Re: Force Outboard Blues

It could be the transfer port cover. This is located behind the fuel pump and partially under the coil bracket. I believe there may also be another cover under the transfer port cover but I don't have my schematics handy right now.

Hope this helps,

John

 

[Reboot11133]

Re: Force Outboard Blues

The only thing behind the coils is the fuel pump, and the intake covers. It is most likely the fuel pump he is talking about. A rebuild kit for the fuel pump is not expensive and should solve your problem.