89' 85hp force "Bogging under load"

[peebles]

Hello I am new here but need help. very confused. My folks were given this boat by their folks and was well taken care of. But here is what is happening. It seems to run fine at first. Starts pretty much right away and stays running doesn't sound like there is any miss fire at all. Runs great until after about 10 mi. Last 2 times we've gone out it has run fine to a destination, no bogging or hessitation. But after we sit for a couple of hours and go to go again, Starts fine and runs in Idle And engaudged in forward troll speed about 5mph. But as soon as you try to give it load (throttle) it tarts to bog down as it is going to quit. When it starts to do this if pull it to neutral it stays running, put it back into gear it moves at 5mph then when you give it throttle it bogs out again. We have checked the gas tanks and the lines and all is running smoothly. Impellar and water pump were replaced last year and are working fine. Any help please.

 

[givener]

Re: 89' 85hp force "Bogging under load"

I'm having the same problems on an 1988 85 HP Force. There are threads on this site discussing numerous similar problems, all offering useful suggestions (usually related to electrical) but so far no magic solution as far as I have read. Have not yet tried any of the possible remedies but I'll let you know how things go. If you discover a solution it would be great if you could post the follow-up on this site as well. Good luck to you.

 

[gjm]

Re: 89' 85hp force "Bogging under load"

I had the same problem for years. Had it in for countless repairs at differnt marine shops. Do you have gas leaking out of one of the carbs? Is there gas in the water all around the motor? I bought a manual and took apart the carb that was leaking gas. Make a long story short, it was a float with a hole in it. Was not regulating the gas flow correctly. I got over my fear of carburators and realized there isnt much to them. EASY Now Im even fixing my own lawnmowers and weed wackers.

 

[givener]

Re: 89' 85hp force "Bogging under load"

Thanks, gjm. I've only had the boat out once since buying (twice if you include the water-test before buying). Water-test went fine but it was fairly short. First time out ran into problems after about 30 minutes or so. When stopped in the water did see some gas around motor, so I'll check into that further. Most posts I've read about similar problems and people have been steered toward CD unit problem and it overheating once used for a duration. Winter is coming fast in these parts (northern Canada), sure hope I can resolve something before giving up till spring.

 

[eurolarva]

Re: 89' 85hp force "Bogging under load"

When motor starts to bog down does giving it choke improve the condition or cause the motor to die? What color stator do you have. Black or red. Mercury had a ton of problems with the black stators and went to red as part of their recall. The problem they were having sounds like your problem. When stators heated up the high end would short out and motor would bog at higher speeds.