86 125 hp force-slow speed

[werdna9691]

i have a 19 foot trophy f/s with 125 hp outboard<br />i ran it a few times on the lake and the tilt trim went south i still was able to run it without the tilt trim although it was hard loading and unloading it. it ran about 40 mph<br />when trimmed up and about 35 mph without the tilt n trim. i was pulling into the boat ramp<br />parking lot and the motor bounced off the motor tote and i drug the prop on the payment. i filed the prop on site as best i could and took the boat out anyway. we were having a small club tourney that day. i ran the boat out and the best i could do was about 10 or 12 mph. when the tourney started i went out behind 3 other boats and the boat jump up to about 30 mph.<br />i shut it down to fish an island then when i went to leave the boat would only go about 10 or 12 mph again. i bought a new comp prop and repaired the skeg. took it out today and the boat was still slow. if i put it in neutral<br />and rev the motor it sound fine then you put in gear and take off and the engine justs bogs down it jumps and misses at about 3/4 throttle<br />like it wants to take off but it wont it juts putts along do you have any ideas on what might be the cause? (ive replaced the plugs)<br />(just and afterthought:when you put the motor in neutral after you ran for awhile then you can <br />push the throttle all the way open and it wont<br />reach any kind of rpm could it be something to do with the throttle linkage

 

[roscoe]

Re: 86 125 hp force-slow speed

Could be something simple, like the motor flooding out from a leaky fuel pump diaphram.<br /><br />Or it could be much more serious, like a bent prop shaft.<br /><br />Gonna have to go over the engine real close to find out.<br /><br />Start with the basics, check compression, check lower unit oil for water intrusion, check spark.<br />Check fuel pump, if its leaking into the block, it will flood the bottom cylinder.<br /><br />To check the propshaft, you need a guage to measure it for run out.

 

[outboardguy]

Re: 86 125 hp force-slow speed

I believe that the linkage is limited while in neutral.It will allow throttle in gear but when in the neutral position a piece on the shift cable blocks the throttle cable from reaching WOT.

 

[werdna9691]

Re: 86 125 hp force-slow speed

it could be the diaphram i have noticed a good bit of fuel below the bottom carburator i will <br />check it out i think i will try to run it without<br />the prop in a barrel of water and see how she runs thanks for the help

 

[scotiany]

Re: 86 125 hp force-slow speed

I don't if this applies to your engine but , in the Seloc manual for Chrysler they say to never run the engine without the prop.

 

[eurolarva]

Re: 86 125 hp force-slow speed

Do you tilt your motor up when you transport it? If so that is probably where the gas is coming from under the carb. When you tilt it up they leak out

 

[werdna9691]

Re: 86 125 hp force-slow speed

i decided to check the spark on the plugs and come to find out i had no spark on #1 cyl. i had a wire loose on my powerpack.