83 johnson 25 wont run

irv66

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motor will start fine-run across lake,start to slow down-motor dies,doesnt want to start again.new impeller,plugs,hose etc.did not run gas out of carb last yr.-could this be the problem?im lost,been stranded twice already.any suggestions???
 

Daviet

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Re: 83 johnson 25 wont run

Do you slow it down or does it slow down by itself? Does pumping the primer bulb help keep it from stalling?
 

irv66

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Re: 83 johnson 25 wont run

as i slow down it dies,pumping ball does not seem to help.then it will not start again,fuel pump?
 

irv66

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Re: 83 johnson 25 wont run

first time it died-i noticed earlier in the day water pump was not working good-i changed impeller&am sure it did not over heat to cause any damage to cylinders-could something else have fried?still seems like a fuel problem,had jets adjusted by reputable mechanic-ran it in a barrel for 2 hrs.-no problems.
 

Daviet

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Re: 83 johnson 25 wont run

Usually pumping the primer bulb will by pass the fuel pump.
The only carb adjustment is for slow speed.
The problem still occours after the water pump was replaced?
 

irv66

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Re: 83 johnson 25 wont run

yes-have tried old hose&no difference.could something have gummed up carb over winter?should i rip carb apart?should i try new gas-seems too obvious-cruiseaday had 1/3 tank in it last fall w/stabilizer-added new gas.????????????
 

Daviet

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Re: 83 johnson 25 wont run

You should be able to remove the high speed jet without pulling the carb and see if it is clean.
 

irv66

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Re: 83 johnson 25 wont run

the one on the top? i did & it seems fine
 

Daviet

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Re: 83 johnson 25 wont run

The adjustable one on top is the low speed. The high speed jet is behind the 7/16 plug on the front of the carb bowl.
 

irv66

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Re: 83 johnson 25 wont run

pretty sure my buddy checked them all-if not could this be shutting it down and not starting again?thanks much for the help
 

irv66

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Re: 83 johnson 25 wont run

yesterday fishing w/ my 11 yr. old daughter when it wouldnt start,the lake started whipping up,raining-i stepped on livewell hose& it broke off& i started taking on water-after freaking out& getting it reattached-I WANTED TO UNHOOK THAT MOTOR & DROP IT 140 FT. TO THE BOTTOM OF THE LAKE!!!!
 

Daviet

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Re: 83 johnson 25 wont run

It only takes fuel, spark and compression to make your engine run. Since it does run at times I would think the compression is ok. That leaves fuel and spark. Is it electric start?
Might have to check spark when it fails, may try squirting fuel mixture in carb when it stalls and see if it fires.
 

irv66

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Re: 83 johnson 25 wont run

yes-its electric start-choke it-it fires but it dies right away after pushing choke in or leaving it out-taking it in tomorrow -will advise on tips, make sure he checks bottom jet-THANKS AGAIN>
 

irv66

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Re: 83 johnson 25 wont run

Hey davie-thanks for the help-we took carb off, soaked it overnight,sprayed it & blew it out & she ran like a million bucks for my dad & me for the last 4 days-next fall i ll be sure to fog it .thanks again.
 
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