2000 Johnson 115 possible fuel problem

[redfisher80]

I just recently bought a boat with a 2000 johnson 115 ocean pro. When I took it out for the first few times I noticed at first that the motor would hesitate or sometimes just stall out when trying to jump up on plain, but ran good at idle and at full speed. Soon after running it hard for weekends after I started to feel a hesitation in power when running at full speeds, being carefull I would come of a plain and the boat would stall and then start stall after that. I could sometimes get it to start by giving it some gas in neutral, but it would stall after trying to put it in gear. Because of a previous history of water in the gas which has been fixed I decided it could have been the carbs, so I rebuilt them. I put the boat on ears after getting it back together, and after about 15 mins everything seemed to be going good so I decided to rev it up a few times, after the boat lowered in rpms it stalled and kept during the same thing it was doing before. It will start and idle alright when the motor cools down but shortly after will stall again. I have checked the fuel water separator and even changed the filter everything looks clean, also tried to run some fuel treatment through the system, and put new spark plugs in. Any help would be appreciated work has been slow forcing me to try to do this on my own, thanks redfisher P.S. this last time on ears the oil light and siren came on so I shut the motor off and restarted and the light went off.

 

[tashasdaddy]

Re: 2000 Johnson 115 possible fuel problem

have you check compression, and spark on all 4 cylinders? also check spark as soon as it shut down. have you done a link n sinc of the motor. it could be a mid range jet problem also. do these item and post results.

 

[redfisher80]

Re: 2000 Johnson 115 possible fuel problem

Thanks for the reply i have not done a link n sinc but to be honest what exactly is that. Tommorow I plan on doing a compression check what exactly should i be looking for, and if one or two of the cyclinders are different what could this mean. Thanks for all your help and go GATORS!!!

 

[tashasdaddy]

Re: 2000 Johnson 115 possible fuel problem

link & sinc, is the coordination of the spark, and the fuel mix. timing plate/carborators. it is a step by step adjustment process, that is covered in the OEM Johnson service manual for your particular motor. manuals http://www.outboardbooks.com/ or searayman13 on ebay.

compression should be within 10 % range of each other. the closer together the better, post your results.

why don't you join us in May. http://forums.iboats.com/showthread.php?t=291501

 

[redfisher80]

Re: 2000 Johnson 115 possible fuel problem

I did the compresion check today and the results are with the motor cold first starting with the left side if your at the back of the boat. top left was 130psi, bottom left was 135, top right was 120, and bottom right was 135. I let the motor idle on ears at the house for about 25 mins reving it up occassionally, about 25 mins in I was in the house and heard the motor stall so I went outside and tried to start it and it did but then stalled a few seconds later. So I performed another compression check and the results are as such top left was 125, bottom left was 125, top right was 115, bottom right was 130. thanks for all the help. redfisher80

 

[redfisher80]

Re: 2000 Johnson 115 possible fuel problem

So Im starting to think that it doesnt have a fuel problem because when it finally stalls I cant keep the boat running by pumping the ball or using the choke. My next step is to use a separate fuel tank and primer ball and see what it does then. I am almost leaning towards the stator or power pack but I dont know how to test that without having to by a new one and that not be it. I took a look at the stator and it didnt really looked damaged although with all the copper wires it could be really hard to tell. I hooked a test light to the spark plug wires and they dont seam to be missing even when its hot and stalling. thanks for the help

 

[tashasdaddy]

Re: 2000 Johnson 115 possible fuel problem

your compression #s are fine. will it start back up right after it stalls? have you check spark immediately after it quits.

 

[redfisher80]

Re: 2000 Johnson 115 possible fuel problem

The boat will start occassionally after it stalls but only for a few seconds it seems that if I wait for at least an hour it will start again without stalling right away but will eventually in half the time. I used one of those light testers last night that attaches to the spark plug wires it still look like it wasnt skipping a beat after it stalled. I was also thinking it could be a thermostat issuse the block doesnt seem to be nearly as hot as the heads. I dont know just an idea thanks