'88 Johnson 48 SPL stalling with throttle.

[Kevin70]

I recently sold two 1988 Johnson 48 SPL's and one of these motors, which used to run perfectly, is having a problem. The only think worse than having motor problems is unknowingly selling motor problems to someone else.

The motor cranks with ZERO hesitation and idles perfectly, but when ANY throttle is applied, it bogs down and stays down. It won't shut off, it just becomes a very slow idle.

The carbs have been cleaned and are like new. The power pack has been replaced by the one from the other motor. Both plugs are sparking great.

The lagging is so immidiate when any throttle is applied, I'm inclined to believe it is an electrical problem and not a fuel supply problem.

Can anyone help me salvage my reputation with this very honest and hard-working fella' who bought my boat????

 

[tashasdaddy]

Re: '88 Johnson 48 SPL stalling with throttle.

check the spark on both plugs, it will idle on one cylinder. also was a link n sinc done after the carb rebuild. did you do all this? these are 48 spl carbs.
http://forums.iboats.com/showthread.php?t=244013

 

[Kevin70]

Re: '88 Johnson 48 SPL stalling with throttle.

Thanks TD. Could breifly explain what a link n sink is. Pardon my ignorance in this matter.

 

[tashasdaddy]

Re: '88 Johnson 48 SPL stalling with throttle.

Kevin, it is the coordination of the spark sequences and the carbs. so that the spark advances and the same time as the carbs open. it is a step by step process, that is covered in the oem manual, which i do not have for that motor.