Johnson outboard 90 horsepower v4

[Sherrie]

Hi, We have a Johnson 90 horsepower v4 model J90TLCCA ? Not sure of the year. Someone said '88 or '89. The motor cranks great. Runs smooth until you demand more power. Then it shutters for a little bit and smooths out again. We have cleaned the carbs and ran some cleaner through it. Changed plugs a few times. Any ideas? Oh, yeah, how can we be sure what year the motor is? I've posted before but I crashed and lost the info. Thanks for any help. Sherrie

 

[JB]

Re: Johnson outboard 90 horsepower v4

Hi, Sherrie.<br /><br />Your engine is a 1988 model.<br /><br />Delays in response can be caused by the ignition failing to advance promptly when the throttles are opened.<br /><br />Check stator movement and response to throttle advance.<br /><br />You might also do a "link 'n' synch" adjustment procedure to be sure that the carbs and the stator are correctly synchronized.<br /><br />Good luck.

 

[DJ]

Re: Johnson outboard 90 horsepower v4

Sherrie,<br /><br />Post your model and serial numbers. Those can be found on the bracket that clamps the engine to the boat.<br /><br />JB's advice is sound. Also make sure your fuel suystem lines are intact and connections are good.

 

[Dhadley]

Re: Johnson outboard 90 horsepower v4

What plugs?

 

[Sherrie]

Re: Johnson outboard 90 horsepower v4

I'll be back as soon as I can with the SN# and the name of the plugs. Thanks so much for your quick responses. The weather is a little unstable here tonight, so it will be tomorrow before I can check. Goodnight and thanks again. Sherrie

 

[fishhawk16]

Re: Johnson outboard 90 horsepower v4

Sherrie,<br /><br />I have a similar issue with my 96 90Hp. I noticed it more when I was pulling a skier. From dead slow in forward, I would push the throttle forward in a smooth and gradual motion, just before the boat starts to plain I feel a little vibration and shutter for a second or two then smooth running. <br /><br />I know I’m not being any help here but was wondering if it was more a “that’s how they run issue” than any thing else?<br /><br />I have only owned this boat for a couple of months and only had it in the water twice.