decarb didn't fix the issue, '79 Johnson 150hp

[roughshot]

Well, over the past two weeks I've run 4 liters of seafoam thru my motor in hopes that it would clean out what ever was keeping my motor from running at idle.

Here is the issue, the motor will idle but will starve out after 20 or 30 seconds, won't shutter, just cuts out. If I pump the choke in the key, it will keep running.
After starting and at idle, the motor seems to have a spot early in the trottle up were it will bog or cut the motor out completely, again, if I pump the choke, it will keep running.

mid range and wot run beautifully no shutter or hiccups and definatly runs better now after the decarb.

Thoughts? Solutions?

Thank you.

 

[hidef]

Re: decarb didn't fix the issue, '70 Johnson 150pm

Re: decarb didn't fix the issue, '70 Johnson 150pm

Time to clean / rebuild the carb(s) you have crap in the slow speed jets and the seafoam didn't get rid off it. Take them apart thoroughly clean everything and reassemble with a new float and needle valve. Make sure you pull all the welch plugs and git the junk out of all the passages.

 

[ONERCBOATER]

Re: decarb didn't fix the issue, '70 Johnson 150pm

Re: decarb didn't fix the issue, '70 Johnson 150pm

agreed clean your carbs up nicely.. paying special attention to the jets and your idle will return

 

[Silvertip]

Re: decarb didn't fix the issue, '70 Johnson 150pm

Re: decarb didn't fix the issue, '70 Johnson 150pm

The lesson here is to run SeaFoam or any other fuel system conditioner continuously in recommended quantities to KEEP the system clean. Once a jet or passage is plugged the "cure" you are trying to pass through that passage or jet cannot make the trip.