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6hp johnson outboard repair

Cranks good smooth idle speed will not will not open up under load extra smoke heavy oil on water in test tank. all elect. parts chk good

Posted by Anonymous on


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  • 52 Answers

SOURCE: 1974 60hp johnson outboard won't run on full throttle.

Carbs probably need to be cleaned and re-built. Common problem in outboards that havent been run in a while

Posted on Apr 13, 2009



  • 11 Answers

SOURCE: My 1976 Johnson 6hp outboard idles OK,but won't

High speed jet in carb is blocked disassemble carb remove jets and dip jets and carb assm in carb cleaner ( it comes in a gallon can with a parts tray in the can ) available in most autoparts stores BEWARE remove all Rubber O-rings and gaskets before dipping let set overnite or a couple of hours then blow parts off and reassemble. as far as adjustment screws just turn then in until they stop and count the turns then remove them. When reassembleing just reverse the procedure insert turntil they stop then back them out the number of turns that you wrote down. I had to do this with a 1985 150hp V6 with six carbs and it fixed all my problems as well as a 1976 25hp Johnson. Good Luck

Posted on Aug 06, 2009



  • 40 Answers

SOURCE: 9.9 johnson 4 stroke wo'nt idle

Your cabs need rebuild, something is stuck in the carb or air line cracked

If you have rebuilt the carb check for carb gaskett leak that caused and let the air flow in
When to choke is on the air is block and prevent air flow but allowed small amount of air to keep the engine running
After your engine warmed up the heat in the compression burn much faster so you have to let air in by turn off the choke
Good luck

Posted on Aug 20, 2009

Joe Hogan

  • 10865 Answers

SOURCE: 6hp Johnson outboard stalls & quits

go to an auto parts store and get a can of gasoline additive called seafoam. Read the label so you know how much to add to your 6 gallon tank. This stuff works wonders on outboard motors.

Posted on Sep 16, 2009


  • 14 Answers

SOURCE: Honda outboard four stroke misfiring?

I would take it right back to them. It is possible that the fuel lines were not changed or at least flushed before they put the new carbs on. It must have been in bad shape if you had to replace the carbs. Although, sometimes that is cheaper than a carb job.

If is very possible that some debris left in the fuel system or fuel pump that is caught in one or more of your carbs. It only takes one on a 25hp to make it run bad.

This sometimes happens even if the lines were flushed. I see it every once in a while. We try to catch it before it leaves by running it under a load at the water for a while to be sure everything is working right.

Since you put a water separating fuel filter on, it appears that there was a problem with water. Again if lines were not flushed, water could still be in the lines.

Before you take it back, drain each carburator into a glass jar and see what the fuel looks like. If it have water or debris it will settle to the bottom. If you find some, just flush the system until no more water or debris comes out. Then see how it runs.

You should always use some sort of fuel treatment like PRI-G or Sea Foam to keep the fuel fresh and to minimize the effect of the ethenal in the fuel.

Hopefully, the dealer can find the problem fast and at least give you a break on cost. We would normally do it for free if the customer brings it right back and it appears that we missed something.

Posted on Sep 17, 2009

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