johnson 90hp v4

[bayliner1972]

Had no reply on my previous question, so I will try again. I still cant get my motor to run the way it should. It starts up when i prime but dies on me within seconds. If i then reprime it floods. After a while the motor will run but not nice at all. I have broken down the carbs 4 times and used a good carb cleaner and blown it out with compressed air. All this does not solve my problem. Is it also very expensive to overhall the motor ??

 

[JB]

Re: johnson 90hp v4

First, kevin, you did have replys.<br /><br />Please supply the model number of your engine.<br /><br />Do you have a Service Manual? You should not attempt to service an outboard without one.<br /><br />Have you done a compression check?<br /><br />Have you tested the fuel pump?<br /><br />Do you have a water seperating filter on your fuel line?

 

[bayliner1972]

Re: johnson 90hp v4

the model number is BE90TLCDC<br /><br />Fuel pump OK<br /><br />seperating filter OK<br /><br />compression OK<br /><br />No service manual<br /><br />If I no its worth stripping and rebuilding the motor I will get a service manual, but i eed to no if this is an expencive job or not ??

 

[JB]

Re: johnson 90hp v4

That is a 1986 engine, Kevin.<br /><br />Can you be more specific on the compression numbers?<br /><br />Yes, it is worth stripping and rebuilding that engine, IF it needs rebuilding. If it does not need rebuilding it would be a waste of time and Euros.<br /><br />"Expensive" is a relative term. It would be a lot less expensive than replacing the engine.<br /><br />You have three carburetors. The probability that all three have the same fault is remote. Your engine should be able to start and "run" on one carb with no load.<br /><br />I strongly recommend both an Owner's Manual and a Service Manual. The OM might cause what seems a minor change in your starting technique, and the SM might well keep you from destroying your engine.<br /><br />Good luck.

 

[reeldutch]

Re: johnson 90hp v4

jb,<br /><br />i think this is a v4 we are talking about.so only 2 carbs. <br /><br />kevin mix some fuel 50:1 and fill a plantsprayer.<br />take the silencer cover off from the carb and let somebody crank the motor while you are spraying gas into the carb intakes.<br />if this keeps the motor running check your fuelpump or look for kinked fuelhose.<br />also check the vent of your gastank.<br /><br />good luck