3 cylinder 1985 evinrude 75

[weejohn]

i got it over a year ago and it was working ok .so this is the first time i started it since i got it . i went to start it today it would turn but not start . i checked the spark plugs they were black and wet .when it was running over a year ago it was very smoky grey in colour because the man i got it from put to much oil in the fuel so i gather that's why the plugs were black . any ideas what i could do to check to see what the problem is . thanks

 

[boobie]

Re: 3 cylinder 1985 evinrude 75

Do a compression and spark test. Spark should jump a 7/16" open air gap on a tester. If those are okay get into the carbs and fuel system.

 

[weejohn]

Re: 3 cylinder 1985 evinrude 75

the spark is OK . and the compression seems fine .regarding the carb and fuel what should i look for ?

 

[Silvertip]

Re: 3 cylinder 1985 evinrude 75

How did you check spark and how did you check compression. "seems fine" is not a check -- it is a guess.

 

[retiredfornow]

Re: 3 cylinder 1985 evinrude 75

Is it the same gas in it? Might want to start with fresh.

 

[mekkamaz]

Re: 3 cylinder 1985 evinrude 75

Tell us more about the test..maybe you have a spark issue, that?s why all here need to know how do you test....

 

[boobie]

Re: 3 cylinder 1985 evinrude 75

Need more info on tests and what readings obtained???

 

[weejohn]

Re: 3 cylinder 1985 evinrude 75

i am sending away for a compression tester that was i can give the correct reading . i put the spark plug on the side of the block and it was sparking ok . i also cleaned the plugs and set them to the correct gap size . was that the correct way to do it ? the plugs are champion l77jc4 and the gap size .040

 

[weejohn]

Re: 3 cylinder 1985 evinrude 75

i injected fuel in to the carburettor and it started then cut of after a few seconds . how do i check the fuel pump to see if it is that ?

 

[mekkamaz]

Re: 3 cylinder 1985 evinrude 75

Did you squeeze til firm the primer bulb? That should fill carbs just for start and then fuel pump take it over refilling bowls....should run this way, bowls full from priming the bulb, starts and if fuel pump is defective stops in a min or 2.

 

[boobie]

Re: 3 cylinder 1985 evinrude 75

The spark plug on the block trick won't work. Read post # 2 again.

 

[weejohn]

Re: 3 cylinder 1985 evinrude 75

no i never squeezed the priming ball till it was hard ..on my tank i have a breather screw do i tighten it or slacken it before i prim the ball .

 

[LongLine]

Re: 3 cylinder 1985 evinrude 75

open the screw to let air into the tank.

 

[weejohn]

Re: 3 cylinder 1985 evinrude 75

thanks to you all . everything OK now there was a pin hole in the priming hose that's why it wouldn't start it was not getting fuel .