1992 25hp evinrude goes dead

[sambrigman]

My motor starts fast, but goes dead like running out of gas. Carb has been cleaned, new fuel lines, new fuel pump.Primer bulb stays hard, I don't think there is a air leak or gas leak. I have been working on this for a month. I feel like an iddiot, not being able to solve this. Any suggestion or ideas greatly appreciated, i am at wits end. Thanks guys

 

[kbait]

When it dies, will it re-start immediately? If not, check for spark. If spark won't jump 1/4+" from both leads in open air, you have an ignition issue. If spark is fine..I would assume a fuel delivery issue...and then try squirting a bit of fuel in carb throats when it begins to die - if it helps, then fuel starvation.. if it dies even faster, then flooding condition. Perform tests and post back w/results. Good luck!

 

[oldboat1]

last year's fuel, maybe? tank vented?

 

[sambrigman]

new fuel, tank vented

 

[oldboat1]

spark test with an adjustable tester, like kbait suggests. Would test compression as well. That carb has a idle mix needle, and might need adjustment. Starting point is probably 2 1/2 turns open, or whatever the manual suggests, then adjust clockwise initially.

 

[ondarvr]

The squeeze bulb shouldn't stay hard after the motor starts, but it shouldn't collapse either.

​Try squeezing the bulb as it starts to die.