1976 Evinrude 15HP

[irishwalleye]

Started bogging down then quitting while at full throttle. Tried everything and noticed that if I pulled out the choke a little as I heard it starting to die it would come back to life.

Carburator just dirty or is it starting to die? Recommend a quality carb cleaner?

Thanks

[jentz]

The carb needs removed and soaked and cleaned, then a new carb kit installed.Pretty easy if you can use a wrench and screwdriver.

[hydro]

While you're at it, replace the O-rings in the fuel line connectors. If they leak air it will produce the symptoms you describe.

[wastewaterguru]

if you are applying choke to keep it running, then it's leaning out. You don't want to continue to run it that way very long........

The lean condition can be from lots of things.....

1. bad vent on fuel tank (vacuum locking fuel system)- try running with cap loose on tank.

2. Weak fuel pump. Does squeezing the primer bulb bring it back to life like the choke does? Does the primer bulb get hard and stay hard??

3. Air leaks into fuel lines.

4. Air leaks into crankshaft seals

5. Fuel restriction in carburetor

6. Bad primer bulb

[irishwalleye]

Does it matter that it runs just perfectly normal at pretty much anytime BUT wide open throttle?

And this problem just started on Sunday. No issues prior.

[Maverick]

Try a new hose with a new primer bulb. My brother in law had exactly the same issue a few years back. Put on a different hose and it worked like a charm. Those hoses don't last forever.