2004 Evinrude 150 HO

I need help. This 150 which at speed runs great sometimes drives me crazy. When running from one spot to another and I come down off plane it will sometimes idle really rough. When it does that it is hard to start on the next move. When I come down and it is idleing smooth it will start right up and no problem. When it is hard to start and it finally does start I get a lot of blue/black smoke and it stinks something terrible. Has anyone else had this experience?????? Help me if you can......

Don

What kind of oil are you using?

Evinrude XD50

There is a possibility that I may have gotten some XD30 because I buy it bulk from my dealer and the barrels are side by side. The kid that pumped it may have gotten the wrong barrel. Do you think that would make a difference????? thanks

My opinion is MAYBE LOL. I would drain the oil and try the other first. Then I would check your plugs or just replace them. If that doesnt work maybe try a hotter plug. If that doesnt work then do a compression test on the cylinders just to be safe.

it sounds like it is getting flooded out or chocked win u come off plane does this make any since

you would know if you have XD30 or XD50. The XD30 is red, and the XD50 is blue/green if i remember right. But i do know there is a large color difference.

I have heard only an etec mechanic can determine what the problem is. I have also heard that the spark can get pretty gummed up. They are a very fickle motor.

Thanks for the help guys....I fished a 3 hr tournament this evening on the river. I filled it up with 89 octane gas instead of the 87 and added a dose of injector cleaner. It ran really well and I picked up about 400-500 rpm. I did have trouble starting it a couple of times. If anyone else has any ideas please feel free to jump in.....

Don

[QUOTE=HoosierDon;373602]Thanks for the help guys....I fished a 3 hr tournament this evening on the river. I filled it up with 89 octane gas instead of the 87 and added a dose of injector cleaner. It ran really well and I picked up about 400-500 rpm. I did have trouble starting it a couple of times. If anyone else has any ideas please feel free to jump in.....

Don[/QUOTE]

Watch the higher octane fuel............might burn HOTTER........may damage your power head.

Later,

Geo

Maybe run some Seafoam in the fuel and also spray it through the carbs while running!