50 hp Evinrude

[visionary1]

So I have an issue that really has me miffed. I have a 50hp evinrude two cylinder I did a compression check on the motor and I have 120 psi in both cylinders. I have good spark on both, Cleaned the carbs, replaced the main fuel line. i take the boat out and she fires up great I had to adjust the carb a little bit but all in all she is running smooth. I take it out and down the channel. the channel is about 3/4 of a mile long of no wake I make it all the way through there no problems. I get to the lake I put the hammer down and she purrs like a kitten. I run about a mile to our favorite redneck yacht club site and hang out for several hours. when i went to leave she fired right up and as i gave her throttle I could get nothing out of her i had the hammer all the way down and it would go about 5 miles an hour and it sounds like it is missing a cylinder periodically. I just don't know what to look for anymore on this motor... good compression,spark,fuel it is all there I am at a loss.

 

[Andy in NY]

Re: 50 hp Evinrude

could have some dirt or something that lodged itself in the jets in the carb...

 

[tashasdaddy]

Re: 50 hp Evinrude

not enough info, please read this http://forums.iboats.com/showthread.php?t=250879

 

[visionary1]

Re: 50 hp Evinrude

what info do you need I am sure i could provide.

 

[Tim Frank]

Re: 50 hp Evinrude

what info do you need I am sure i could provide.

It is all in the request from TD.

not enough info, please read this http://forums.iboats.com/showthread.php?t=250879

 

[visionary1]

Re: 50 hp Evinrude

not sure what i left out other than the model number of the motor. I am new to this so please bare with me.

50 hp evinrude 1990

50etlesr

 

[Tim Frank]

Re: 50 hp Evinrude

not sure what i left out other than the model number of the motor. I am new to this so please bare with me.

50 hp evinrude 1990

50etlesr

That's why it was suggested you read that link....

Is the motor new to you?
If not how has it run in the past? Any late season problems last year?
Were you checking compression for a specific reason....or just because...?

It is tough enough to make suggestions from a distance, it helps if you can paint as accurate a picture as possible of where you are, and how you got there.

 

[visionary1]

Re: 50 hp Evinrude

the motor I have owned for several years however it has sat in my garage for about a year with out use. Last spring I used the boat early in the season but sold the boat with out the motor. i "winterized" it for storage and it has been sitting since about last may or june. I did a carb clean and when i had this problem last weekend i did a compression check just to make sure that wasn't my problem. For the last several years this has been a great motor for me and has always performed well. i don't understand how when i left the dock everything was running great and then after sitting for a couple of hours I have no power what so ever. it idles fine but wide open I get about 5 miles an hour out of her.

 

[Rick.]

Re: 50 hp Evinrude

Could be your fuel line flaked off a bit of rubber into the carb. They all work perfect until they don't work. That's the internal combustion engine. Frustrating. I think I would look at the carbs. again. Best of luck.