Help! at a loss with erude 150

[lastout]

hey folks, i have a 1984 erude 150 that is used on a 1894 welcraft step-v..a pretty heavy boat. i have always turned 4800 rpm's at wot and run about 36 mph. all the sudden i am turning 4000 rpm's and running 28-30 mph. i know the rpm's were low anyway but thats the way its been since i bought it. i have 95 on all cylinders on compression test, i have replaced the coils, plugs, plug wires, fuel lines and filter and cleaned the carbs. this is a pre-mix engine. i can't find the problem and was hoping you folks may have an idea. THANK YOU all for reading and helping!

 

[lastout]

Re: Help! at a loss with erude 150

sorry, 1984 wellcraft...darn dislexia

 

[Dhadley]

Re: Help! at a loss with erude 150

Just for kicks look at the tach to make sure its set on position 6.<br /><br />The good news is that the compression is even. It may just be losing fire to one cylinder at wot.<br /><br />If you lost the rpm after the carb rebuild it could just be a linkage problem. Make sure the carbs are opening all the way and the timer base is moving all the way to the stop.<br /><br />Check the timing. Make sure its correct.<br /><br />Once you get her running right again, work on the set up to get the 1000 rpms you need. It'll live much longer.

 

[groundpilot]

Re: Help! at a loss with erude 150

Let me know your final solution ... You just described my problem exactly . Slight difference is that mine is an 82 and I have lost 1000 r.p.m. and 10 miles an hour . Even did the decarb procedure .