70' 33hp evinrude electric start running slow

[mlarson29]

not sure whats wrong with it. new fuel lines, plugs, tank. ran fine the first two time this season but wont go any faster than like 5km an hour.
here is a video of it working fine
https://www.youtube.com/watch?v=fYFTa4hwL48
and here is how it runs now. sounds fine, this is the fastest it would go with the high speed carb setting at its best setting.
https://youtu.be/_n-PhQApung

 

[racerone]

Do you have spark on both cylinders ?

 

[F_R]

Actually, I'm kind of impressed that it is going that fast now. But as racerone said, check the spark. It almost certainly is running on one cylinder and you need to isolate and fix the reason. Could be as simple as a spark plug, or much more serious.

 

[mlarson29]

Ok I'm gonna get a compression tester and a spark tester from the store and see if I can get a spark. Hopefully it's just as simple as fouled plug or a broken coil.

 

[mlarson29]

twas the coils. they were cracked super bad. i changed the pump in the beginning and it made a small increase in speed then i thought what the heck might as well pull the flywheel and low and behold they were both cracked severely. replace those and went for a test ride and she was back and no surging like it did before.