Reply To: Evinrude 5.5

[Don]

james hobson wrote:

No I have had motor for 2years it always ran good but did not idle very well so I decided to rebuild carb to see if that would help and yes that did help ladles pretty good still using old pressure tank cleaned very good added inline filter , high speed meddle is fully seated threads and needle very good condition, no bowl was not dropped float set correctly new float needle I bought factory rebuild kit so I am sure it’s good you know if I run at 16/1 will that not make it run even more rich from what I read on line everyone says to run 24/1 that’s what the factory recommended when it was new and oil today is much much better. Anything else you can think of.

OK, well it’s it your outboard, but I would disregard the 24:1 advice…16:1 was the factory recommendation and what should be used today, regardless of “today’s improved oils”….

So, the engine ran OK/not rich at high speeds before you rebuilt it, correct? I realize you used a new OEM kit, but it seems like there is something wrong/leaking somewhat…Perhaps the inlet needle/seat/float is defective…But again, I would think the engine would run too rich at idle as well, but who knows. Doesn’t seem likely that the pressure tank is developing too much pressure over riding the float, but suppose that is possible. I guess you could try loosening the cap/relieving the pressure while the engine is running poorly to see if it cleans up/goes lean.
As far as the high speed needle seating properly, I thought of one more test to confirm this: Remove the bowl and seat the high speed needle into the nozzle. Now, with an eye dropper or syringe, squirt a little fuel down inside the high speed nozzle. The fuel should not leak out of the nozzle into the bowl…. The only other issue could be that for some reason, the nozzle gasket is not sealing properly, have a close look at the sealing surfaces…
Post some pictures if you can….