Motor sputters out shifting from neutral to reverse/forward.

[mr_jman]

I have a 35HP Evinrude tiller (1977). It has electric start and fires right up and idles great. When I shift into forward and reverse and increase the tiller throttle slowly (or fast) the motor sputters out so I have to shift to neutral and repeat. It happens about every time if I stop to fish for even a few minutes before re-firing. After it is running, I can go to a spot and idle down and it'll stay running at slow speeds, but if I shut it off the process starts over again.

Any thoughts... My guesses are bad gas? rich/lean mixture needs adjustment? Let it warm up longer? Idle from neutral and shift into forward/reverse and slowly work up the throttle?

Hopefully it's not more serious, but I'll take opinions and thoughts on this. I'm hoping someone else has gone through this issue as well.

[kerryd15]

Use a little seafoam and new gas. or seafoam in the gas you have. Sounds like a partially plugged jet.

[Rodd]

Check out the link http://www.boats.net/parts/search/BRP/EVINRUDE/1977/35753C/CARBURETOR/parts.html#w.

It is a diagram for your carb.

You want to either clean or replace the "high speed orfice"

It's the high speed jet. I had the same problem with a 1982 25hp evinrude.

[Rodd]

I forgot to mention, that it is part #31 on the diagram.