jspen

My Feedback: (121)

I recently bought a used ys.91ac , mounted it and started to tune it when I found air (and fuel) bubbling from around the base of the high and low adjustment needle. Motor seems to run o.k. I did not go any further when I noticed the problem.
Is this impairing the performance? I do not have a manual or diagram for the engine so I am not sure if it is an o-ring or worn out parts.
Any suggestions would be great. Is there an exploded diagram for this engine?
Thanks

Dave Shadel

It probably needs an o-ring set. Take a look at the 110 exploded view and it will shoow what you need. The parts are the same unless you have the old style chrome colored HS needle.

If you need an instruction sheet, PM your address and I will see that you get one.

4*60

My Feedback: (41)

Try this
http://slams.ca/temp/YS91AC_Manual.pdf

Best I can do. I'll leave it there for a few days.

jspen

My Feedback: (121)

Dave,
I wanted to thank you again for your help and expertise.
It is nice to have a forum that you can get so much help from.
I appreciate your help and I am sure everyone else does too.
Thanks

Dave Shadel

My pleasure. Anytime you need some help, don't hesitate to contact us.