Motor bogs when trimmed down

[titelines]

I have a 1991 Suzuki 175 2-stroke.  Still runs great (if not a little cold from time to time), but I've noticed that when I trim it all the way down it tends to bog and sputter at idle. It usually won't idle for long in this position before quitting on me.  It's fine with throttle, and it's okay at idle when trimmed up a bit, but there's something about being trimmed down it doesn't like.  Any thoughts?  Thanks!

[delcecchi]

That is a carbed motor, right?  float level a little off, or maybe not floating so well? 
Trim all the way down and it is too lean...

 

Or maybe too rich

Edited May 13, 2017 by delcecchi

[swamptiger]

15 hours ago, titelines said:

I have a 1991 Suzuki 175 2-stroke.  Still runs great (if not a little cold from time to time), but I've noticed that when I trim it all the way down it tends to bog and sputter at idle. It usually won't idle for long in this position before quitting on me.  It's fine with throttle, and it's okay at idle when trimmed up a bit, but there's something about being trimmed down it doesn't like.  Any thoughts?  Thanks!

 

Idle jets are probably gunked up with oxidized fuel from sitting.  I would run it for awhile to see if it comes out of it on its own.  If not, pull the carbs and give them a good cleaning.  You will probably need carb gaskets or maybe a carb kit when you do this.

[titelines]

Thanks guys - that gives me a starting point.  It's gonna be on the water a lot this week, so I'll see if I can run it out of it.  If not, I'll give it a good cleaning afterwards.  I've used non-oxy the past few years hoping to eliminate the gunking, but I'll check these other areas.

 

Thanks again! 

[leech~~]

Check to see if your gas lines getting kinked when in that position also.