Fl350 tuning

**Buggy guy** · 04-12-2015 04:06 PM

Hello all.
I have a fl350 that I cant get to idle, I can set the idle screw all the way in, and it still dies. Only way I can keep running is by giving it a little throttle. I've cleaned carbs. Please help.

**nutz4sand** · 04-12-2015 05:00 PM

Welcome to the site.

You have a two stroke and these need a regular test or you can just run it and gamble

You need to do a crank case pressure test. If the seals are leaking in the crank it will never idle very good and its the start of it wearing out the bottom end and you could melt the piston down if you have a seal leaking and it gets bad enough. Also gaskets and vacum hoses should be checked or replaced if any dryrot on hose to fuel pump.

Also of note the screw should not be all the way in. It should be out 1-1/4 to 2 turns and then adjusted in or out a little.

Do not crank it in to tight or you can cause irrepairable damage.

**Buggy guy** · 04-12-2015 09:33 PM

It's not that it won't idle very good, it won't idle at all. Reeds look good, no air leak in boot, fuel filter is good. I'm stumped.

**LIDUNO** · 04-12-2015 09:58 PM

I'm gonna ask the obvious questions, forgive me if they're too obvious.

Did you try turning the idle screw all the way in or are you talking about the A/F screw?

Have you tried a new plug?

Ever done a compression test?

**nutz4sand** · 04-12-2015 10:10 PM

Originally Posted by Buggy guy

It's not that it won't idle very good, it won't idle at all. Reeds look good, no air leak in boot, fuel filter is good. I'm stumped.

If you think the rubber boot around the carb is the only place air can leak you either need to start learning a lot or paying a good shop to fix it.

Not being rude just truthful.

**Buggy guy** · 04-12-2015 10:40 PM

A/For is 1 1/2 turns out, idle screw is all the way in. I do know about air leaks, did a test with staying fluid. I've had air leak issues with sleds, and I could still get them to idle.

**Bullnerd** · 04-13-2015 12:52 AM

Did it idle before you cleaned the carbs? Or ever?

I'm not familiar with the 350 carb, is the idle screw built into the choke knob like on a bike? If it is, your probably way out of the range of the idle.

**Buggy guy** · 04-13-2015 01:06 AM

The machine was in pieces, got it back together and running, but never able to get it to idle. I have carb off again, going to check jets. Idle screw is separate. It just hold plunger up. Have I feeling my jets are wrong.