Yamaha Timberwolf 250 need help

[Gwbarm]

Sounds like you are getting spark if it starts on starting fluid have you cleaned the carb

[Mech]

If it runs on starting fluid then the spark is ok..  You need to work on the fuel supply..  Is fuel getting to the carb, is it getting right inside the carb, is there enough of it to run the bike ? If it's getting plenty of fuel right to and through the carb(undo the drain screw to check), then the carb needs cleaning inside.

Edited April 23, 2023 by Mech

[Atvguy0901]

I took the carb apart and cleaned it with carb cleaner. And it’s getting fuel to carb pull line off and it was getting fuel can’t seem to get it to run longer then a second.

[Mech]

Did you try undoing the drain screw on the bottom of the carb and checking fuel flows right through ?

Did you take the jets out and clean them, blow through them, and look through them when you sprayed it with carb cleaner ?

Edited April 24, 2023 by Mech

[Mech]

Whe you try to start it, and it doesn't start, if you pull the spark plug out then is it wet ? That will tell us whether it's getting fuel or not.

[Atvguy0901]

I took the carb apart and cleaned it with carb cleaner. And it’s getting fuel to carb pull line off and it was getting fuel can’t seem to get it to run longer then a second. Ok thank you I will try that and report back

[Gwbarm]

Sounds like air leak at manifold or not enough fuel.

[Mech]

And just to be quite clear about this Atv..  when it runs on starter, fluid it does run for more than a second right ? If you keep giving it a squirt every half second or so it will keep running.. ?

If it does then it's a shortage of fuel causing the problem, but, if the one second is consistent no matter what it's burning, then it suggests there is an electrical problem.

In that case you want to connect a strobe timing light to it and watch to see whether the light keeps flashing right down to the very last rotation of the motor, or whether the flashing stops and then the motor slows down to a stop.

 

[Atvguy0901]

When I spray in the carb it runs for a second and then cranks but if I keep spraying it tryed to start but won’t. I am going to look into it this weekend when I get time and see what’s going on

Also this was on the fuel petcock 

[Atvguy0901]

That’s what it looks like 

[Gwbarm]

The one that came out is in bad shape, that's certainly part of your problem.