254xpg help please

[Welder56]

Here's what I'm talking about.

Excuse the bad video. Don't have a bar and chain yet so it's a little harder for me to get a perfect idle. Don't know whether the clutch is functioning properly either.

Repaired tank vent. Had a spare with all the parts I have. I pressure tested the tank acording to the manual. It passed.

Fixed my timing issue. Pulls over way easier now LOL

I believe it may be the carb. All my linkage is working as it should and returning back as it should.

 

[backhoelover]

thats a air leak or binding check it with carb cleaner

 

[Welder56]

I'll have too.

Interesting how I'm getting vac and pressure holding no problem though. Even while I'm turning the saw over.

I installed brand new bearings and the crank was moving freely.

 

[backhoelover]

This is husqvarna seal pullers there is another one I don't have


Sent from my iPhone using Tapatalk

 

[Welder56]

I checked my seals with soapy water while on pressure... nothing leaking acording to my tester

I'm not saying it isn't leaking but I have tested it 3 times and fixed the air leak in the base gasket. After that it's been solid.

 

[Yoopermike]

spray the seals, base gasket and carb gasket while running with carb cleaner or ether, you'll find it.

 

[Welder56]

Just did. Sprayed corner of gasket and revd up. So definitely have a leak either on the base gasket or seal on flywheel side


Thanks a lot fellas.

 

[Agrarian]

Just did. Sprayed corner of gasket and revd up. So definitely have a leak either on the base gasket or seal on flywheel side.

Also use loctite on the cylinder bolts. I had one that was leaking from the bolt threads even though it was torqued to factory specs.

 

[Welder56]

I think it's the gasket. I'll have to try mounting the gasket with a sealant and use loctite on the bolts and see what happens.

 

[Agrarian]

I think it's the gasket. I'll have to try mounting the gasket with a sealant and use loctite on the bolts and see what happens.

That's odd. Is it a new gasket or re-used? I coat mine with silicone grease and never had one leak but I always rebuild with new gaskets.

 

[Welder56]

I don't think it is the gasket now. Got everything stripped down again for pressure/vac test. Wasn't budging at all. I sprayed soapy water around the gasket and nothing. I used a new gasket originally but made my own gasket (with proper gasket material)



Must be the seal holder ffs. Hate taking the flywheel off LOL

 

[Agrarian]

The Husky flywheel puller is worth its weight in gold! Goes from being a major chore to a walk in the park.

I put in several new seals on the flywheel side and did have one fail but it was not the seal, it was the o-ring. The o-ring was new so I don't know what was its problem. I cleaned it up again, applied silicone grease and it was fine. That was the only saw in my signature that passed a pressure test but failed a vacuum test. Normally if they fail, they fail the pressure test (thankfully).

 

[Welder56]

Held pressure for 10 mins without budging.

Held vacuum for 10 mins without budging


Pulled over while testing and nothing.... so can someone explain how it's leaking while running? Or possible explanation

 

[Agrarian]

I don't know if when you rebuilt the saw that you removed the black plastic piece beneath the flywheel that serves as 1/2 of the air guide. The two flat head screws that hold this actually enter the crankcase so if you don't loctite those, they can leak too.

 

[Welder56]

I greased a brand new o ring on that holder too.

 

[Welder56]

I don't know if when you rebuilt the saw that you removed the black plastic piece beneath the flywheel that serves as 1/2 of the air guide. The two flat head screws that hold this actually enter the crankcase so if you don't loctite those, they can leak too.

Will check that for sure! Thanks for that

 

[Agrarian]

Maybe the leak is in the gaskets for the carb? They would not be part of the pressure test the way I do them (sealing plates mounted to the cylinder).

 

[Agrarian]

I just checked to be sure - you also need to loctite the three screws that hold the flywheel seal holder in place because they also are through bored and tapped.

 

[Welder56]

I thought the same thing about the carb gaskets. But brand new gaskets and when sprayed the carb cleaner it was by the front of the cylinder.


So I'm gonna go through all the bolts through the crankcase and put some loctite on them. I'll try again after that

 

[Agrarian]

I thought the same thing about the carb gaskets. But brand new gaskets and when sprayed the carb cleaner it was by the front of the cylinder.

"front side" - do you mean the muffler side?

What vacuum do you use to test with, 10"/hg? More?