Chain Saw Troubleshooting Question

[RoySC]

Husqvarna Chain saw Mode 435:

Looking for some troubleshooting hints before I get started.

Problem: It"s very hard to pull the starter; like it"s too much compression. When I remove the spark plug it pulls fine. Hooked up a compression guage I got a max reading of 90 PSI but again I had to struggle with the pull start to get a reading.

Bottom Line: Spark plug in: very hard pull, out: easy pull.

Appreciate any suggestions on next troubleshooting steps.

Thanks!

 

[Bret4207]

Start with the simple stuff. Has the starter puller arbor been lubed? Is anything binding? Is the pulley cracked? Is the flywheel loose? Does it have a decompression button?

Beyond that, have you run it? How does it run? Is this a new or used saw? If it's new they tend to take a little while to loosen up. If used it could be big problems like a bad crank or scored cylinder or it could just be a nice tight saw that takes some muscle to pull over.

 

[Anonymous-0]

I have the same problem with a model 36 Husky. Saw ran fine for 3 years. I cut about a cord of wood a year for the hunting camp. When and if the saw starts it runs fine. Had the rewind starter apart and everything is OK - took the muffler/spark arrester off and could find no problems.

 

[Bob - MI]

Hard to pull with the plug out?

 

[Bob Huntress]

Does 435 have a black button just forward of the spark plug? Mine is a 450 and the button is to release compression for starting. I don"t know if the 435 is so equiped.

 

[LJD]

Is the pull rope original? If it's been replaced and it's too short, it will pull a lot harder. Too short a rope give less pull leverage because the diameter of the circle it pulls from is smaller.

 

[Southern Ray]

I have a Mac 130. Being left handed it's hard to hold it with my right hand and pull the rope with my left hand.
I clamp it in my vise and pull start it.

 

[Anonymous-0]

My 350 has a decompression button.

 

[RayP(MI)]

Possible loaded up with oil in the cylinder? Mine has done that once in a while. Several pulls on the rope later, and it seems to be OK again. Always assumed there was fuel/oil collected in the cylinder making the compression very high.

 

[55deere70]

Geez, a 435 is a small saw, should not be hard to pull over even without a compression release.