Silicon and chainsaws

Arborist Forum

Help Support Arborist Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

muddstopper

Addicted to ArboristSite
. AS Supporting Member.
Joined
Nov 20, 2011
Messages
7,133
Reaction score
16,815
Location
mountains of nc
Well, just got my azz ripped for using silicon to rebuild a saw with. I have a old 55 huskey, I have worte about it in other threads. Anyways, I had rebuilt this saw 3 times trying to get it to run right. First time was with a china p/c, the second time with a cp Hiway kit, and this time with a new oem p/c kit. I have way more in this saw than its worth, but I refused to be defeated. Anyways, Having ran out of good gaskets, I decided to put a little silicon on the carb gaskets and reuse it. I took great care in making sure no glue was in the impluse tube and was very sparing putting any glue on the gasket. Saw cranked and ran like new. test cuts on small dia wood and I was smiling ear to ear. Finally I had a saw that would run. I then stuck the saw in a 30in dia white oak, Saw was cutting best it could considering it had a wornout safety chain on a 18in bar. About halfway thru the log, the saw changed tunes, like the carb was out of adjustment. Well, having burntup one kit (the china kit),already. I just cut the saw off and waited till this morning to take it to the shop. Well, they pulled the top cover off and seen the silicon and started giving me heck. Took carb off and took apart and inside the carb was silicon. Removed jets and washed silicon out of the jets, out of the screen and just about every orifice in the carb. Put everything back together and saw again runs like a new one. I got to hear how the swedish spent million perfecting the build on those chains saws and how you dont see any silicon on a new saw. I was asked questions like, "Do you think I'm smarter than the folks that built the saw. And a few more comments that just aint appropriate for a public forum. Oh well, It took three attempts, and a little friendly ribbing, but finally the saw runs like I think it should.
 
The silicon I was using isnt really silicon, its a copper something or other for high heat and is supposed to be gas resistant. I thin I just got glue in the impluse and it got sucked into the carb. Any ways, its seems good for now.
 
Not going to read your wall of text, but ultra black or grey will work fibe. It's equivalent to most OEM sealants.
 
Good it is going fine now. Yeah silicone and gas don't like each other.

Found that out the hard way at around age 13 when I built a Honda ATV engine that was in coffee cans. Was out of an 80s 3 wheeler and had been put in a go cart.
Couldn't get carb gaskets so I used silicone. Ended up plugging it up bad.
 
I have heard that before, but I have never, ever seen any of those products sold around here
Your local Yamaha bike dealer will have Yamabond 4.
I've had good luck with "The Right Stuff" too.
But to be honest, if the sealing surfaces are cleaned up well, you don't normally need sealer on a quality gasket. I like to use a razor blade and an oiled fine sharpening stone to carefully clean the surfaces to "like new". Then a brand new dry gasket is all you will need
 

Latest posts

Back
Top