High Quality Chainsaw Bars Husqvarna Toys

Ms462 base gasket delete

TX_Welder

Super OPE Member
Local time
7:46 PM
User ID
10778
Joined
Oct 22, 2019
Messages
185
Reaction score
536
Location
SE Texas
Country flag
Anybody done a base gasket delete on a 462 ? Checked the squish on mine and its .038 right now. Thinking about doing a delete, timing advance and a muffler mod.
 

BonScott46

Pinnacle OPE Member
Local time
2:46 AM
User ID
1571
Joined
Jul 20, 2016
Messages
1,056
Reaction score
3,560
Location
Sweden
Country flag
Don't these units run at .030 from the factory with a .020 gasket?
 

wap13

Super OPE Member
Local time
8:46 PM
User ID
6201
Joined
May 20, 2018
Messages
205
Reaction score
332
Location
Ga
Country flag
I'd like to see how this works out for you if you dont mind sharing here.

I have a stock 462 that impresses the heck out of me but have been considering a BGD. Once my other one gets back from Randy I'll start to tinker with the stock one.
 

Bigmac

Mastermind Approved!
Local time
5:46 PM
User ID
5937
Joined
Apr 19, 2018
Messages
5,436
Reaction score
37,561
Location
Oregon
Country flag
I thought I saw something about interference when deleting the base gasket on these … am I wrong???
Ed it sounds like the majority will interfere, the op has one with excessive squish from the start! I am guessing the base gasket is .015 like the 661. Stihl’s factory squish can be all over the board, I have a stock 660 that has .019 squish with gasket, also have an odd ms260 that had excessive squish and I could do a base gasket delete, the ms260 is not supposed to be able to bgd either. Ms 461 I have seen about.007 difference in several jugs and 660 have seen .016 different between different factory jugs.
So always measure! Lol
 

TX_Welder

Super OPE Member
Local time
7:46 PM
User ID
10778
Joined
Oct 22, 2019
Messages
185
Reaction score
536
Location
SE Texas
Country flag
So I misremembered on my squish. squish was .033 gasket was .015 leaving .018 for head room. Is that okay for clearance or should I massage it to .020 ?
 

TX_Welder

Super OPE Member
Local time
7:46 PM
User ID
10778
Joined
Oct 22, 2019
Messages
185
Reaction score
536
Location
SE Texas
Country flag
Saw has a lot of carbon build up for suposedly being a low hour machine. Supposed to have had around five tanks through it. I'm second owner and I've put about two tanks through it running stihl ultra doing some clearing work.
 

Bigmac

Mastermind Approved!
Local time
5:46 PM
User ID
5937
Joined
Apr 19, 2018
Messages
5,436
Reaction score
37,561
Location
Oregon
Country flag
.018 is my max tight on the cc class if your properly measured the squish, not a knock, you need to roll the motor multiple times and measure at the wrist pin it looks like you checked above the exhaust? If you decarbon everything it will change too
 
Last edited:

TX_Welder

Super OPE Member
Local time
7:46 PM
User ID
10778
Joined
Oct 22, 2019
Messages
185
Reaction score
536
Location
SE Texas
Country flag
@Bigmac Yeah that's what I was thinking. By the time I clean everything up I'll probably get my .002 back. I did check above the exhaust, I see what you're saying. It hadn't occurred to me to check over the wrist pin. I'll clean it all up torque it down and recheck.
 

Bigmac

Mastermind Approved!
Local time
5:46 PM
User ID
5937
Joined
Apr 19, 2018
Messages
5,436
Reaction score
37,561
Location
Oregon
Country flag
@Bigmac Yeah that's what I was thinking. By the time I clean everything up I'll probably get my .002 back. I did check above the exhaust, I see what you're saying. It hadn't occurred to me to check over the wrist pin. I'll clean it all up torque it down and recheck.
Ya do that, the piston rocks when you check above the exhaust or intake and give a false reading, I had a 461 the would turn over with a base gasket delete because of carbon build up, de-carbon the chamber and .016 squish, sanded out .002 from the chamber with an old piston and stick on sandpaper
 

Bigmac

Mastermind Approved!
Local time
5:46 PM
User ID
5937
Joined
Apr 19, 2018
Messages
5,436
Reaction score
37,561
Location
Oregon
Country flag
.018 is plenty, that’s what my 066 was stock.

I do know of numerous 120cc work saws built with .015 and never an issue.

stihl ultra is not your friend
So what’s your max on a 70cc saw?
 
Top