husqvarna 2100cd with stihl ms660 carb swap

[crapsman_mowers]

so i got a husky 2100, and i could not find a carb for it at all. i found that someone put a 395carb on one and ran great. i had a 660 carb laying around and modified the intake block for an impulse port and put the carb upside down. i was impressed with how it turned out and ran really well.
is there any difference between the size of the 2100 tillitson carb and a walbro 660 carb?

 

[Bob Hedgecutter]

Never done it, never had the need- but did similar recently swapping the carb from a Stihl 051 onto a Mac 125 Super Pro.
As long as jetting and Venturi sizes are similar, my guess it will work, but you loose the safety feature of the governor.

 

[crapsman_mowers]

Never done it, never had the need- but did similar recently swapping the carb from a Stihl 051 onto a Mac 125 Super Pro.
As long as jetting and Venturi sizes are similar, my guess it will work, but you loose the safety feature of the governor.

my old 2100 carb i deleted the governor but i swapped that carb onto my pro mac 700, and im considering racing this saw. i have to get a new piston though because i melted the old one with the original carb
im not sure which one to get, proline which is made in brazil or one thats made in taiwan

 

[crapsman_mowers]

Never done it, never had the need- but did similar recently swapping the carb from a Stihl 051 onto a Mac 125 Super Pro.
As long as jetting and Venturi sizes are similar, my guess it will work, but you loose the safety feature of the governor.

exhaust side

 

[Bob Hedgecutter]

exhaust side

Exhaust side? With visible piston locator pins?

 

[Bob Hedgecutter]

my old 2100 carb i deleted the governor but i swapped that carb onto my pro mac 700, and im considering racing this saw. i have to get a new piston though because i melted the old one with the original carb
im not sure which one to get, proline which is made in brazil or one thats made in taiwan

I have heard the one from Dukes works- they offer moly coated ones and plain.
Personally have never tried a non OEM and still have a late 2101 piston new in box in reserve.

 

[crapsman_mowers]

Exhaust side? With visible piston locator pins?

i remember putting to caber rings in it several months ago and ran 4 tanks of gas through it when it had the irginal carb and it did run really hot, and i heard if it gets hot it tipically scores the exhaust side of the piston, its still runs though atm i just sanded the piston a bit and re honed the cylinder but i will replace the piston

 

[crapsman_mowers]

I have heard the one from Dukes works- they offer moly coated ones and plain.
Personally have never tried a non OEM and still have a late 2101 piston new in box in reserve.

i havent been able to find a dukes piston yet but i know they make good parts

 

[Bob Hedgecutter]

i remember putting to caber rings in it several months ago and ran 4 tanks of gas through it when it had the irginal carb and it did run really hot, and i heard if it gets hot it tipically scores the exhaust side of the piston, its still runs though atm i just sanded the piston a bit and re honed the cylinder but i will replace the piston

They dont run real hot unless something is real wrong as a rule- and Husqvarna recommends 33:1 for them.
Properly tuned, leak free and sharp chains- should not overheat.
Delete the governor and tune lean to get some kind of max rpm and then some- then you might be in trouble.

 

[Bob Hedgecutter]

@Norm- you should be able to advise on these old muscle saws.

 

[crapsman_mowers]

They dont run real hot unless something is real wrong as a rule- and Husqvarna recommends 33:1 for them.
Properly tuned, leak free and sharp chains- should not overheat.
Delete the governor and tune lean to get some kind of max rpm and then some- then you might be in trouble.

not sure, i run 40:1 with klotz racing 2stroke oil and i dont run it very lean. right now i have it a little bit snappy full throttle

 

[crapsman_mowers]

They dont run real hot unless something is real wrong as a rule- and Husqvarna recommends 33:1 for them.
Properly tuned, leak free and sharp chains- should not overheat.
Delete the governor and tune lean to get some kind of max rpm and then some- then you might be in trouble.

im probably sitting around 12k rpm full throttle id have to check again

 

[Fabz]

I’ve got a few runners and plenty of parts …

 

[Fabz]

This one just might win a few races with a better chain …