HELP! Husky 42 Special

[trooney]

hope Tor is around still, but I hope someone can answer my question. I bought the 42 Special from somebody on the site knowing that the piston was bad and thinking that somebody made a piston for it. My ignorance! The saw is in pretty good shape so I'd like to keep it going. After readin 23 pages of Tors thread, I still have that question. What piston will fit in this thing? The piston itself was 35mm in height. The jug said Gilardoni 6, not 241A. Its a 1993 Special. Closed window or open? Its got a closed on it now. Ebay has a 242 Meteor piston that is closed but will it require some work to get it right? Base gasket delete or machining the base? Or does an OEM 42 piston go in it and the difference between a 42 and a 42 Special is the ports. All help would be appreciated.

 

[Agrarian]

The Meteor piston is the correct one for that saw. You would need to measure squish to determine if a base gasket delete was possible.

 

[trooney]

The Meteor piston is the correct one for that saw. You would need to measure squish to determine if a base gasket delete was possible.

Does an OEM 42 piston fit the Special?

 

[Agrarian]

Yes, the same piston was used on 42's from 1988 to 1998. But AFAIK, the OEM piston is NLA.

 

[trooney]

Yes, the same piston was used on 42's from 1988 to 1998. But AFAIK, the OEM piston is NLA.

I found a guy that had 1. So I bought it hoping it was the right one. Thanks for the replies.

 

[Tor R]

The Meteor piston is the correct one for that saw. You would need to measure squish to determine if a base gasket delete was possible.

I would like to believe that there was one AM kit in its time, as the Meteor piston has lowered the crown compared to stock.
At least what Meteor made was not for 42, 42 special or for 242.

Does an OEM 42 piston fit the Special?

Yep, but if you compare against 241A, the latter has a height of 34 mm, if you get the latter you get longer IN duration, which is not necessarily a bad deal.
The old 42 had a Gilardoni piston, 35mm high.

 

[trooney]

I would like to believe that there was one AM kit in its time, as the Meteor piston has lowered the crown compared to stock.
At least what Meteor made was not for 42, 42 special or for 242.


Yep, but if you compare against 241A, the latter has a height of 34 mm, if you get the latter you get longer IN duration, which is not necessarily a bad deal.
The old 42 had a Gilardoni piston, 35mm high.

Yeah. This one had a 35mm piston

 

[David Young]

I would like to believe that there was one AM kit in its time, as the Meteor piston has lowered the crown compared to stock.
At least what Meteor made was not for 42, 42 special or for 242.


Yep, but if you compare against 241A, the latter has a height of 34 mm, if you get the latter you get longer IN duration, which is not necessarily a bad deal.
The old 42 had a Gilardoni piston, 35mm high.

glad you showed up I remembered that I have seen something different in the 42 jug slug combos but couldn't remember the details.

FWIW the 242 piston should work but you will lose some case compression. better than a dead saw though.

 

[trooney]

glad you showed up I remembered that I have seen something different in the 42 jug slug combos but couldn't remember the details.

FWIW the 242 piston should work but you will lose some case compression. better than a dead saw though.

How much? A little or alot? Why would it lose compression? Just asking...

 

[David Young]

How much? A little or alot? Why would it lose compression? Just asking...

Base compression
Squeezes mix from the base into the cylinder.
This is because of the different style of piston. Windowed vs slabbed

 

[trooney]

Base compression
Squeezes mix from the base into the cylinder.
This is because of the different style of piston. Windowed vs slabbed

But the 246 has an open quad port with a windowed piston, correct?

 

[David Young]

But the 246 has an open quad port with a windowed piston, correct?

Yes it does. But the top is bigger what would a bigger top end do to case compression ratio?

 

[trooney]

Yes it does. But the top is bigger what would a bigger top end do to case compression ratio?

But what does a windowed piston do to case compression? Isn't that a case of tit for tat?

 

[David Young]

Widowed lowers case compression. A larger bore on same case will increase case compression ratio all else being equal

 

[Stump Shot]

Q: Who sells a decent windowed piston for the 242?

 

[trooney]

Q: Who sells a decent windowed piston for the 242?

The only one that I've been able to find is one from Lil Red Barn. Can't speak about the quality yet though....

 

[trooney]

Widowed lowers case compression. A larger bore on same case will increase case compression ratio all else being equal

You lower rpms for a little bit more torque? Is that right?

 

[Stump Shot]

The only one that I've been able to find is one from Lil Red Barn. Can't speak about the quality yet though....

Thanks, but I've had my fill of that kind of quality, I'll find something sooner or later.

 

[David Young]

Q: Who sells a decent windowed piston for the 242?

Meteor

 

[David Young]

You lower rpms for a little bit more torque? Is that right?

Less rpm. More torque is not a given.