High Quality Chainsaw Bars Husqvarna Toys

Dolmar 64xx/73xx/79xx series, smurfs and solo 665/675/681 thread

PA Dan

PA Dan

Mastermind Approved!
Local time
5:42 AM
User ID
306
Joined
Dec 28, 2015
Messages
6,987
Reaction score
34,459
Location
White Oak PA
Country flag
Simondo said:
@PA Dan
In case it helps having the factory spec.....

View attachment 199709
Click to expand...
Thanks! As Drew mentioned yesterday I am running a Walbro HD12 right now. I have the Zama but am not finished with the mods I wanted to do on it. Should be finished within a week and I try it on the saw.
 
huskihl

huskihl

Muh fingers look really big
GoldMember
Local time
5:42 AM
User ID
360
Joined
Dec 31, 2015
Messages
22,533
Reaction score
143,425
Location
East Jordan, MI
Country flag
PA Dan said:
Thanks my friend! I will try and correct as this saw will get a good bit of run time in the coming weeks!
Click to expand...
The tune actually sounds fine to me. Hair bit rich on the high side maybe. What I've noticed after they get shut off is that the needle leaks. I'm guessing maybe a longer spring, or some shims. The tank vents are supposed to build pressure , but the needle and seat are supposed to hold it also
 
PA Dan

PA Dan

Mastermind Approved!
Local time
5:42 AM
User ID
306
Joined
Dec 28, 2015
Messages
6,987
Reaction score
34,459
Location
White Oak PA
Country flag
huskihl said:
The tune actually sounds fine to me. Hair bit rich on the high side maybe. What I've noticed after they get shut off is that the needle leaks. I'm guessing maybe a longer spring, or some shims. The tank vents are supposed to build pressure , but the needle and seat are supposed to hold it also
Click to expand...
Thanks Kevin! What about it taking a while to come back down to idle?
 
huskihl

huskihl

Muh fingers look really big
GoldMember
Local time
5:42 AM
User ID
360
Joined
Dec 31, 2015
Messages
22,533
Reaction score
143,425
Location
East Jordan, MI
Country flag
PA Dan said:
Thanks Kevin! What about it taking a while to come back down to idle?
Click to expand...
Normal. If it returns to idle slowly after a long cut, it would be the high side that was too lean during the cut, causing the heat. Yours was 4 stroking as soon as the log got smaller, so it wasn't that.

I just saw above where you said you were running the walbro. I'd scratch my explanation of what I thought was happening with the needle. That I know of, that problem was only on the Zama
 
huskyboy

huskyboy

Sorta a husqvarna guy...
Local time
5:42 AM
User ID
1352
Joined
May 30, 2016
Messages
10,025
Reaction score
43,452
Location
Ct
Country flag
I’m about 1 3/4- 2 turns out on my ported 7900 I think depending on outside temperature. Too fat or too lean kills power. I tune any saw where they want to run, maybe a touch fat for long cuts with a big bar.
 
Last edited:
PA Dan

PA Dan

Mastermind Approved!
Local time
5:42 AM
User ID
306
Joined
Dec 28, 2015
Messages
6,987
Reaction score
34,459
Location
White Oak PA
Country flag
huskyboy said:
I’m about 1 3/4- 2 turns out on my ported 7900 I think depending on outside temperature. Too fat or too lean kills power. I tune any saw where they want to run, maybe a touch fat for long cuts with a big bar.
Click to expand...
I assume the Zama carb and is it stock or modded?
 
You must log in or register to reply here.
Top