Chainsaw carb. adjustment.

Bury the Trash

Member
Mixed Farmer
Does anyone adjust /tune the carb of their new internet bought chainsaw (as opposed to local dealer bought from who probably made sure it was spot on before it went out ?? )
Got one here running a red hot exhaust,so ive stopped using forthwith.... methinks its running too lean ..:unsure: as everything thing else seems in order?

im quite happy to have a fiddle ,just wondered as a matter of interest what other people do .
 

milkloss

Member
Livestock Farmer
Location
East Sussex
Don’t know if it’s right but I’ve always adjusted the high jet till it’s screaming it’s nads off and turned it a little rich to gain some composure again.

seeing as we’re on the subject….. how are we adjusting carbs in e10 capable small engines? A little more rich I guess. Loads of stories regarding them blowing up yet both the larger manufacturers, stihl and husky, are saying there machines can take e10 since min 2000’s or something like that.
 
I think the main issue with E10 is leaving it in the machine when not using it causing gumming up the carb and eating rubber parts. There's a few fuel stabilizer additives available but haven't tried any yet. Still getting e5 from town yet
 

MontyK

Member
Talking to a guy who came to thin our trees out, he'd had no end of bother regarding E10, gumming of carbs and running hot using premium brand chain saws aswell. Having to run super unleaded, costing a fortune.
 
Talking to a guy who came to thin our trees out, he'd had no end of bother regarding E10, gumming of carbs and running hot using premium brand chain saws aswell. Having to run super unleaded, costing a fortune.
For someone using saws all day every day it might be expensive but most farms,a gallon of fuel will last ages and it's only going to be an extra 50p or so. Stihl and husqvarna sell premixed 50:1 that causes no issues and keeps for two years but it's £19 for 5 litres. Run the saw on standard fuel until it's empty and put an egg cup full of theirs in at the end of the day
 

john432

Member
Location
Carmarthenshire
I try an adjust the high carb screw using a rev meter,pickes up the signal from the spark plug cable, without taking the top cover off. Get the air filter cleaned, saw warmed up , then adjust the max revs to the manufacturers max, or slightly less, less chance of a siezure if their running on the rich side.
 
Talking to a guy who came to thin our trees out, he'd had no end of bother regarding E10, gumming of carbs and running hot using premium brand chain saws aswell. Having to run super unleaded, costing a fortune.
Ffs its 10p a litre more for super unleaded, hardly a fortune. Probably runs a cheap 2 stroke oil as well but wouldn't blame that.
 

Timbo

Member
Location
Gods County
Talking to a guy who came to thin our trees out, he'd had no end of bother regarding E10, gumming of carbs and running hot using premium brand chain saws aswell. Having to run super unleaded, costing a fortune.

SU is hardly a vast increase in cost? Alternative is Aspen and it almost doesn't go off or gummy.
 

bobk

Member
Location
stafford
Does anyone adjust /tune the carb of their new internet bought chainsaw (as opposed to local dealer bought from who probably made sure it was spot on before it went out ?? )
Got one here running a red hot exhaust,so ive stopped using forthwith.... methinks its running too lean ..:unsure: as everything thing else seems in order?

im quite happy to have a fiddle ,just wondered as a matter of interest what other people do .
Didn't hnow you could , all preset nowadays
 

Kiwi Pete

Member
Livestock Farmer
Does anyone adjust /tune the carb of their new internet bought chainsaw (as opposed to local dealer bought from who probably made sure it was spot on before it went out ?? )
Got one here running a red hot exhaust,so ive stopped using forthwith.... methinks its running too lean ..:unsure: as everything thing else seems in order?

im quite happy to have a fiddle ,just wondered as a matter of interest what other people do .
Are you using a "running in mix" still?
(More oil=less fuel per cc of air/fuel mix so that means lean running)

but yes I would adjust the carb screws
 

Bury the Trash

Member
Mixed Farmer
Are you using a "running in mix" still?
(More oil=less fuel per cc of air/fuel mix so that means lean running)

but yes I would adjust the carb screws
Good point Pete the answer is no just mixed at 50 to 1 up to now ( not used it much mind you) better if if went to 40 . 1 for a while ?

could be hes still a bit tight ,never noticed it before but was getting dark and my attention was drawn to a very :oops:red hot centre part of the exhaust , he runs fine tho otherwise and startsok.
 

Latest Poll on TFF

  • Yes

    Votes: 22 14.9%
  • No

    Votes: 126 85.1%

JCB launches Fastrac ‘iCon’

  • 158
  • 0
Written by Charlotte Cunningham from CPM Magazine

JCB has launched new Fastrac 4000 and 8000 Series tractors with an all-new electronics infrastructure which is claimed to deliver higher levels of performance. According to JCB, the new Fastrac iCon operator environment has three key features: iConfigure – creating a bespoke control experience for every operator iConnect – integrating advanced precision agriculture technology iControl – redefining operation through new driveline software The 175hp to 348hp (133kW to 260kW) Fastracs feature the new iCon armrest console and touch-screen display to provide flexibility in operator allocation and operator information, as well as a new transmission control strategy to enhance operator comfort and powertrain efficiency, says the manufacturer...
Top