HELP! ms 162 carb adjust

[Michael Rupley]

I have not found a Stihl without an adjustment on the carb until now. I want to make this thing run well for the owner but can not find an adjustment for the mixture. Anybody know? Mike

 

[Sloughfoot]

Idle is all you can adjust on most of those small homeowner saws.

 

[Michael Rupley]

I like that you are trying to be helpful. The fact is a saw or any other engine needs a certain ratio of air/fuel to run. Every carburetor is metered to give near this ratio. Somewhere in the carburetor is a jet (maybe fixed) that does this. I have been working on saws since 1986 and have fixed thousands. Sometimes I have had to buy special tools. Sometimes the adjustment screws were left hand thread. Some had a jet under a plug in the carburetor. So in recap any carb is adjustable, just how is sometimes problematic.

 

[EFSM]

I like that you are trying to be helpful. The fact is a saw or any other engine needs a certain ratio of air/fuel to run. Every carburetor is metered to give near this ratio. Somewhere in the carburetor is a jet (maybe fixed) that does this. I have been working on saws since 1986 and have fixed thousands. Sometimes I have had to buy special tools. Sometimes the adjustment screws were left hand thread. Some had a jet under a plug in the carburetor. So in recap any carb is adjustable, just how is sometimes problematic.

You will not be able to make it run richer without drilling a jet. Installing a high altitude high jet will make it run leaner, but I wouldn’t do that unless you are actually at a higher elevation.

 

[jacob j.]

Maybe @ray benson has a service manual?

 

[Sloughfoot]

Maybe the customer could move to an elevation where his $200 saw runs well.

 

[ray benson]

Maybe @ray benson has a service manual?

Sorry, nothing that new.

 

[Michael Rupley]

Maybe the customer could move to an elevation where his $200 saw runs well.

I am glad you don't work on my saws.

 

[singinwoodwackr]

I have not found a Stihl without an adjustment on the carb until now. I want to make this thing run well for the owner but can not find an adjustment for the mixture. Anybody know? Mike

If it runs the same type of carb as the 170/ 172, there IS no adjustment other than the idle screw which also acts as the Low needle. And yes, I have tried to drill out the plug on one to see if it there was a way…nope. Same deal with the older Shindaiwa 488 and some of their other small saws.
The 170 can be upgraded to a ms250 adjustable carb but I doubt it would work on the new 162.

 

[Wonkydonkey]

I doub this pic will help much, I screenshot it from Lsengineers, all you have to do is make a free account and you can see the ipl “s

 

[ray benson]

I have not found a Stihl without an adjustment on the carb until now. I want to make this thing run well for the owner but can not find an adjustment for the mixture. Anybody know? Mike

This morning, a generous member sent me a 162 service manual . Check your inbox.

 

[EFSM]

I doub this pic will help much, I screenshot it from Lsengineers, all you have to do is make a free account and you can see the ipl “s
View attachment 488795View attachment 488796

#3 on that diagram looks like the main jet, although there are no P/N’s for it.

 

[Michael Rupley]

Now we are getting somewhere. BTW I have adjusted the mixture on some carbs by slight tweaking of the metering diaphragm. Mike

 

[EFSM]

Now we are getting somewhere. BTW I have adjusted the mixture on some carbs by slight tweaking of the metering diaphragm. Mike

What kind of issues is it having?

 

[jmester]

#3 part number
1130 121 5601
Fixed jet 0.44

For these carbs

• 1148 120 0601
  Carburetor 1148/01
• 1148 120 0603
  Carburetor 1148/03

 

[jmester]

1148 120 0600
Carburetor 1148/00

Z000 070 Z008
Remote jet

 

[jmester]

1148 120 0670
Carburetor 1148/70

1123 121 5602
Fixed jet 0.46