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MS290 MM
« on: December 21, 2011, 12:23:43 am »
I have a question for all the Steel runners.I have it in my mind to purchase a new MS 290. It will have an 18BC of 3/8 pitch.Now I have had good success doing MM on all my saws but the MS 290 has the self adjusting carburetor or intellicarb or something of that nature.This is one feature that I am not familiar with.Will the carb adjust to a richer setting once the MM is completed?Also will this saw pull a 3/8 chain?I am getting a bit older and this chain is easier to sharpen in the field. Thanks Ken
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Re: MS290 MM
« Reply #1 on: December 21, 2011, 06:36:30 am »
The MS290's I have worked on all had adjustable H L and I carbs with (that snorkel looking thing that somehow they adjust for you running a dirty air filter).

 I have seen 20% to high of 23% quicker 1 cut times just from a simple 30 min muffler mod on them. 
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Re: MS290 MM
« Reply #2 on: December 21, 2011, 08:23:25 am »
The snorkel device between the carb and the air filter is a compensator that automatically adjusts the fuel mixture for a dirty air filter.

It works by biasing the fuel regulator diaphragm in the carb for any changes in carb inlet air pressure.

It will not compensate for a MM.

You will have to richen the mixture yourself for the MM.
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Re: MS290 MM
« Reply #3 on: December 21, 2011, 09:22:58 am »
It will not compensate for a MM.

You will have to richen the mixture yourself for the MM.
 
OK But are their adjustments on the carb to make the adjustments?Both High and low?Ken
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Re: MS290 MM
« Reply #4 on: December 21, 2011, 10:20:54 am »
I don't have a 290. I just have a 025 and a 026. They were both changed to have adjustable carbs. The original carbs on these were not adjustable on the high speed.
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Re: MS290 MM
« Reply #5 on: December 21, 2011, 01:44:18 pm »
Quote from: Kenskip1 on December 21, 2011, 09:22:58 am

OK But are their adjustments on the carb to make the adjustments?Both High and low?Ken

Quote from: Chainsawrepair on December 21, 2011, 06:36:30 am
The MS290's I have worked on all had adjustable H L and I carbs

Like in 2nd post of thread, all the 290's I have seen are fully adjustable. H L and I
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Re: MS290 MM
« Reply #6 on: December 24, 2011, 05:38:54 am »
I've got an older 029 carb but it has a fixed main jet .
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