Modifying a ms201t

[Johny Walker]

Only problem so far is one bent av spring

 

its the start !!!

[Stubby]

Only problem so far is one bent av spring

 

I am on my third AV spring . I am going to put a short webbing strap between the 2 halves of the saw to limit the movement . In extreme cases , when the spring is bent to almost a right angle , it can pull the impulse line stretching , tearing or removing it .

[peatff]

Joe Newton videos It sounds strong enough Joe.

[Joe Newton]

Joe Newton videos It sounds strong enough Joe.

 

 

Thanks for taking the time to post the link, I couldn't be bothered on a Saturday evening.

 

For me it perked it up enough not to warrant faffing about with the limiter or flywheel key. The effects I found were snappier pick up, and the engine breathed easier so there was far less bogging down in full bar length.

These new engines are quite heavily retarded, which increases longevity, since the saw is never able to work as hard as it potentially can. The muff mod just helps the saw realise a bit more of its potential.

If you time the two vids the difference is fairly significant, considering its 2 mins with a drill.

 

My kind of engineering!

 

 

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[Sciadopitys]

Well here it is!

 

Definitely more power and throttle response!

[Joe Newton]

Good man. No need to go messing about with the flywheel key or carb limiter!

 

Just check the plug colour after the first few uses. Mine didn't need adjusting but it's good to be safe!

 

 

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[Burgess]

Why would the plug be affected by a hole in the exhaust? The engine is essentially done with the gases when they reach the exhaust.

[Joe Newton]

Mine wasn't. But are you willing to bet a lean seize on your logic?

 

 

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[Daniël Bos]

Why would the plug be affected by a hole in the exhaust? The engine is essentially done with the gases when they reach the exhaust.

 

Exhaust gasses exit quicker, thus there is scope for an increased flow of fuel/air mix into the engine as well (which is what increases the power).

Different amount of air/fuel through the engine has the potential to alter the ratio of fuel to air.

Checking the plug colour can give a good indication of the fuel/air ratio that's being burned.

[Sciadopitys]

My H screw is turned as far anti clockwise as it can go! (With the limiter still on). Saw runs well and plug looks normal brown colour!

 

The saw is definitely running cooler, it used to get red hot after heavy use, not anymore! I am presuming this is a good thing!?