Author Topic: sach dolmar 143 chain brake help  (Read 462 times)

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Offline Miller-Thinner2

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Re: sach dolmar 143 chain brake help
« Reply #10 on: December 17, 2013, 06:16:56 pm »
so I should leave it alone? lol

Offline Cut4fun

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Re: sach dolmar 143 chain brake help
« Reply #11 on: December 17, 2013, 07:28:22 pm »
Yes unless you want to remove it then it will rev limit your saw. If modding you want the passage blocked off.
REDNECK Saw Repair

Offline chainsman1

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Re: sach dolmar 143 chain brake help
« Reply #12 on: January 01, 2014, 07:40:48 pm »
It's worth the $$ they were asking.  Ask chainsman1. I think he may have built a 143 more some kind of racing.

Those 143 could be run a lot faster,but parts are very hard to find.the cylinder platings are not very durable.so every saw i found were scored.the one i own have been built a long time ago by somebody else.the fingers were too deep and the cylinder **** up in the bore. It still runs but i parked it.i dont want it to grenade

Offline Bitburger

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Re: sach dolmar 143 chain brake help
« Reply #13 on: January 11, 2014, 06:09:41 pm »
this mechanical rpm limit is for protecting the enginge when at full throttle without any load.
Maximum power while cutting should be at a much lower rpm, like 9000 rpm or so !

Just "fixing" that valve will not affect the power while cutting! Excpet you will do some porting job, that ends up at a higher rpm during normal opperation.

The valve also does not alow you anymore to do carb adjustment according to max rpm, just as every rpm-limited saw, you have to do the finetuning while cutting in wood.

As I wrote in your other thread, the 143 is the last saw you want to tune above factory specs! Not very durable even in its original setup!


 

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