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Gene Davis
03-11-2002 06:10:01
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Re: Homelite chain saw model 26 LCS- need info please in reply to Dave, 03-10-2002 10:45:22
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Worked for Homelite dealer when this saw was popular.Think it was green and red, it was replaced I believe by the 5-30? It was made in the early-mid '50s. If i remember right this saw had the Tilliston hp series carburetor with a copper line to the fuel pump from the crankcase to work the fuel pump. Also if I remember correctly this saw has an internal rotary valve with the governer built in it as a spring operated gate which opened and closed by centrifugal force to regulate the rpms. It was a tough sucker with a replacable chromed cylinder thar was seperate from the crankcase and was manually oiled on the chain with a thumb operated pump,had a transmission drive which turned the large 1/2 " pitch chain slowly, and had enough lugging power that you could almost put a saddle on it and ride like a bronc. Most problems were caused by dirt or trashy air getting into the rotary valve/governor, causing wear on it and it would lose crankcase vacum/pressure and therefore be very mean to crank, and would blow fuel back out the intake. The rotary valve/gov. arrangement on this saw served as the intake valve, so you will not see a reed valve, or the modern port timed piston like most modern 2-cycle engines. This saw was a real man-killer in the woods due to its weight and bulk, but it was technology of the day. We used to take the brass plate out of the rotary valve and if the crankcase was not scored or scratched,we would lap it on a pane of glass with fine valve grinding compound and some times could reuse it. The rotary valve engine can be speeded up by the configuratiuon of to valve port, it can be shaped like a keyslot to increase the intake opening timing just like a hot cam in a 4-cycle. One quirk of this style engine is that as the rotary valve turns faster it feeds the engine more and the more fuel the engine gets, the faster the rotary valve turns,this can go on till it slings apart, thus the spring loaded governor gate to limit the rpms. You probably have a stuck governor gate that is limiting the speed. also the point gap is critical on this beast, can't remember it after all these years, but it controls the ignition timing,like the rotary valve does the valve timing, when the points get too close it retards the timing and made it run lazy also when they they are too wide it will kick back and hurt fingers! Most loggers were proud to get rid of them! They were very expensive to keep up. One logger said he could keep up 3 women for what that saw cost him to run!! Gene Davis
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