OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Chainsaws and Concrete Cutters Petrol Chainsaws and Concrete Cutters help understanding chainsaw operation

Grumpy, The "Oleo Mac 251" uses a "Tillotson HS" carby, similar to the Walbro WA, no impulse line, here's some photo's of my "Blitz 501" (rebadged Oleo Mac)



Here's some photo's of a "oleo Mac 946" which has a Walbro carby that uses an impulse line. There is an air vent chamber on this model, the tank vent outlet still goes to the right hand rear of the crankcase,


There is no valve in the tank vent, the lines just have to be clear.