blacktrain
New member
Saw won't fire. New plug, has very hot blue spark, 118lb. of compression, put fuel directly into the cylinder and still won't fire. Any ideas? Thanks!
Stihl 400 demo saw
- Thread starter blacktrain
- Start date
As in a TS 400?
If the compression reading is true- it is probably too low- if you are using an automotive tester designed for V8's- it may not be.
100-120 psi and you will be lucky to get a 2 stroke small single cylinder to fire up. Muffler off and see what the piston looks like through the exhaust port- take photos.
Another likely is failed main oil seals on the crank. Massive air leak will stop a saw from starting when all else looks good.
If the compression reading is true- it is probably too low- if you are using an automotive tester designed for V8's- it may not be.
100-120 psi and you will be lucky to get a 2 stroke small single cylinder to fire up. Muffler off and see what the piston looks like through the exhaust port- take photos.
Another likely is failed main oil seals on the crank. Massive air leak will stop a saw from starting when all else looks good.