What is the proper gap for the spark plug?
The gap is usually around .025.
But first to see the spark plug is firing by removing, grounding to the cylinder where you can the gap then pull the starter cord.
If there is spark jumping the gap then your more likely to have a compression problem. These engines needs at 100 psi to fire; otherwise, fuel is just drawn in but is never ignited by the plug.
In this case you would remove the muffler and check the cylinder, piston and ring condition . A bad scored cylinder or piston will cause lack of compression. A struck ring will also cause lack of compression. A struck ring can check for by using a small screwdriver gently probing the ring to see it moves freely. If the ring is struck then the cylinder will need to removed so ring and piston can cleaned. Note: these are easily broken so don't use to much force when trying to free them.
Nov 05, 2014 |
Bolens 31cc 2-Cycle Gas Cultivator BL410