Dial Gauge
You can do a pre-length check by bringing the piston to the top with a straw through the spark plug hole. 1) This will tell you about how long of a probe you need while also allowing for the distance of throw on your specific gauge. |
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Do not tap too hard on the punch which could result in crank / rod bearing damage. Clean the bit and check the mark. 2) | ||
When done, clean the crankshaft with Q-tips. Spin it left and right and check for debris through the timing hole | |