Re: Compression check question

[legendre]

quote Dave Bernard:

My mistake but if the carb is on a 4cycle it must be open to get a true compression .Correct?

Correct.

In some cases, it’s absolutely mandatory. In all others, it’s just a Very Good Idea as it reduces the number of cycles the motor must make to max-out the reading.

Easier on your starting system, be it electro-mechanical or manual (your arm, leg, etc).