I bought my JD TRS27 snowblower and have already had to plate the motor mounting area because of some cracks. And I was getting ready to get a new carb for it, but I wanted to ask you guys first how much compression my motor should have. I tinker with some 2 stroke boat motors and they typically have around 125psi. but I tested this motor and it has only about 50psi. Is that normal for this motor?