From the owner’s manual:
Check compression pressure
Remove each glow plug and check cylinders, one by one, using a compression pressure gauge. If the pressure differs by more than 3.0 kg/cm2(42.7 psi) between cylinders or if the cylinder pressure is less than 30 kg/cm2 (427.0 psi) at 200 RPM, correct it.
Was there a big difference between cylinders?
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Bryan Bywalec
S/V Pelican, Hull 209
Siren Engineering, LLC