oil in gas

[seafox21]

good afternoon to all
I have 06 df140 I have spent lot of hrs. and money on this motor. and now I have gas in my oil. I replaced fuel pump about 2 months ago and everything was fine until yesterday. took boat out and gas showed up again in oil. could it be bad pressure regulator.

[Budjodi]

Try a compression and leak down test, may have a carbon build up on valves that is letting fuel through to oil,

[seafox21]

the block and head are new only54 hrs on them also replaced rings and bearings and primary fuel pump.