I have a 2015 Chaparral 270 Signature with the DPS-B outdrive. While on plane the drive will trim up but drops back down within a few seconds. I do not see any oil sheen suggesting a trim cylinder leaking externally. I have replaced the trim pump thinking the check valve that keeps fluid bleeding back in to reservoir had gone bad. I'm still having the same issue of drive not staying trimmed up while under load. Any suggestions on what to look at next or how to test trim cylinders for leaks? Thank you in advance!
