Recent content by loweman

I'll admit I am not an engine expert, but this has me stumped so I figured I would throw it out here.. We just had the manifolds and risers etc replaced about a week ago on horizon 8.1 dts on 2010 sea ray...240 hrs ea. Earlier this year all new plugs and fuel filters as they were due...

There was a sea trial with the survey....(that unfortunately is a whole different issue....Survey was crap, gave us a very clean survey but we found a host of issues once underway).. the survey #'s are slightly lower than what 45 posted above....have not checked the fuel pressure to the best of...

yep , tried that as well :( swapped them out before the trip and again midway..but i will listen to any and all suggestions!!!

Thx 45, We "seem" to lack top end speed, the engines don't seem to like being much over 3000 rpm for very long...with extended (as opposed to a short burst)use we will see the rpm come back a couple 100 rpm every once in awhile for 30 sec/min or so then come back up to the previously set rpm...

For any of the 360-390 DB owners out there. If you know, would you mind sharing your prop specs. We have a 390 DB with Horizon 8.1s and due to our performance (or lack there of) trying to figure out what others are running...?? THX!!

Mayor, do you mind if I ask what props you have on your 360 ? We have a 390 and are not getting expected performance with the current props...thx ahead of time! loweman