Twin 1999 OX66's on Scarab 30. Neither engine will power up past about 1700rpm. Both engines have had a major tune and will spin up when they are not under load (idle or test prop). Had 2 sets of mechanics go through the engines and all of the usual stuff checks out (compression, fuel...
Have a pair of 1999 OX66 250hp on a scarab. Bought it last year with no history ran well all summer but by the end of the season it was running very rough. Into the shop this spring and had a full tuneup, replaced all the filters, O2 cleaned(was seriously carboned), t-stats etc. Only...
