Thread: 50 hp merc help
View Single Post
  #20  
Old 06-18-2012, 09:34 PM
FiveO's Avatar
FiveO FiveO is offline
 
Join Date: May 2007
Posts: 216
Default

Your forth pic shows a breather. Put your fingur on it while running and I gaurentee it will stall the engine. Dont be scared to trim the boat. I have 70 EFI 4STROKE and i only get WOT with it trimmed to the point its racking water but it also nets another 4 mph. EFI engines are tuned by the ECU for the specific conditions, if you had old fuel it would run like crap, spit, barf and smell foul. My 16' Crestliner with 3 guys only gets 34 MPH at WOT A 90 HP might get you another 10-12 MPH. If you choose to re-prop you will sacrifice either hole shot or top end.
Reply With Quote