Quote Originally Posted by Indiana Rob View Post
I have been having a similar problem this year.
Took boat out this PM with great water conditions.
Ran for about 5-10 minutes at roughly 20 mph then lost power I stopped and idled For 1 minute then boat ran fine for next 5 minutes back to shore.
Things I noticed:
Tach no longer working

Oil gauge high?
Idle 20
Roughly 10mph. 40
Roughly 15mph. 60
Roughly 25mph. 70
Gauge goes up to 80

So far this summer we have
-Replaced plugs
-Fuel filter
-Fuel pump
-Cleaned out the water in take filter
-Repositioned the water in take filter as it was upside down
-had to replace the water/exhaust hose
What year/make boat? Carb, TBI or MPI engine? Indmar or PCM?
First guess would be fuel related. If its not sputtering or backfiring I wouldn't think ignition. Not sure what's going on with your oil pressure. You could buy an inexpensive pressure gauge and screw it right in where the sending unit goes to see if it duplicates what your dash gauge shows.