I'm think of purchasing a used 2006 250hp Evinrude etec outboard; the only issue that I can see is that the port side cylinder head has a small hole beside the lower spark plug - toward the injector at the edge of the flat the plug gets torqued on.
I can't remove the head as the motor is located 500km away.
What could have caused this 1/4" dia hole to be burned through the head? Would incorrectly indexed plugs contribuite to it? Lean fuel mixture?
I can buy new or used heads readily. I pretty sure a good engine shop could weld the repair as well. Concern I have is when I get it home and say replacing the head the motor runs; I plan on bringing it to a good etec mechanic to give it a full engine check; would it be possible for them to diagnose the issue so that it may not happen again.
The motor came off a RCMP patrol boat and was part of a 2-engine set up; the logged hours are 700 and the motor has been maintained to schedule.......apparently.
Anybody seen this before?
I'm a long time owner of Johnson outboards, ski doo snowmobiles and currently run a 2017 Blizzard 600 HO Etec and absolutely love it! In an earlier life I also worked for Bombardier in their aerospace division - I know quality!
Perhaps some in focus well-lit photos may shed some light on your engine problem.
"There is never just one thing wrong with a boat";
-- Travis McGee, main character in a book series by John D. McDonald
The factory recommends that a properly trained technician service your Johnson or Evinrude outboard motor. Should you elect to perform repairs yourself, use caution, common sense, and observe safety procedures in the vicinity of flammable liquids, around moving parts, near high-temperature components, and working with electrical or ignition systems.
The information offered here is only general in nature and should not be construed as complete factory approved procedures, techniques, or specifications. Always use the proper service manual for your motor, up-to-date service literature, the correct tools, and have an understanding of how to proceed with troubleshooting and repair methods. If you are unsure or uncomfortable with a procedure, a situation, or a technique, enlist the services of a factory trained technician.