2 weeks ago
wondering if someout there can advise on the following. I'm located down here in New Zealand and have a G2 300 on my boat. Since new between the rev range of 1800 to 2100 it runs rough as guts, miss firing etc. Had the local Evinrude guys come out for a run and then they downloaded all the info and sent it back to to Evinrude in the States. They eventually came back and said put a new computer on it. That has been done and frankly it's not a whole lot better.
Now what it does at that 1800 / 1850 rpm is run like crap for 4 or 5 seconds and then jumps straight to 2300 rpm and runs very smooth.
I've been told it's something to do with the change over point in the electronic ignition. I'm just wondering if anyone else out has this problem, or is it normal??
2 weeks ago - last edited 2 weeks ago
Running rough, revs fluttering, jumping between 500 revs different, vibration... I have had this very same fault twice (three times as its doing it again) its been an injector failing, and each time it has not come up on fault codes. The engineer has had to go into the computer and shut down each cylinder in turn. When he shuts down one and it doesnt cause a splutter thats the injector he changes...
2 weeks ago
The EMM will only store and signal a bad injector code if the problem is electrical, such as a short or an open circuit.
An internal mechanical failure or problem inside an injector is not monitored. Many times a mechanical injector failure is a broken spring or stuck check valve, often from water in the fuel or phase separation causing corrosion.
"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.
2 weeks ago
Thanks for the reply from you and Blue Water Bill, was starting to think I was imagining things. We obviously don't have a heck of alot of G2's let alone 300hp G2's running around NZ so owner info is abit hard to come by.
Appreciate your guys comments and will take it up with the agent and Evinrude NZ and see what they say.