Supposedly this motor is the same as some Suzuki models, so I'm simply reporting this thread here for the benefit of Suzuki owners who may be experiencing a similar problem:
I recently purchased a used pontoon that has a 2003 (manufactured in '02) Johnson 4-stroke 50HP motor.
Whenever I start the motor, I get a long (and very loud) beep from the console - maybe 30sec. The beep stops and the Check Engine light remains on. The motor seems to run fine. We have had the boat out a handful of times with no real issues. There seems to be some hesitation at full throttle, but I was told that could be due to a slightly bent prop blade - which there is.
I did notice that if I turn the key to On, but don't start the Motor, the Check Engine light seems to flash in a pattern of either 23 or 32.
Any ideas of what I should look for?
FYI - I have two other problems that seem unrelated, but maybe not - my Fuel Gauge doesn't work (I know there is gas), and the RPM Gauge doesn't work (it's pegged at like 1800 RPM).
Whenever I start the motor, I get a long (and very loud) beep from the console - maybe 30sec. The beep stops and the Check Engine light remains on. The motor seems to run fine. We have had the boat out a handful of times with no real issues. There seems to be some hesitation at full throttle, but I was told that could be due to a slightly bent prop blade - which there is.
I did notice that if I turn the key to On, but don't start the Motor, the Check Engine light seems to flash in a pattern of either 23 or 32.
Any ideas of what I should look for?
FYI - I have two other problems that seem unrelated, but maybe not - my Fuel Gauge doesn't work (I know there is gas), and the RPM Gauge doesn't work (it's pegged at like 1800 RPM).
ok - made some progress, but still need quite a bit of help.
Again - Johnson 4-stroke 50HP - J50PL4ST model
Code is 2-3. (Hard to tell because it blinks 3 first, but the order is as such:
3 - long_pause - 2 - short_pause - 3 - long_pause - 2 - short_pause - ...
So, per the book, and according to the local Johnson dealer, that is code 23.
Code 23 is the IAT (Intake Air Temp Sensor). I checked the resistance across the Sensor itself, and that seemed within normal range.
I asked the dealer about ordering a new IAT, and they were hesitant. They claimed that they have never replaced one before. So. they don't think that is the problem. They are very helpful, but not very close to where my boat is, so a service call would be expensive.
What should I do next?
The SELOC mentions replacing the IAT (if resistance out of range - which, best I can tell, it is not). Then, mentions a wiring break or ECM failure. I can't tell where the wiring from the IAT travels, but I'm planning on tracing that down next.
Any ideas would be most helpful...
P.S. - I did have a split intake air silencer, so I replaced that. I seemed to think it was odd the inside of the silencer was coated in oil/grease/grime...
Again - Johnson 4-stroke 50HP - J50PL4ST model
Code is 2-3. (Hard to tell because it blinks 3 first, but the order is as such:
3 - long_pause - 2 - short_pause - 3 - long_pause - 2 - short_pause - ...
So, per the book, and according to the local Johnson dealer, that is code 23.
Code 23 is the IAT (Intake Air Temp Sensor). I checked the resistance across the Sensor itself, and that seemed within normal range.
I asked the dealer about ordering a new IAT, and they were hesitant. They claimed that they have never replaced one before. So. they don't think that is the problem. They are very helpful, but not very close to where my boat is, so a service call would be expensive.
What should I do next?
The SELOC mentions replacing the IAT (if resistance out of range - which, best I can tell, it is not). Then, mentions a wiring break or ECM failure. I can't tell where the wiring from the IAT travels, but I'm planning on tracing that down next.
Any ideas would be most helpful...
P.S. - I did have a split intake air silencer, so I replaced that. I seemed to think it was odd the inside of the silencer was coated in oil/grease/grime...
