skinwalker
Seaman Apprentice
- Joined
- Apr 25, 2011
- Messages
- 44
i have a 1995 Baja Jetboat 90hp mercury motor.
the boat will startup fine, and then after about 3-5minutes will die in idle and we cannot restart it. The motor turns, fuel pumps, and we see spark on the plugs, but the engine will not fire. Also all the plugs are tyically wet at this time as well. From doing alot of reading i'm starting to think it is the stator that is bad. I've already read about the switchbox going bad. I have a multimeter and called CDI Electronics today and we run a ohm test on the red and blue wires. the blue came back at 3280 and black at 69/70.
the CDI tech told me the ohm test is totally unreliable and only a DVA test wouuld prove with 100% accuracy. He said if i were to guess and trouble shoot that it is likely the stator.
I also called mercury marine who thought the problem was the fuel pump.
I called the local boat mechanic who thought it was a cracked coil (due to the boat shutting off after warming up).
I should also mention the idle seems alittle rough and irratic.
we have new gas in, checked all carbs (look good), new plugs, new wires. We even had the boat running down the river or 10 minutes at full throttle(very slow felt like 1/2 power...but this is a new boat and no clue how fast it should go if running correctly).
Technically the red wire test on the stator failed so is it the stator? I really want to order parts asap and get the boat up and running. the local boat mechanic is expensive and said it will be 2 weeks before he can even LOOK at the boat. Any other tests i can run? Any questions i can answer? My brother , who is helping me to fix the problem, is a 10yr diesel mechanic (not marine), i am just a guy with little mechanical skill who wants to get this fixed
one last thing i should mention is that we did have a problem with the carb when i first bought the boat (as full of varnish and had a stuck float) we didnt know it at the time (before we rebuilt the carbs) and sprayed a bunch of ether into the carb...which actually started the boat and the idle became extremely high, the boat was started out of water, we pulled the key, pulled the kill switch, unplugged the spark plug wires, and the motor was still running! It ran at full throttle like this for a good 2-3 minutes before we had enough common sense to both pinch the fuel line and try to suffocate the air intake, which did stop the motor finally. My fear is that this excess heat caused some damage to something in the electrical system, but again i'm NOT a mechanic and the problem could be totally unrelated before i spend $200 on a stator. The motor appears to have decent compression and no other unusual mechanical problems appear apparent.
the boat will startup fine, and then after about 3-5minutes will die in idle and we cannot restart it. The motor turns, fuel pumps, and we see spark on the plugs, but the engine will not fire. Also all the plugs are tyically wet at this time as well. From doing alot of reading i'm starting to think it is the stator that is bad. I've already read about the switchbox going bad. I have a multimeter and called CDI Electronics today and we run a ohm test on the red and blue wires. the blue came back at 3280 and black at 69/70.
the CDI tech told me the ohm test is totally unreliable and only a DVA test wouuld prove with 100% accuracy. He said if i were to guess and trouble shoot that it is likely the stator.
I also called mercury marine who thought the problem was the fuel pump.
I called the local boat mechanic who thought it was a cracked coil (due to the boat shutting off after warming up).
I should also mention the idle seems alittle rough and irratic.
we have new gas in, checked all carbs (look good), new plugs, new wires. We even had the boat running down the river or 10 minutes at full throttle(very slow felt like 1/2 power...but this is a new boat and no clue how fast it should go if running correctly).
Technically the red wire test on the stator failed so is it the stator? I really want to order parts asap and get the boat up and running. the local boat mechanic is expensive and said it will be 2 weeks before he can even LOOK at the boat. Any other tests i can run? Any questions i can answer? My brother , who is helping me to fix the problem, is a 10yr diesel mechanic (not marine), i am just a guy with little mechanical skill who wants to get this fixed
one last thing i should mention is that we did have a problem with the carb when i first bought the boat (as full of varnish and had a stuck float) we didnt know it at the time (before we rebuilt the carbs) and sprayed a bunch of ether into the carb...which actually started the boat and the idle became extremely high, the boat was started out of water, we pulled the key, pulled the kill switch, unplugged the spark plug wires, and the motor was still running! It ran at full throttle like this for a good 2-3 minutes before we had enough common sense to both pinch the fuel line and try to suffocate the air intake, which did stop the motor finally. My fear is that this excess heat caused some damage to something in the electrical system, but again i'm NOT a mechanic and the problem could be totally unrelated before i spend $200 on a stator. The motor appears to have decent compression and no other unusual mechanical problems appear apparent.