1998 Johnson 200 check engine light

Striper80 · #1 10-25-2015, 11:13 AM

I've got a 98 200 Ocean pro, carbed, with the system check gauges. Last week I changed the plugs, racor filter, and repaired my tilt trim. Yesterday I started it up and the check engine light went on and the alarm sounded. I looked online and read that it meant a fuel restriction so I said screw it and headed out to see how she ran. Well the boat ran better than all summer, I actually picked up about 3 knots on the GPS at wot. If there wasn't a single stumble I'm just wondering what to even look for? I replaced all the fuel lines to the engine from the tank last summer and never had an issue. I used brp hose and their primer ball, not the cheap stuff.
Another issue I have is with the no oil sensor. The sensor works fine but the jelly that hold the two wires into the sensor fell out and allowed one wire to come off causing the sensor to go off. I popped the wire back on and it was all good for the ride in. I've tried looking online for the sensor but it seems that this is part of the OMS. That true or do I need to dig a little deeper?

inaforty · #2 10-25-2015, 01:12 PM

Striper,
I'm not a expert by any means but could that extra 3 knots be a lean condition?
Alarm with a possible fuel restriction?
That could destroy a piston if not corrected.

Ferm or Spare will have a much better idea.
I'm just guessing.

Striper80 · #3 10-25-2015, 01:44 PM

Quote:

Originally Posted by inaforty

Striper,
I'm not a expert by any means but could that extra 3 knots be lean condition?
Alarm with a possible fuel restriction?
That could destroy a piston if not corrected.

Ferm or Spare will have a much better idea.
I'm just guessing.

I thought it was from changing the plugs, but that's certainly a possibility.

THEFERMANATOR · #4 10-25-2015, 04:03 PM

If the alarm sounds as soon as you turn the key on, then chances are the restriction sensor is bad. Normally it only trips when under load as thats the only time your pulling much fuel to the engine. As to the wire, is it the one for the tank? Got picture of it by chance so we can see which one your talking about?

Striper80 · #5 10-25-2015, 05:21 PM

Yeah the alarm sounds right after the system check is finished. It sounds for like 10 seconds then stops, the light stays on. It doesn't sound again until I shut the engine off.
I looked on my 96 130 to see if it had the sensor but it doesn't. My boat's about an hour away and I won't be able to get to it until Saturday.

THEFERMANATOR · #6 10-25-2015, 07:38 PM

Try unplugging it and see if the alarm continues to go off.

Striper80 · #7 10-25-2015, 08:09 PM

Which plug is for the sensor? Maybe I left it disconnected when I repaired the tilt trim inadvertently. The first time I started it was at the ramp on Sunday since repairing it.

THEFERMANATOR · #8 10-25-2015, 09:46 PM

Find the fuel restriction sensor(should be a small round canister with 1 fuel line hooked to it mounted to the VRO bracket), and follow the wires from it to the harness. With it unpluged it should not work as it is a switch that closes under vacuum.

Striper80 · #9 10-26-2015, 11:44 AM

Thanks I'll give that a shot.

Striper80 · #10 11-03-2015, 06:25 AM

So I was able to get down to the boat and check out a few things, but I wasn't able to run it due to it being too late at night. I found a t fitting leaking right before what I'm guessing is the sensor for the check engine light. The sensor for the check engine light is the one that the wires fell off, but reattaching them didn't cause the light to go out.
I'm going try and find some type of non conductive epoxy or rubber to refil the cavity of the sensor and fix the leak and do some further testing this weekend. I still need to see why I had a "no oil alarm" momentarily. The tank was low but I never got a low oil alarm. One thing at a time and I'll run it premixed for a little while on a separate tank.
The sensor is the white thing below the vro.