1999 200 Opti / Ser. #0G886121
Took boat out this morning, and after starting up, noticed that the check engine light was illuminated. However, the warning horn was not beeping. I went ahead and used the boat (close to the ramp), and did not have any problems. It ran just as well as it always has, jumping up on plane quickly, etc... The only problem I've ever had with this motor is that every now and then I'll get a warning beep with the check engine light, but it's very random and always just seems to happen when I hit rough chop when running hard, or am moving the shifter quickly between forward reverse. I've always related this to the TPS, but with it hardly ever occurring, never replaced it. With the warning horn not beeping now though and reading my manual, it appears a check engine light w/ no horn could be related to any of these components - MAP sensor, coolant sensor???, air temp sensor, injector, coil, or low battery voltage. I checked the battery voltage, and it was at 13V, so ruling that out. Also was going to rule out it being related to a injector or coil since the motor didn't exhibit any power loss or idle issues. Just wanted to get a feel for what others may think, and how to go about troubleshooting the MAP, air temp, and what's referred to as the coolant sensor??? Thanks ya'll!
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