Merc 200 problem?

[cman]

My guess would be the air temp sensor is whats bad. I'm not sure how to test it though
There are no fish in this pond

[stoner]

Click the Merc forum link on BassBoatCentral, those guys are pretty good. By the way how old is you're 200?
Stoner:)

[cman]

Its not mine. I'm just working on it. Its a 99 model though. I've posted it on bbc but no replies yet thanks.
There are no fish in this pond

[CTFSHWHISKER]

Most sensors are tested using an ohms meter,you will need to find the base ohms reading then you will need to apply a temp change and note the ohms readings to see if it in spec or not,according to the merc manual,i have one but i am getting ready to put a water pump on my truck i will check the procedure and post it to you later this evening.

[CTFSHWHISKER]

you may get a reply in a month or two,i have asked things before then get a reply months later.