Re: overheat issues suzuki 200 hp 2 stroke
I am the owner of twin 200 four strokes. I got an overheat alarm on one engine (good to have two engines - I was out in the ocean seven miles from my inlet) I got to work trying to find the problem: 1st replaced the tstats, then check all the connections. (amazing: on the top of the intake manifold there is an opening, when I compared it to the other engine, that some hole had a factory plug in it - when I started the bad engine water splashed out of the hole, and thus the cause of the corrosion on the bad engine - how did that plug come out?) Anyhow, after new tstats and wiring checks, I still got the alarm. Next step take boat out of water and remove lower unit and check water pump and water pressure valve, both okay but I replaced the impeller because I had it open. Back in the water and still the alarm. Next I unplugged the three temp sensors (two exhaust manifolds and one on head), engine ran fine, plugged in head sensor, no problem, plugged in one manifold, no problem, plugged in second manifold and alarm sounded. I then switched the two manifold sensors and plugged in the one from the good manifold and no alarm, plugged in the sensor that I thought was bad and sure enough the alarm sounded - tomorrow I'll get a new sensor and hope that the problem is finally solved.