1998 Optimax 200HP history of temp light warning

Gale Young

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Joined
Jul 15, 2011
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I have 250 hours on this engine. After 100 hours or so, it started with the temp warning light issue. It would run fine, then all of a sudden the temp warning beeps start sounding - no decrease in rpms, just the warning beeps. You turn it off, restart, and it runs fine.....until sometime later when it occurs again. I have had low water pick ups installed, replaced the temp sensors, an internal filter (corroded) and had it diagnosed by 3 different repair facilities who claim they can't find any problem. Last week, I took it out, and couldn't get it to accelerate past idle....sputters and dies. The same temp warning light came on. Any ideas? Would greatly appreciate any input.
 
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