Kawasaki FH680V Overheating

[RevB]

An inexpensive IR thermal gun is worth its weight when diagnosing some problems. Objective measurement beats subjective measurements every time.

Well...that's just not true. As an aviator of injected engines, you may have the capability to run rich of peak EGT or lean of peak EGT......rich uses excess fuel to cool an engine, lean uses excess air to cool the engine. Air is free and does not contaminate crankcase oil nor leave excess carbon. Even a carbureted engine has the ability, tho much more limited, to do the same thing. Years ago someone attributed an engine failure to lean combustion and "burned valves"....the only way you get burned valves or seats is to hold the valve faces off the seat and let combustion gasses erode either one....most likely the valve because thermal mass is much less and the valve gets hotter than the seat which is very effective at shedding excess heat thru the head's mass.

Almost forgot....the old spark testers were just neon bulbs in a non conductive pen except for a cupped aluminum cap that fit over the plug wire. If the bulb lit up, spark. Also useful to check electric fences to see if they're on or not.

 

[outdoorpowermike]

Poor pto switch or connection at the pto switch will turn off engine, so will a poor contact at the 20 amp fuse that feeds the mower from the battery. Try checking these for possible porblems.

 

[outdoorpowermike]

Poor pto switch or connection at the pto switch will turn off engine, so will a poor contact at the 20 amp fuse that feeds the mower from the battery. Try checking these for possible problems.