On john deere 345 18 hp kawasaki liquid cooled engine .temp light starts flashing on after ten min. run time. doesn't seem to be hot and water in rad. is not boiling over. replaced radiator cap, thermostat, and temp sensor what next

possible so have the coil checked
could be from dirt and grass blocking the cooling fins of that cylinder causing the problem with mixture
if you spent that much with a dealer and the problem was not fixed maybe you should complain about the cost and the failure to fix the fault

you need valve job done and new valves put in and i said new valves do not use old valves again 150.00 per cylinder

blow out radiator with hose from engine side,thru the fins,not too close,when engine cold drain radiator see what comes out.drain block as well.check for dirt or blockage in front of radiator.refill radiator with 50% antifreeze/rust inhibitor.If heater fitted,open heater to hot.Check water level after engine cools down.Check fan belts are tight.Renew thermostat

need new coil pack or have short in harness grounding engine from running. check fuel line to carburator. 1. take float bowel off bottom of carb. do not touch float or pin holding float. crank engine over until fuel comes out of carb. If fuel comes out, you don't have fuel problem. put float bowel back on carb. 2. check for spark. take spark plug out of mower. put wire back on plug and place the threads on head [or metal of engine to ground the plug]. crank engine over for a few seconds to see if plug gets spark . [always double check with another spark plug that is good]. [[ Remember!!! you have to have someone sitting on the lawnmower to start. unless you by-pass safety switch [only do this if you understand how the safety switch works. NOT EXPLAINED HERE!!!]] If spark is present, there is no grounding problem. when engine is cool. 3. CHECK COIL PACK. for continuity. When the coil pack gets hot it will stop any juice to the plug. A>Check temp sensor B> Check Safety switches grounding out. C> Check for cut wiring harnes. [loose wires rubbing against pulleys, wires cut by rodents]. Hope this helps.........................GAS

Sounds like you may have a problem with Choke adjustment, or perhaps a broken choke cable. Do you have a workshop manual?

you didn't say if it was hot on the temp gauge? no matter, it sounds like you have a stuck t-stat. when the engine is cold, a mechanical valve keeps the water from coming out of the engine block until warmed up, then opens and lts the cooler water in. this cools down the engine and the colder temp of the water shuts the valve again. this happens constantly while the engine runs, and if your t-stat is stuck, the engine heats up the water in the block, but with nowhere to go, simply overheats the motor. a good repair book will locate the thermostat housing for you and should you the repair procedure. (i assume you have checked the water in the rad. low water will give you same symptoms). good luck.

Your engine per John Deere is a Kawasaki FH500V

Here is the service manual (3.58 Mb pdf file) This should get you going again.

http://www.gardenresources.co.uk/content/garden_machinery/manuals/husqwm227_hwen2002_0000000-01.pdf

You have dirt in the fuel tank and it sucks the dirt up on the filter that is attached to the pump. After the machine stalls, the dirt falls off and it will restart and run for a few min.