RonR
Guru
2015 Kohler 15KW Gen Set. 30 hours on the clock.
The PO had this unit installed new, and for the first year it ran great, then he had it serviced by Kohler and it then started this problem 2-3 months later. He always thought it was the undersized sea strainer and feed line as it was 3/4. (has 1.5 sea cock)
It will run for about 1-1.5 hours and then the high temp alarm comes on, and it shuts down.
Since our ownership I have replaced the sea strainer to a 1.5, upsized the feed hose to 1.5. Replaced the impeller, and thermostat. Changed Oil/filter/air cleaner/Zink.
When I check the thermostat housing with a temp gun it reads 170, the heat exchanger reads 160, the exhaust mixer reads 145. The factory thermostat is a 190, and its the only one offered (took 2 months to get). The high temp reading on the panel says engine temps are 170. Good water flow out of the exhaust, and its not all that hot, hard to get an accurate temp.
While I was waiting for a new thermostat to show up I ran it without one at all. It never shut down, but it did start smoking (unburnt fuel) as I don't think it was getting hot enough for it work right. Once I put the new thermostat in it stopped smoking once it got up to 170, and then shut down to overheating.
I tried disconnecting the temp sending unit (factory one is 3 months out). But it reads a ground fault and will not start. I have pulled the temp sending unit out and blocked it with a plug. But it will only run in forced mode as it reads no temperature.
This is what I am left with.
1. The temp sending unit may be faulty?
2. The Kohler service guy may have done some kind of reset on the computer for the wrong model? And I need to call them out to reset it again as I do not have the fancy cord, or the program on a lap top to read it.
Thoughts?
The PO had this unit installed new, and for the first year it ran great, then he had it serviced by Kohler and it then started this problem 2-3 months later. He always thought it was the undersized sea strainer and feed line as it was 3/4. (has 1.5 sea cock)
It will run for about 1-1.5 hours and then the high temp alarm comes on, and it shuts down.
Since our ownership I have replaced the sea strainer to a 1.5, upsized the feed hose to 1.5. Replaced the impeller, and thermostat. Changed Oil/filter/air cleaner/Zink.
When I check the thermostat housing with a temp gun it reads 170, the heat exchanger reads 160, the exhaust mixer reads 145. The factory thermostat is a 190, and its the only one offered (took 2 months to get). The high temp reading on the panel says engine temps are 170. Good water flow out of the exhaust, and its not all that hot, hard to get an accurate temp.
While I was waiting for a new thermostat to show up I ran it without one at all. It never shut down, but it did start smoking (unburnt fuel) as I don't think it was getting hot enough for it work right. Once I put the new thermostat in it stopped smoking once it got up to 170, and then shut down to overheating.
I tried disconnecting the temp sending unit (factory one is 3 months out). But it reads a ground fault and will not start. I have pulled the temp sending unit out and blocked it with a plug. But it will only run in forced mode as it reads no temperature.
This is what I am left with.
1. The temp sending unit may be faulty?
2. The Kohler service guy may have done some kind of reset on the computer for the wrong model? And I need to call them out to reset it again as I do not have the fancy cord, or the program on a lap top to read it.
Thoughts?
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