Kohler ECV 730 - bogs under load

mczar07

Forum Newbie
Joined
Oct 9, 2021
Threads
1
Messages
6
I checked the vent hose and it appeared damp but no fuel running out. I ran the engine with the vent hose removed and it acted exactly the same. Could this indicate there is a vacuum leak somewhere in the vent line to throttle body? I did replace this hose due to it breaking upon disassembly. Inspecting now
Ok the hose is before the butterfly valve so it doesn't see vacuum really. I did find a chewed up oring on the map sensor. Attempted repair with slightly bigger oring and now I have a map sensor on order 🤦‍♂️
 

hlw49

Well-Known Member
Joined
Jul 11, 2021
Threads
6
Messages
447
This is there trouble shooting guide out of the service manual for this engine. Engine Loses Power ● Dirty air cleaner element. ● Engine overheated. ● Excessive engine load. ● Restricted exhaust. ● Faulty spark plug(s). ● High crankcase oil level. ● Incorrect governor setting (on engines equipped with electronic throttle body governor is digitally controlled and not adjustable). ● Low battery. ● Low compression. ● Low crankcase oil level. ● Quality of fuel (dirt, water, stale, mixture).
 

mczar07

Forum Newbie
Joined
Oct 9, 2021
Threads
1
Messages
6
This is there trouble shooting guide out of the service manual for this engine. Engine Loses Power ● Dirty air cleaner element. ● Engine overheated. ● Excessive engine load. ● Restricted exhaust. ● Faulty spark plug(s). ● High crankcase oil level. ● Incorrect governor setting (on engines equipped with electronic throttle body governor is digitally controlled and not adjustable). ● Low battery. ● Low compression. ● Low crankcase oil level. ● Quality of fuel (dirt, water, stale, mixture).
Thanks for the info. Iv'e been going through it as well and have done the following:

- installed air filter, changed oil and filter to proper level, checked compression, new spark plugs, new coils, reset the governor adjustment, charged and load tested battery, changed fuel, fuel filter, fuel pump, injectors, ECU reset, TPS relearn, new O2 sensor. MAP sensor is on the way since I damaged it when reinstalling it. There was a smashed O-ring on it which could have been causing the air leak, I just figured that it would have more of an issue at idle when vacuum is at it greatest. At idle, it runs perfect only has an issue when you load it up at high RPM.
 

hlw49

Well-Known Member
Joined
Jul 11, 2021
Threads
6
Messages
447
When you are saying CEL I assume you are saying check engine light. Does this mower have a MIL light malfunction indicator light that will blink codes or are they calling it a check engine light. Anyway will it blink codes?
 
Top