Throttles down

D

Davenj4f

Active Member
Ferris ISX2200, 5901995, Kawasaki FT730V - CS41 -R, EFI, E/No FT7330VA15799
Engine has about 2000 hours on it., semi-commercial use.
A couple of years ago it started throttling down to the lowest RPM, stayed there for awhile until it apparently cooled. I had to switch it off and restart to continue. To shorten the story, dealer was no help. I discovered the fins were half blocked (my bad). I cleaned the fins, and replaced the temp sensor. All seemed well for awhile. It has started doing it again. Replaced the temp sensor, no help. Fins are clear.
As an aside, it uses a lot of oil. If I cut all day, it would use almost a quart of oil. Don't know if that is relevant. No leaks, no smoke. Don't know where the oil is going. Have always changed the oil and filter religiously.
Otherwise, it seems to run fine.
I'm considering rebuilding the engine, but don't know if that would help the throttling down issue.
 
Might need to load it, go to a Kawasaki Small engine shop and get them to read to diagnostic codes. But call first to verify they have the reader.

It too expensive for a small shop like mine to purchase it as it is nearly $500.
 
StarTech said:
Might need to load it, go to a Kawasaki Small engine shop and get them to read to diagnostic codes. But call first to verify they have the reader.

It too expensive for a small shop like mine to purchase it as it is nearly $500.
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Have already considered that as an option. Last time it was in the shop for this issue, they said it didn't show any negative codes. But I have reason to believe they didn't hook it up. Will check into this anyway. But I was hoping someone may have a clue as to where the problem may lie thru experience.
Thanks for the reply
 
If it's losing that much oil, it's going somewhere. Either it's going out of the tailpipe or it's leaking. It's probably both with that many hours. If there's a bunch of gunk around the PTO clutch, it's a crank seal.
 
MParr said:
If it's losing that much oil, it's going somewhere. Either it's going out of the tailpipe or it's leaking. It's probably both with that many hours. If there's a bunch of gunk around the PTO clutch, it's a crank seal.
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I agree, but I cannot find any loose oil, gunk or anything around the engine. It must be going out the tailpipe, but it's not visible. That's why am considering rebuilding the engine, but would like to resolve the other issue first so I know what else to fix. Maybe a ring, piston and connecting rod fix will fix everything.
 
Is there any oil present in the air cleaner side of the carburetor? If so then it is probably a bad head gasket though cylinder/rings can also do that.

Modern oils don't smoke in small amounts. I had one Briggs that was going a quart while mowing an acre once and it didn't even smoke.
 
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