http://www.lawnsite.com/showthread.php?threadid=47596
look for my post on this tread.
it is as follows.
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I have seen problems with the Honda 13hp, and 20hp engines. The 20hp are the same basic engine as the 24.
I currently run the Honda GXV620 on my Honda WB.
Last year I had severe engine problems where the top bearings went bad. The engine had less that 400 hours, and oil was changed regularly every 50 hours. My dealer claimed the engine was low on oil but it was in about the middle of dip stick hash marks (not low). It was unusual for my engine to be even that low. The dealer refused to disassemble the engine to positively diagnose the problem. Another thing to note - the air filter is of poor design and leaks air creating dirty oil accelerating the problem.
My dealer claimed that b/c i was low on oil they would not honor the warranty. I tried rather hard to contact Honda directly but they don't really have a support staff that i could find, and the regional engine distributor said he couldn't do anything without my dealer doing it. I spent $1,500 to put a new engine on my one year old mower.
The same dealer has denied other people for the same reason of low oil for other problems.
The most common other problem is that at about 350 hours I have seen probably 3 - maybe more - of the 13hp engine wobble loose at the bottom of the engine, and start leaking oil from the crank case.
A design flaw to note, Terrible air filter design, my redmax EB 7000 has a better air cleaner than my Honda engine - and yes this is the new model air cleaner.
or this thread.
http://www.lawnsite.com/showthread.php?threadid=21449
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New Honda 20HP
I just had to purchase a new honda 20HP (GXV 620) b/c my old one quit.
- on the old engine (GXV 620 w/ 300 hours) they dealer claims that i was running low oil and didnt take care of the filter. Well i would argue with both of those, but whatever. They said i should be running the engine with over full oil (thought that was bad) and that my filter was too old, pretty new, but cant argue with the fact dirt was getting through)
What i am wondering though, is should i purchase an aftermarket air filter and the amsoil oil filter system for the new engine. Both of these things would be cheaper than another new engine. but would they really benifit me at all. and if so where is a good place to get aftermarket air filters.
PS honda just redesigned the filter b/c it was a poor design and air was getting past filter element. (could this qualify me for warantee claim?)