I recently discovered that several of my Honda OHC engines are in fact equipped with timing belts, one is a on a tiller and it was a rental unit before I bought it and was rode hard and put away wet. I probably put 20 hrs a year on that tiller and would say it has very high hours. It has a timing belt, as well as my brand new 4 cycle mantis tiller (why I waited so long to buy a mantis is beyond me), I also have a 2003 Honda harmony push mower and a 2003 pressure washer with honda motors that have timing belts. I don’t know how this never came to my attention sooner, somehow I have missed this fact over the years until I read the manual for my new mantis.
From what I can tell the belts are in a sort of oil bath but I might be wrong about this, Now I know that a tiller or pressure washer or generator will never have the hours on it a car does, but why have we not tried the same technology in a car or truck? I figure its just not feasible, as most small engines run at a fixed rpm and do not run in below zero weather, however I find this technology interesting and think its worth discussion.
A car that has 250k miles, with a 60mph average speed over those miles will have over 4100 hours on it, now I figure that average speed is much lower but I am sure there are generators with over 10k hours on them with the original timing belt, any input?