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#4657303 - 02/05/18 06:34 PM weird maintenance items
NH73 Offline

Registered: 10/31/14
Posts: 649
Loc: Pa, USA
I am going through my Honda Mower OM(HRX217HXA). At 100 hours, it says, grease the pinion gears. How do you do that? At 150 hours, it says to Adjust the valve clearance and the idle speed. Also clean the fuel tank. What? Clean the fuel tank. At 250 hours, clean the combustion chamber. We don't even do that on our cars. Does anybody do these? I like to get my stuff to run as long as I can. On my Kawasaki at 300 hours, it says to clean combustion chamber, check and adjust valve clearance, and clean and lap valve seating surface. Now I am not close to 300 hours on the Kawasaki, and I don't think the Honda is due for its 250 hour service, but how do you do all that if necessary. Or is it? We don't even do these in our cars.

#4657312 - 02/05/18 06:39 PM Re: weird maintenance items [Re: NH73]
Chris142 Online   content

Registered: 06/05/03
Posts: 16349
Loc: Deplorable in apple valley, ca
The valves need to be checked and adjusted. Dont worry about the other things.
02 Wrangler super-s 10w30
87 F250 proline 15w40
04 Tahoe super-s 10w30
Z400 Lucas 10w30
KLR250 Maxima 10w40
Can am maveric edge 5w40
57 case tractor 15w40

#4657421 - 02/05/18 08:49 PM Re: weird maintenance items [Re: NH73]
WhyMe Offline

Registered: 12/18/12
Posts: 457
Loc: Washington for now
i adjusted the ohv on my B&S engine and it ran a lot better. they were tight

#4657465 - 02/05/18 09:46 PM Re: weird maintenance items [Re: WhyMe]
wallyuwl Offline

Registered: 06/02/09
Posts: 1728
Loc: Wisconsin
Originally Posted By: WhyMe
i adjusted the ohv on my B&S engine and it ran a lot better. they were tight
How do you do that?

#4657519 - 02/05/18 11:22 PM Re: weird maintenance items [Re: wallyuwl]
das_peikko Offline

Registered: 01/01/18
Posts: 372
Loc: San Antonio, TX
Originally Posted By: wallyuwl
How do you do that?

The service manual will tell you exactly how.

#4657525 - 02/05/18 11:33 PM Re: weird maintenance items [Re: wallyuwl]
WhyMe Offline

Registered: 12/18/12
Posts: 457
Loc: Washington for now
Originally Posted By: wallyuwl
Originally Posted By: WhyMe
i adjusted the ohv on my B&S engine and it ran a lot better. they were tight
How do you do that?

#4657714 - 02/06/18 08:31 AM Re: weird maintenance items [Re: NH73]
boraticus Offline

Registered: 04/19/09
Posts: 2853
Loc: Canada
Adjusting the valves is simple provided one has some basic knowledge and understanding of internal combustion engines.

Knowing what TDC (top dead center) means is of importance as well as knowing the difference between the exhaust and intake valves. Having an idea of where and what a cam shaft and rocker arms are comes in handy.

If people have no mechanical experience, they are better off leaving that work to people who know what they're doing. They could end up with an engine that runs poorly by simply throwing off the adjustment when trying to torque down the lock nuts.

#4658340 - 02/06/18 06:51 PM Re: weird maintenance items [Re: NH73]
cronk Offline

Registered: 01/06/09
Posts: 1244
Loc: Watertown, New York
Check the valve clearances when due for sure.

As far as cleaning the combustion chamber, I usually spray some Amsoil Power Foam into the carburetor of a running small engine gradually until it stalls, let it soak for an hour then start up and fog the yard for 15 minutes. This seems to get the combustion chamber plenty clean.
You can also use Chemtool or Seafoam for this.
Don't worry about lapping valves or any of that, I've seen plenty of Hondas and Kawasakis with over 2000 hours without ever having the head taken off.
1998 GMC C1500
2003 Chevy Cavalier
2011 Nissan Quest
1986 Pontiac Trans Am
1940 Ford 9N Tractor
Amsoil lubes and filters!