C175-8 Honda engine

[Maxwell-8 4,366]

I have this Honda G300 on my c-175-8

It smokes sometimes nothing, sometimes a lot. 

95psi of compression

Poped the head.

cilinder bore looks good, no edge, all smooth, crosshege honing marks still visible.

Could it be that just the rings are worn? 

If so, Would you just be okay, with sticking in new rings? or do you need a bigger cylinder and a honing. 

 

I think it's interesting, the used some studs around the exhaust valve.

 

Somehow it tends to smoke more, when warm

 

[Achto 29,016]

1 hour ago, Maxwell-8 said:

cilinder bore looks good, no edge, all smooth, crosshege honing marks still visible.

 

Your cylinder may have cross hatch but it looks awful glossy. At the very least I would run a ball hone through the cylinder to put new cross hatch in before putting new rings in.

 

Ball hones are fairly reasonable and they are something that you can use at home with a simple hand drill. Remove all of the carbon from the cylinder and clean it. Wipe a generous coat of oil on the cylinder, insert the ball hone, spin it with a drill and work it in and out without letting the hone leave the cylinder. Adjust your in & out speed until your swirl marks look like they are coming out at the factory recommended angle. Leave the drill spinning as you remove the hone from the cylinder on your last out stroke. Clean the cylinder and install your piston with the new rings on it. Should only take around 30 seconds or so to ball hone your cylinder.

 

Purchase a ball hone in a size close to your cylinder size. One example.

https://www.amazon.com/Brush-Research-Flex-Hone-Cylinder-Silicon/dp/B002OW6UT2

Edited March 10, 2022 by Achto

[Maxwell-8 4,366]

39 minutes ago, Achto said:

 

Your cylinder may have cross hatch but it looks awful glossy. At the very least I would run a ball hone through the cylinder to put new cross hatch in before putting new rings in.

 

Ball hones are fairly reasonable and they are something that you can use at home with a simple hand drill. Remove all of the carbon from the cylinder and clean it. Wipe a generous coat of oil on the cylinder, insert the ball hone, spin it with a drill and work it in and out without letting the hone leave the cylinder. Adjust your in & out speed until your swirl marks look like they are coming out at the factory recommended angle. Leave the drill spinning as you remove the hone from the cylinder on your last out stroke. Clean the cylinder and install your piston with the new rings on it. Should only take around 30 seconds or so to ball hone your cylinder.

 

Purchase a ball hone in a size close to your cylinder size. One example.

https://www.amazon.com/Brush-Research-Flex-Hone-Cylinder-Silicon/dp/B002OW6UT2

Thanks for the explanation, Somehow I like this litlle Honda, lot quiter then the Kohler's.

[OutdoorEnvy 1,750]

Could be rings or valves but if you’re going through that effort do a proper valve job too and set clearances to spec.  

[Achto 29,016]

@Maxwell-8 I found a video that demonstrates the process pretty good.

 

 

Edited March 11, 2022 by Achto