Honda gxv160

[janaohio]

I got a post hole auger. i believe it has a Honda GXV 160 5HP. It ran when i put it away 6 years ago. I pulled it out today. Cleaned carb. Pull start was stuck. I gave it a few good tugs and it pulled. But didn't feel like it had compression. I put fuel in . It won't start no matter what. I pulled valve cover off and one of the push rods was bent. So i guess the gunk stuck up the valve and bent the rod. i tapped on the valve and it freed up. I replaced the pushrod and still no compression but the valves and pushrods are moving fine.

I pulled cylinder head off and there's carbon but valves look like they are closed. The cylinder looks excellent and piston moves up and down smoothly. head Gasket is graphite metal type but looks good.

Anyone know what's wrong with this engine??

So im thinking it one of these
Bad head gasket???
Decompressoon figamijig??
Bad Rings???

[bobodu]

Try adding a teaspoon of motor oil down the spark plug hole and see if you get some compression.That would point to a stuck ring.
For the head gasket, spray around it with some soapy water and put some compressed air down the plug hole at top dead center with the valves closed.
I doubt it is the compression release because you would have compression just a harder pull.
Get any carbon out from under the valves.

[janaohio]

i already removed cylinder head. Could the stuck valve have caused so much compression that it blew something out?? i put my hand over the piston and it sucked my hand in.

[bobodu]

No. Did you adjust the valves????

http://outdoorpowerinfo.com/engine_specs/honda_valve_gaps.asp

[janaohio]

No didn't adjust valves but I did remove pushrods so both valves were closed and it still had no compression. It's a gxv140 engine

[bgsengine]

Take the head, install the spark plug, turn it with gasket surface facing up and level, clamp in a vise, our some gas in the "dish" created and see where gas leaks out

[HondaG100]

Both valves closed will likely show no compression although I've never tried it. Does it have spark? Did your plug get wet? Will happen with no compression. Very likely your new push rod just needed a little adjustment. Good luck.

[bobodu]

Closed valves are nice but they HAVE TO OPEN too.

[janaohio]

I closed the valves to see if I would increase the resistance on the pull cord.. I cleaned the carb and made sure fuel passage from the float needle were clear. I checked the spark. It has good spark. I will try pouring some gas in the CH.

I have almost the same type of engine on my leaf vaccuum but the vacuum it's a 5.5 gxv160 and it is has a good tug with some bounce back resistance.

I just put gasoline into the valve chamber. No leaks the fuel evaporated after 5 minutes. I noticed the carb flange spacers are cracked but that shouldn't cause a compression issue.

I put my finger on the spark plug hole and just felt some weak compression .not enough to get the compression "whoosh" past my finger or even escape past my finger

[bgsengine]

I closed the valves to see if I would increase the resistance on the pull cord.. I cleaned the carb and made sure fuel passage from the float needle were clear. I checked the spark. It has good spark. I will try pouring some gas in the CH.

I have almost the same type of engine on my leaf vaccuum but the vacuum it's a 5.5 gxv160 and it is has a good tug with some bounce back resistance.

I just put gasoline into the valve chamber. No leaks the fuel evaporated after 5 minutes. I noticed the carb flange spacers are cracked but that shouldn't cause a compression issue.

I put my finger on the spark plug hole and just felt some weak compression .not enough to get the compression "whoosh" past my finger or even escape past my finger

Read what bobodu wrote - valves have to open to GET compression - that is, at least the INTAKE valve has to open on the intake stroke and close as it starts up on compression, otherwise you're just stretching and squeezing the same small volume of air that was in the cylinder to begin with.