Nor should it - it should hold the peak reading. It should show around 140 to 180 PSI, after a good strong pull on the starter.
Champion mower stopped & now unable to start
- Thread starter ipbr21054
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But when you pull the starter cord the compression should go into the tester & the tester hold it there,each pull of the cord should bump the needle up a little.
Once finished you press the release button on the tester to let out that whosh of ait etc BUT THERE WAS NONE
The needle didnt even move & if it did its minimal.
Once finished you press the release button on the tester to let out that whosh of ait etc BUT THERE WAS NONE
The needle didnt even move & if it did its minimal.
It might be the inlet valve sticking a little, then suddenly freeing, closing under valve spring pressure.
Correct, so maybe due to that sticking/clicking inlet valve. You need to investigate why that is.
Ok think we are getting crossed wires.
I mentioned about no compression THEN i took the head off.
If compression was there then the gauge would show it.
With no compression then thats why i removed the head.
Do you know what the clicking might be ?
Raing hard here so when it stops i will see about taking off the valve cover & see what happens
I mentioned about no compression THEN i took the head off.
If compression was there then the gauge would show it.
With no compression then thats why i removed the head.
Do you know what the clicking might be ?
Raing hard here so when it stops i will see about taking off the valve cover & see what happens
Post #19 above..
On side valve engines, the exhaust valve seat comes loose, lifts and jams the valve open.....
Very hard to spot until it happens!
John
Very hard to spot until it happens!
John
So in my video the small valve is the one that clicks on one of its cycles.
First cycle no noise, second cycle as valve is going down to its seat there is a click.
Same over & over.
So I await what you say about which valve it is.
First cycle no noise, second cycle as valve is going down to its seat there is a click.
Same over & over.
So I await what you say about which valve it is.
The exhaust valve runs hotter, which is why it comes loose.
No big deal, it can be peined back into place.
John
No big deal, it can be peined back into place.
John
Hi,
Today I removed the valves & took a look.
Valve seats are intact & not come loose.
Valves are not burnt out either.
Cleaned valves & put them back in the engine.
So am I correct in saying that if the rings broke it would either smoke bad & or leave score marks in the bore.
I ask as no smoking & bore is nice condition with no scores.
So this leave me with head gasket of which I’ve ordered one.
What do you think about this now.
Ps
One thing I noticed was the larger valve had its spring & retaining collar & say another circular part with a hole in the centre.
The small valve only had its spring & retaining collar.
Today I removed the valves & took a look.
Valve seats are intact & not come loose.
Valves are not burnt out either.
Cleaned valves & put them back in the engine.
So am I correct in saying that if the rings broke it would either smoke bad & or leave score marks in the bore.
I ask as no smoking & bore is nice condition with no scores.
So this leave me with head gasket of which I’ve ordered one.
What do you think about this now.
Ps
One thing I noticed was the larger valve had its spring & retaining collar & say another circular part with a hole in the centre.
The small valve only had its spring & retaining collar.
I’m not saying that the valve seat was definitely loose, but it’s not uncommon when the engine gets hot.
When it cools, it may grip again so problems may not be obvious.
Broken piston rings can’t be seen without removing the piston, but a very worn bore will cause the engine to smoke.
At this point, see that there is a small clearance between the valve stems and their lifters - simple as the springs are out.
Give us a picture of the valve retainers please!
I don’t bother measuring the compression on these engines, if your thumb blows off the plug hole when you are cranking it will probably be ok.
John
When it cools, it may grip again so problems may not be obvious.
Broken piston rings can’t be seen without removing the piston, but a very worn bore will cause the engine to smoke.
At this point, see that there is a small clearance between the valve stems and their lifters - simple as the springs are out.
Give us a picture of the valve retainers please!
I don’t bother measuring the compression on these engines, if your thumb blows off the plug hole when you are cranking it will probably be ok.
John
I’ve just been able to access your video on post #12.
Did you notice at the click, the exhaust valve was hardly opening?
John
Did you notice at the click, the exhaust valve was hardly opening?
John
I was just reporting back about valve seats & other things etc.
I’ve now put it back together & awaiting a head gasket.
I won’t be taking the piston out but I think rings isn’t the problem.
There was no smoking either.
On assembly & turning the flywheel around the clicking on the small valve is still there. I think it might be some kind of decompression thing where it makes starting easier ???
I’ve now put it back together & awaiting a head gasket.
I won’t be taking the piston out but I think rings isn’t the problem.
There was no smoking either.
On assembly & turning the flywheel around the clicking on the small valve is still there. I think it might be some kind of decompression thing where it makes starting easier ???