She cranks with verified fuel and spark, but no go?

[hookyplank]

Originally Posted by Fairtax4me

Should have 100+ psi IIRC, but it could be lower if the engine has the automatic compression release.

Is there a way to tell if my engine has the automatic pressure release?

[lockman1]

Without ACR - 156 psi
With ACR - 71 psi
But, will be less depending on age and wear of the engine.

There are 2 ways...

• If your cart is a "key start" cart from the factory, in most cases it will have an ACR.
• Newer Kawasaki engines for pedal start carts will have a yellow, "W/O ACR" sticker on top of the engine in plain view.

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[hookyplank]

I probably have ACR then... My cart is a 2008, keyed ignition, with Kawasaki. I haven't found the yellow sticker anywhere, but I guess it could have been removed at some point. It currently has 2004 hours on it.

I would figure that either way 35 PSI isn't enough?

[lockman1]

When testing the compression... did you hold the GO pedal to the floor while cranking it?
If not... you'll need to!

[hookyplank]

Originally Posted by lockman1

When testing the compression... did you hold the GO pedal to the floor while cranking it?
If not... you'll need to!

I think the pedal was to the floor, but I did have my 8 year old son pushing it while I was reading. I will try again this evening and make sure it is all the way down when testing.

[hookyplank]

I found the "w/o ACR" sticker Ran the compression test again and the range is between 25-35 PSI. Looks like I'm in trouble...

[hookyplank]

Originally Posted by hookyplank

I found the "w/o ACR" sticker Ran the compression test again and the range is between 25-35 PSI. Looks like I'm in trouble...

Any suggestions on where to go from here? Should I go to a small engine shop and have top end rebuilt or just swap out with new engine? I'm not sure of expected cost to rebuild, but I did see that Vegas Carts has their 460cc for $600 and also found an Ironton 420cc engine at Northern Tool for $250. I'm just looking for any input or experience that some of you can offer. Thanks.

[Spicyunicorn]

Slow down speed racer have you checked valve lash yet? Low compression can by cause by valve lash to tight not allowing valve to close all the way

[Vaughn]

Is the spark plug firing? https://www.youtube.com/watch?v=mUOmsGiirTU

[hookyplank]

Update: I pulled the valve cover and both valves are all the way out. I'm getting blow by. If I press the valves down by hand and try to turn it over it wants to start. I'm thinking I may have a bad cam or something along that line...