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I am looking to see why my 2005 Grizzly 660 won't crank. I have set the valves but suspect a loose timing chain.
When working to remove the valve cover I found a "cap tensioner case" - parts #25 - #299 on Babbitts site.
The cover seems to bridge the valve cover and the cylinder head. What the hell is it and what surprises will I find if I remove it?
Uncharted territory for me.
I bought a "project" Grizzly 660, I think it has been a few people's project. The PO had it for a while and did not have time to work on it. He said the battery was good, but I don't know how he knew because the display was blank, no lights and won't crank or run.
I found a nest under the front cover, by the CVT inlet, a chewed thru wire and a few more without insulation. Rewired those from the connector (black 3 wire to the display) and replaced the fuse as suggested by a search from this site. That got the display working and power to other circuits.
I replaced the aftermarket start switch with a used OEM switch from eBay. Then it would crank a little, and started once for a few seconds.
I'm a small engine mechanic - mowers, snow blowers, etc. In my small engine work I have had a number of rider mowers that would crank about a half turn and then stop. The owners have suspected a bad battery and changed it with no improvement. Setting the valves to spec usually fixed this.
I set the valves on the Grizzly without solving the crank problem. I wonder if the timing chain could be off - slipped a tooth.
I don't know any way to check for this without pulling the head and looking at the timing marks on the cam gear.
Is there another way to check for proper timing?
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