07 Rhino 660 No start - Yamaha Rhino Forum - Rhino Forums.net
Engine For discussion of engine performance, and maintenance

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  • 1 Post By Cjensan
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post #1 of 6 (permalink) Old 06-15-2019, 08:43 PM Thread Starter
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07 Rhino 660 No start

Hello all,

I am a new rhino owner, picked it up non running. So a few unknowns for sure.

The rhino does have a big bore 700 kit (am told), aftermarket muffler, and aftermarket CDI unit.

I started with the basics. I do have great spark, and have got fuel to the carb. If I cover the carb opening with my hand it does get wet.

If I spray fluid into the carb I do not get even a flicker of the engine attempting to start.

I checked timing marks and with the I in the window I have the two dots showing on the cam gear level with the head. Everything shows to be correct there.
The marks were checked on the compression stroke if it makes a difference.

Now I am curious if the engine runs using wasted spark (meaning it fires on compression and exhaust stroke)? I cannot see how it could be anything other than this but would like to know for my own knowledge.

I have not managed a compression test as all my testers are minimum of M14, not the M12 this engine is.

As I was running out of items to check I did pull the stator cover to verify the woodruff key has not sheered. But I still need to pull the flywheel to verify.

Anyone have any other items to check it would be appreciated.
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post #2 of 6 (permalink) Old 06-16-2019, 08:35 AM
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Welcome to the site, I'm not a mechanic but I'm sure the questions will start coming.

FLOYD, SANDI & Sadie is the co-pilot. 05 660, 3000# VENOM WINCH, LED headlight Mod, 12' led light bar RZR seats, Resi shocks, SunF 26 X 9r X 12, CUSTOM PAINT(the rescue chopper can find us know)

"REMEMBER, SPEED KILLS, BUT IT WILL BE THE ONLY TIME YOU'LL DIE LAUGHING"
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post #3 of 6 (permalink) Old 06-18-2019, 05:10 PM Thread Starter
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Posting an update as I don't like it when things are left without closure.

First off using a timing light to verify the flash is between the marks is a pointless procedure as the pickup is on the same component.
Likewise, as the unit is driven by the crankshaft is it a wasted spark design and it makes no difference if it is on compression stroke or not. Also you don't need to ensure that the 3rd dimple is up as it will have no effect on running or starting.

The problem with my rhino became apparent when I pulled off the intake valve adjustment port and cranked over the cylinder with my hand over the port. Massive blowby.

There is also too much play in the big end bearing. Which is too bad because it does have a hot rod stroker crankshaft it would seem.........

So out comes this engine for a full teardown. At least I know it will be good afterwards!
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post #4 of 6 (permalink) Old 06-18-2019, 06:25 PM
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Thanks for the update just wish it was better.

FLOYD, SANDI & Sadie is the co-pilot. 05 660, 3000# VENOM WINCH, LED headlight Mod, 12' led light bar RZR seats, Resi shocks, SunF 26 X 9r X 12, CUSTOM PAINT(the rescue chopper can find us know)

"REMEMBER, SPEED KILLS, BUT IT WILL BE THE ONLY TIME YOU'LL DIE LAUGHING"
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post #5 of 6 (permalink) Old 06-18-2019, 06:59 PM Thread Starter
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I got it cheap knowing it was going to need work. I was just hopeful it wasnt this much needed. The big end has too much play on the conn rod too. So I am pulling it and redoing it.
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post #6 of 6 (permalink) Old 06-19-2019, 04:20 PM
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Now you have me worried about the “Deal” I got my Rhino for. I have a stack of parts waiting for me to get home to work on it, but that’s a bummer about your engine.
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