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Big Block Talk! Everything about swapping a big block engine into your cart! |
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06-18-2009, 06:10 PM | #1 |
Getting Wild
Join Date: Dec 2008
Location: South Carolina
Posts: 137
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Stock clutch on G9 Yamaha
i'm trying to figure out if my stock clutch is messed up i'm takin my old g9 and puttin a 14 hp onan lawn tractor engine in it that has a horizonal shaft and i had an adapter machined to put the stock clutch on but i'm trying to figure out how the clutch on the engine works i fired the motor up on the floor of my shop and time the motor starts the clutch closes up and when you shut the motor down the clutch will not open back up unless i pull it back open with my hands what could be wrong any help would be great thx
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06-18-2009, 06:43 PM | #2 |
Kid no more!!
Join Date: Feb 2007
Location: Bradford, Ontario, Canada
Posts: 750
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Re: Stock clutch on G9 Yamaha
Thats the way a factory clutch is designed to work.
I am not certian about yamaha carts, but for many when they convert their cart to a different engine.. ie. big block, or something that idles, you need to put a special clutch spring that will keep it open when idling. I just dont know if something exists for the yamaha factory clutch. |
06-18-2009, 06:51 PM | #3 | |
Getting Wild
Join Date: Dec 2008
Location: South Carolina
Posts: 137
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Re: Stock clutch on G9 Yamaha
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06-18-2009, 07:39 PM | #4 | |
Sometime's............
Join Date: Oct 2007
Location: Tacoma Washington
Posts: 11,868
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Re: Stock clutch on G9 Yamaha
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06-18-2009, 08:03 PM | #5 | |
Getting Wild
Join Date: Dec 2008
Location: South Carolina
Posts: 137
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Re: Stock clutch on G9 Yamaha
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06-18-2009, 10:12 PM | #6 |
Kid no more!!
Join Date: Feb 2007
Location: Bradford, Ontario, Canada
Posts: 750
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Re: Stock clutch on G9 Yamaha
Those yamaha clutches dont have a return spring in them. The ezgo's and club cars do.
Check it if you dont believe me, take your belt off, and push the clutch in, it will not come back out. When the cart is fully setup.. ie with a belt, its the belt and driven clutch that causes the drive clutch to open back up once you let off the pedal. Thats why im pretty sure they dont have "high rev" spring kits for yamahas. just torque spring kits for the driven clutch. Fireball your probably going to need to go with a comet 780 or similar 1190 clutch for your application to make it function properly and idle. But you could get away with the factory clutch if you are still able to use the factory starter to start up your new engine just like the original cart engine ran when you pressed the pedal. |
06-19-2009, 01:30 AM | #7 | |
Getting Wild
Join Date: Dec 2008
Location: South Carolina
Posts: 137
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Re: Stock clutch on G9 Yamaha
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06-21-2009, 06:38 PM | #8 |
Kid no more!!
Join Date: Feb 2007
Location: Bradford, Ontario, Canada
Posts: 750
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Re: Stock clutch on G9 Yamaha
You said that your new engine was 14hp.. i think you could easily get away with using the original cart starter generator to start your new engine just like how the old one ran.. Start when you push the pedal, off when you let off the pedal.. then you dont need to idle your engine, and can use the factory clutch..
Those yamaha factory clutches are very good, they can almost be completely rebuilt when parts wear out |
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