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Discussion Starter · #1 ·
I replaced a blown 13hp Kohler (CV13S) with a 12.5hp Kohler (CV125S) BUT the 12.5hp does not have a setup for a mechanical fuel pump. Apparently the carb was gravity fed in its previous life.
How can I pick up a pulse for a vacuum fuel pump.
The motor will start and run for 10 second then starve out when I tried to use fitting off the top of the valve cover that went back up to the carb. No success.
I am now considering trying to install a fitting into the dip stick tube and trying to pick up a pulse from there. Briggs uses this system.
Does anyone else have a solution ???
 

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See my reply in the John Deere forum.
 

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Discussion Starter · #3 ·
Kohler 12.5hp without mechanical fuel pump. Install a vacuum pump ?

I would like to thank those that offered solutions to my conundrum. I tried each suggestion but ended up drilling and tapping a hole near the top of the plastic dip-stick tube (thicker than I imagined). I then screw a fitting into the tube and ran a hose to the vacuum side of the pump.
The pulse generated from the dip-stick tube was much stronger than the pulse created from the valve cover. The pulse from the valve cover was not strong enough to drive the pump.

Just another day in school.
Feel free to contact me if you have any questions.

Thanks again everyone.
 
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