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Evolution 10CC gas engine (Early version no pump on Carb) need help!

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Evolution 10CC gas engine (Early version no pump on Carb) need help!

Old 06-15-2016, 04:59 PM
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Meesh
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Default Evolution 10CC gas engine (Early version no pump on Carb) need help!

I noticed that the new version of this engine has a pumped Carb. on it. If I buy the new Carb from Horizon will it be compatible with this engine?
Would I have to modify anything to make it work?

Thanks in advance for any help I receive.
Old 06-15-2016, 05:23 PM
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ahicks
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Been there, done that. The engine will need a nipple installed in the crankcase for the fuel pump to get it's pressure/vacuum signal for the carb's fuel pump. This will involve pulling the engine down so you can clean up the metal particles left from that operation. After that, you just reassemble and you're good to go. Carb sets up exactly like the original.
Old 06-15-2016, 06:52 PM
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I just put the nipple in the backplate. Much easier.
Old 06-16-2016, 04:26 AM
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Agreed, that would be much simpler. As the back plate is just a few thousands of an inch thick, and the crank/rod swing by very close internally, I'd like more detail on how you did that.
Old 06-16-2016, 05:17 AM
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years ago I did this mod to install a Cline pump on a Moki 2.4.
Cline said to drill thru the motor mount. That gives you plenty of metal to install the nipple without interference with the rod.
Old 06-16-2016, 08:32 AM
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Just tap the backplate in the middle. The crank goes around it. The small OS gas engines get the pressure this way.
Old 06-16-2016, 09:14 AM
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If you say you have a running version of what you are talking about, I believe you. Just looking for that confirmation. Bad information could easily prove to be an unnecessary expensive lesson here.
Old 06-16-2016, 09:41 AM
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Just did it to my 15 also.
Old 06-16-2016, 10:44 AM
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How about a photo of this??? A picture is worth a thousand words !
Old 06-16-2016, 07:10 PM
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It is buried in a plane. You also have to file off the nipple on the inside of the back plate. Flush with the backplate. Easy enough to do. the nipple is soft brass.
Old 06-16-2016, 07:15 PM
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. This is th OS 15gt backplate.
Old 06-17-2016, 03:20 AM
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My concern is regarding how thick the material is that you are drilling and taping for the nipple. If it's not thick enough to carry at least 3 threads or more, thinking there's not enough material there for a solid install.
Old 06-17-2016, 08:47 AM
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It has been done for years. Nothing new.
Old 06-17-2016, 11:17 PM
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Originally Posted by rhd-RCU View Post
It has been done for years. Nothing new.
Yes it's an easy install, mostly fitted on the back plate but if you are concerned about interference with the crankshaft it can also be tapped onto the cylinder port, similar to the NGH 17. http://www.hobbyking.com/hobbyking/s...on_1_8HP_.html
You can also consider keeping your carb and adding a separate fuel pump, the new RCGF 10 pump will turn the standard carb to a pumped setup at a minimal cost, it sells for around $8 at HK and a few bucks more with the local dealer.
http://www.hobbyking.com/hobbyking/s...p_M10013_.html
Old 06-18-2016, 03:31 PM
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Originally Posted by dirtybird View Post
years ago I did this mod to install a Cline pump on a Moki 2.4.
Cline said to drill thou the motor mount. That gives you plenty of metal to install the nipple without interference with the rod.
This how we install the metal nipple on the many engine we converted to Walbro carbs at C&H years ago.Clamp engine mount in drill press vice and drill straight through the the opposite engine mount.Remove engine back plate to clean out shavings.
BCCHI Tired old CH guy.

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