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New Project - 4/2/2012 12:18 AM   
oldfrog


 

Posts: 96
Score: 100
Joined: 2/27/2011
Last Login: 1/19/2013
From: Muskegon, MI, USA
Status: offline 		Hello everyone,
Well, here comes another airboat (?) project. This one will be based on this Ryobi 30cc engine. It's converted
from a Ryobi backpack leaf blower. The engine went from 5800 RPM to 7200 RPM just by eliminating the stock
muffler. The new exhaust plumbing is fabricated from aluminum and stainless seamless tubing. The oil mix
called for 50:1, but I'm running 32:1 for better lubrication. The 32:1 mix gives just a slight smoke trial. I milled
off the mixture screw walls and cut slots in the mixture screw heads to facilitate the mixture settings. By the
way, I did run the carburetor mounted up-side down and it ran just fine that way too, but I turned it right-side
up afterwards. I removed the crank and cut 1.5 inches from it and rethreaded it with 3/8-24 thread. It also had
an electric start mounted to the back but it looked crazy on there so I fabricated an old timey pulley for it and
it works great...some of you will remember this type of pull-rope system. The engine is running a 16x8 prop
at this time.

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RE: New Project - 4/2/2012 4:07 AM   
Selph-Inflicted



Posts: 1366
Score: 100
Joined: 3/23/2004
Last Login: 5/21/2013
From: Okeechobee, FL, USA
Status: offline 		All its lacking is.....a boat.

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Owner, "Selph-Inflicted" RC Airboats & RC Airboat World
RCAA (Radio Controlled Airboat Association)

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RE: New Project - 4/2/2012 4:23 AM   
Got RPM


 

Posts: 416
Score: 100
Joined: 12/1/2006
Last Login: 5/17/2013
From: Humble, TX, USA
Status: offline 		I really like what you have done with that engine! Clean, well engineered, very professional looking. So many of these conversions look.....much less finished. Good job!



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