|05-09-2010, 06:09 PM||#11|
Join Date: Nov 2009
Location: abbotsford bc
Feedback: 0 / 0%
Total Props: 0
Re: rio 51
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Hi .I have a rio.It fires on every pull but will not catch and run.Can you suggest a needle setting to start with.I believe i have tried everything but if your works please let me know.
|05-09-2010, 10:26 PM||#12|
I am: Den O.
Join Date: Jan 2007
Location: East Oakville
Radio of choice:
Futaba 14SG, 7C
Feedback: 23 / 100%
Total Props: 4
Re: rio 51
Well, the Rio 51 has certainly been a source of frustration for anyone who has owned one. It's a great performing hull but everything else, radio, engine, exhaust system, prop drive, etc, are all crap.
Per the designer's (Grimracer) suggestion, close both needles then open the low-speed needle 2 1/2 turns, and the high-speed needle 1 1/8 turns. I found the low-speed setting a bit rich, so after a couple tanks I leaned the low-speed needle in 1/8 turn increments until I got smooth throttle response with no stumbling. I think my low-speed setting is now at ~1 5/8 or 1 3/4 turns...but everyone is different.
Make sure you're getting a really good prime....I plug the venturi with my hand, remove the spark plug wire, and crank it until the carb is quite wet.
Also, check your idle trim settings on your transmitter...you may simply not have the carb butterfly open enough to start the engine.
Another important tip....the cooling system does not flow freely enough and things get quite hot very quickly....I added a second pickup tube and exit spout for the cylinder head. The exhaust manifold and muffler jacket are using the original water pickup/exit. I also replaced the stock cooling lines with larger diameter silicon lines for better water flow...this is a common fix.
Good luck with it!
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