Fuji 25-S engine

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Fuji 25-S engine

Postby GMaestro » Sun Sep 16, 2007 8:05 am

Hi. I've been looking for over a month for some info on this Fuji 25-S engine of mine. I'm trying to find the default needle settings for this engine. A buddy of mine got this thing at a garage sale and gave it to me for almost nothing. It is supposedly new. I haven't run it yet. I can't seem to find a website for just Fuji. Everything is Fuji-Imvac and that doesn't help me. Any info would be greatly appreciated! Thank you.

Greg M
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Postby MECOA » Sat Sep 29, 2007 7:10 pm

http://www.mecoa.com/fuji/

We are the original Fuji Engine.

As for needle valve settings the following is true for all engines...

http://www.mecoa.com/faq/carb/needle_aero.htm


http://www.mecoa.com/faq/index.htm
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Thanks

Postby GMaestro » Tue Oct 02, 2007 1:38 pm

Hi I just wanted to thank you for your helpful info. I appreciate it!
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Fuji 25 tuning issue

Postby GMaestro » Fri Oct 12, 2007 5:24 pm

Hi I used the info given in the previous post and used it to tune my Fuji 25 glow engine. I got it so that it will idle for at least 30 seconds or more, and will rev up to full RPM's qickly and crisply. Now, here is the weird part.... If I go from idle to full throttle quickly, it works perfectly every time. But, if I let it idle for even 5 to 10 seconds, and then idle up at a nice steady rate, at about mid-throttle, it starts to sputter and almost die, and the only way to get it to smoothen out is to go straight back to idle, and then gun it to full throttle. Then it throttles up fully and in a strong way. It only sputters when you go from idle to full in a slow steady manner. Usually it works the other way around. Does this make any sense?
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