engine problems

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Ashley - 28 Jan 2004 21:50 GMT

I recently got the Kyosho Inferno MP 7.5 RTR which came with the
Kyosho GX21 engine. After running several tanks of nitro through it to
break it in I've begun driving it around. The high and low needles are
the same from the breakin process. The problem I'm having is when I
give it full throttle it bogs down and sometimes conks out. It kinda
makes a deep "wabwabwab" sound. Eventually it begins a slow
acceleration then goes pretty fast. I'm not sure how I need to adjust
the settings to fix this. Should I lean it out? I turned the HSN in by
an eight of a turn but that did more harm than good - it then had a
hard time idling.

thanks
ashley

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mike - 30 Jan 2004 01:50 GMT

A few things to investigate:

. Is the thing blowing blue smoke when flat out? If not, it should be
richened.

. What fuel, in particular nitro content are you using?

. What plug are you using?

From http://www.rcuniverse.com/magazine/article_display.cfm?article_id=141 I
found the following:

"On my first run on a rough dirt track, the engine kept flaming out on me
when I hit full throttle. I made some adjustments to the needle and the
problem still persisted. I made a quick call to a local hobby shop and
they suggested switching the factory plug to an OS A3 plug. They also
suggested switching to Duratrax Red Alert 20% racing fuel. Following
these suggestions, all my engine problems went away and this buggy really
came to life. "

Which I think covers your problem!

Mike

> I recently got the Kyosho Inferno MP 7.5 RTR which came with the
> Kyosho GX21 engine. After running several tanks of nitro through it to
[quoted text clipped - 9 lines]
> thanks
> ashley

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Ashley - 30 Jan 2004 21:49 GMT

Thanks for your suggestion. I'm using 20% nitro with A3 glow plugs.
I'm thinking it's too rich but don't have enough experience to say for
sure. I bought a temp gauge that I want to use because I don't want to
burn it up if I start to lean it out.

The engine is set rich and it's cold out right now so it's hard to
start. As the engine gets warmed up it starts to die and lose
responsiveness so that's why I'm thinking I need to lean it out. I
guess I've have to experiment some more.

> A few things to investigate:
>
[quoted text clipped - 33 lines]
> > thanks
> > ashley

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mike - 02 Feb 2004 04:42 GMT

Hi Ash,

One further thing I should have mentioned is that I would either clean or
replace the air filter.

Mike

> Thanks for your suggestion. I'm using 20% nitro with A3 glow plugs.
> I'm thinking it's too rich but don't have enough experience to say for
[quoted text clipped - 43 lines]
> > > thanks
> > > ashley

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Divrdan007 - 01 Feb 2004 13:43 GMT

>Subject: engine problems
>From: ashleym72@mail.com (Ashley)
>Date: 1/28/2004 4:50 PM Eastern

>I recently got the Kyosho Inferno MP 7.5 RTR which came with the
>Kyosho GX21 engine. After running several tanks of nitro through it to
[quoted text clipped - 9 lines]
>thanks
>ashley

Kyosho engines are notorious for developing air leaks around the carb.
If the carb is leaking air, you will be chasing those needle settings all day
long... and still won't get it to run right.
Replace the *O* ring under the base of the carb, or use some kinda sealer
around it.
(some have suggested RTV sealer, see link below)

http://www.partsexpress.com/pe/pshowdetl.cfm?&PartNumber=341-882&DID=7

Make sure the collar at the base of the carb, is good-n-tight too.
No offense intended, but as soon as your engine starts to show signs of wear,
start shopping for another engine.
Anything BUT a Kyosho engine will be a marked improvement.
You may have better luck, but MY Kyosho engine sucked.

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Model Forum / Radio Controlled / Land Models / February 2004

engine problems