**Leaky engine!!!!**

Leaky engine!!!!

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Steve Cosby - 05 Jun 2004 04:14 GMT

I have a 1/8 scale offroad Buggy, as well as a 1/10 scale Traxxas Nitro
Rustler, and the pullstarter is slipping when the engine is cold. I know
the reason for this (the one-way bearing gets caster oil-soaked, but when
it's started (finally) the oil is slung off the shaft, causing grip again),
but does anyone know how to solve this problem?? Note that the 1/8 buggy is
about 1.5 years old, and only run about 15-20 times. It started doing it
after about a gallon of fuel, I think. Thanks,
Steve

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Justin Mahn - 05 Jun 2004 11:39 GMT

New back plate and starter shaft.

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Justin Mahn
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> I have a 1/8 scale offroad Buggy, as well as a 1/10 scale Traxxas Nitro
> Rustler, and the pullstarter is slipping when the engine is cold. I know
[quoted text clipped - 4 lines]
> after about a gallon of fuel, I think. Thanks,
> Steve

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Frater Mus - 05 Jun 2004 20:02 GMT

> I have a 1/8 scale offroad Buggy, as well as a 1/10 scale Traxxas Nitro
> Rustler, and the pullstarter is slipping when the engine is cold. I know
[quoted text clipped - 3 lines]
> about 1.5 years old, and only run about 15-20 times. It started doing it
> after about a gallon of fuel, I think. Thanks,

The OWB starts to grip because the fit changes when it heats up, not
because it's slinging the *castor* oil off.

It's time for a new OWB and starter shaft.

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L.V.X., brother mouse
http://www.mousetrap.net/otr/ Old Time Radio trades
http://makeashorterlink.com/?K16312E06 CBS Radio Mystery Theater database
http://greyhound.mousetrap.net/altus/ retired racing dog

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Steve Cosby - 05 Jun 2004 23:54 GMT

The Buggy isn't that old, so do you generally have to replace the backplate
and starter shaft every year?

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Justin Mahn - 06 Jun 2004 10:29 GMT

Most people simply go with a new engine, but yes. Also, using a starter box
and a non-pull start engine will simplify things quite a bit, as well as
producing more power.

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Justin Mahn
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> The Buggy isn't that old, so do you generally have to replace the backplate
> and starter shaft every year?

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Frater Mus - 07 Jun 2004 14:53 GMT

> The Buggy isn't that old, so do you generally have to replace the backplate
> and starter shaft every year?

Let me suggest an order of events, so it will make more overall sense:

1. OWB gets washed with fuel over time; this is normal.
2.    Fuel evaporates, leaving castor deposits on/in the OWB. This is
also normal.
3. Inside the OWB, tiny leaf springs no longer can push needle
bearings up against the starter shaft.
4.    OWB begins to intermittently slip.
5.    User continues to use slipping OWB, eventually damaging both the
OWB and starter shaft.

If you catch and clean it at step 4 you might not have to buy any
parts.

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[ darkside ] - 06 Jun 2004 19:17 GMT

I had a similar problem with my one-way bearing slipping and the pull start
not working. Filling the engine with WD40 seems to do the trick - I think it
cleans the shaft and bearing and allows it to grip.

My buggy is about 3 years old and I drive it hard and fast then stick it in
a box*. Never replaced any key parts (only breakages) and the WD does the
trick every time. Runs like crazy and works a treat.

*I know this is not 'ideal' but I bought the buggy to do exactly that - have
a blast and some fun!

HTH

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Model Forum / Radio Controlled / Land Models / June 2004

**Leaky engine!!!!**

Leaky engine!!!!