Model Forum / Radio Controlled / Land Models / January 2004

Save yourself a TON of frustration, and just go get a starter box. Arguably one
of the best investments I've ever made in this hobby.
Go to any RC track where they are runnin' nitro.
You won't find many pull-start engines there. Just about everyone is using a
starter box.
Starting even the most stubborn engine becomes easy.
Once you get one... you'll never look back.
I use a 12 volt gel-cell in mine, and keep it charged with my 1:1 car battery
charger. No fancy R/C *digital pulse* chargers required.
Just do it. You'll thank yourself later.

IMO, many OWB 'failures' are misdiagnosed;  over time castor oil from the nitro
fuel can gum up the tiny leaf springs / rod bearings and keep it from
grabbing its shaft properly.  

A good multi-hour soak in something like methanol or denatured alcohol
followed by light lubrication may free up the innards and return the
OWB to servicability. Bear in mind that if it's been slipping long
enough the OWB or shaft may get damaged.

At the first sign of slippage I'd call tech support for your
manufacturer and get their guidance on how to clean up the OWB.

My 2c, of course.