[urq] Oil & Crank

fdekat fdekat at sentex.net
Thu Aug 19 10:02:14 EDT 2004

Hello All:

TO expand on MArtin's answer..

Most lawn mower types of engines don't have an oil pump, so they depend on
'splash' lubrication to do the job. On an old  Briggs & Stratton mower motor
that I once took apart, the cam timing gear had a 'dipper', that specifically
dipped a scoop of oil each revolution of the cam, and flung it around. 


-Frank de Kat-

> Message: 1
> Date: Wed, 18 Aug 2004 17:22:56 -0400
> From: "Martin pajak" <martin at quattro.ca>
> Subject: RE: [urq] NAC: Oil level in an oil pan
> Yes, this used to be the case.
> The crank was used to "splash" the bottom of the pistons to lubricate the
> wrist pins.
> In most of the new engines this is not necessary because of the oil
> squirters.
> Also oil in any form (including mist) causes drag on the crank, not large
> but noticable (cause for knife edging of cranks for racing applications
> etc.)
> While back crank touching oil was the "normal" thing.
> Martin Pajak
> http://www.quattro.ca
> 1983 Audi Ur-quattro (305,000 km) for sale : (
> 1985 Audi Ur-quattro (210,000 km) Euro spec. import mit 3B ;o)
> 1971 Porsche 911T (45,000 mi) all original

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