Bill,
The rollers on the crank are caged, the needles on the wrist pin are not.
As I recall the outboards use Torrington (sp?) bearings... is that who you
work for? I believe that OMC and Mercury both use the same source.
I was an engineer for OMC in a previous life (or at least it seems that long
ago) and a lot of those brain cells have died.
Greg
----- Original Message -----
From: "Bill Bennett" <benettw@earthlink.net>
To: <V4GR@aol.com>; <land-speed@autox.team.net>
Sent: Wednesday, September 20, 2000 9:18 PM
Subject: Re: Outboards
> Rich you called them roller and ball. I would have thought that it
> might have been a caged needle bearings. I believe the company I work
> for makes the caged needle assembly for those motors. I am not for
> sure as that part is made at a different plant. One thing to take into
> consideration is the hardness of the needle compared to the crank
> surface. If the surface of the crank is too soft then you will end up
> destroying the crank. If the needles are softer you will wind up
> pounding the needles out of the cage especially on the rods. Remember
> what a spun rod bearing looks like! My thought would be maybe some
> type of hard chrome or other type of surface treatment coating that is
> applied with heat. The needles are not chromed they are just polished
> after grinding. I have seen these assemblies in cam bearings, but
> never on the rods and mains. Thoughts of pounding from the rods and
> end thrust control on the mains?
>
> BillB
>
> ----- Original Message -----
> From: <V4GR@aol.com>
> To: <land-speed@autox.team.net>
> Sent: Wednesday, September 20, 2000 6:38 PM
> Subject: Outboards
>
>
> > I went to look at some outboard motors today. Mercs. 2 liter 4
> cylinder at
> > 200 hp and a 3 liter V6, don't know the power. They do use roller
> and ball
> > bearings for rods and mains. I am thinking that offset grinding
> welding and
> > grinding back to original dia. may work. I am not sure nitriding
> will strand
> > up to roller bearing pressure. Also the powerheads are expensive.
> > This weekend I went to the Silver State Race, at Wes Potters
> suggestion. It
> > was great. 80 miles of 2 lane blacktop wide open. Winner was an old
> Tony
> > Stewart Winston Cup car at 202 average. I was about 2 miles down a 5
> mile
> > straightway and the cars were moving when they went by. Rich Fox
> >
> >
>
>
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