masonjs at nrtco.net
Sat Nov 21 14:26:50 PST 2009
> To add a bit of detail, the old port (and reed valve for that matter) 2
> strokes also always had roller bearing connecting rods, top and bottom.
> They were lubricated ONLY by the oil in the fuel/oil mix that was floating
> around in the bottom end.
Amazing they lasted as long
I've got an old green 1955 Johnson 10 HP twin 2 stroke outboard, still in
excellent running condition with only one water pump impeller replaced,
lower unit 90 SAE oil every season. It originaly ran 20-1 mix of 30 SAE non
detergent oil which required a lot of spark plug cleaning (but a great
mosquito and black fly deterent). With the newer 2 cycle oils it runs well
on 40 -1. Not too shabby for 54 years old.
More information about the GPZList