Way past clueless!!!

W

wcasey5

Petty Officer 2nd Class
Joined
Feb 27, 2012
Messages
197
Re: Way past clueless!!!

I have no experience with 4 stroke outboards, but I would imagine that it is a dry sump system. So both the oil injected 2 stroke and dry sump 4 stroke would have an oil tank. Of course, THAT is where the simiarity ends. The 2 stroke actually burning oil by design, AND using oil of a completely different specification. Makes one hope they were using 2 stroke oil in their 2 stroke engine.

And even though there are not a lot of 2 stroke cars (60's saabs, east german trabants/wartburgs), there are some 2 stroke diesel truck engines like the GM 71 series (371 up to 16V71, mostly the 671 used in buses and GM/white trucks). I would think that early on in an auto mechanics education, the concept of engine design would arise, from pushrod flathead to multi valve overhead cam, wankel, diesel, and 2 stroke vs 4 stroke.

I must say, it is fun to beat this dead horse! :)
 
Ned L

Ned L

Commander
Joined
Sep 17, 2008
Messages
2,268
Re: Way past clueless!!!

"371 up to 16V71" ... don't forget the little 1-71 & 2-71. Yep they're out there, & that's just the beginning, there is the '92' series right up to the EMD line. AND, ..... look at many of the very early marine engines (cir. 1900) most of those one and two cylinder engines were two cycle (but no oil mixed with gas)
harvey1.jpg


The horse isn't dead yet!! :)
 
bekosh

bekosh

Lieutenant
Joined
Apr 27, 2004
Messages
1,382
Re: Way past clueless!!!

spoilsofwar said:
Rotary engines such as the Wankel are 4 stroke and use rotors rather then pistons.

That animation posted is an interesting thing to look at but would be a nightmare to put into operation, given that it utilizes three crankshafts. lol.
Click to expand...
It's a Napier Deltic opposed piston 2-stroke diesel motor. They were used primarily for ships and locomotives. And were known to be high-strung and maintenance intensive.
 
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