The newer ones are a lot cleaner than in the old days. Many run with as little as 40:1 or less. Semi permanent go for the 4 stroke. Portable-2 stroke.

Dennis

----- Original Message -----
From: Alistair Bell <albell@uvic.ca>
Date: Thursday, September 8, 2005 11:20 am
Subject: Re: Carrying a large outboard in a Vanagon (plus some NVC outboard motor 2 stroke vs 4 questions)

> The big down-side, IMO, to 2 strokes is the amount of oil they can
> put
> into a lake.
>
> Alistair
>
>
>
> On 8-Sep-05, at 8:03 AM, Dennis Haynes wrote:
>
> If your going to be removing the engine and laying it down for
> storage,
> transport etc, the 4 stroke is out. Even with draining the oil all
> the
> time, it will make a mess and oil getting past the rings will be
> problem. With the 2 stroke, just disconnect the fuel line and run
> it
> until it stops. Yes, you will have to mix the oil with the gas,
> but no
> oil changes. One of those luggage carriers attached to a class 3
> hitch
> will hold that motor outside the van. 2 strokes are a bit smoky
> but
> they develop power every piston down stroke. Also, most use reed
> valves
> so there are no cams, lifters, rockers, etc. That is why they are
> so
> light.
>
> Dennis
>
>