I still have to buy R-12 nd R-22 for some customers that refuse to upgrade their systems.... And don't get me started on Halon. LOL. Never drank Zima so can't comment on it.
I gotta agree with Skunk though... 4 strokes are the way to go.
Pros... Better fuel economy, less pollution, cleaner water, quieter.
Cons.. Heavy, costly to maintain.
I want one, but for now will have to stick to my 200hp 2 stroke Merc. Great engine.
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1987 V20 w/1987 150HP Yamaha on a Shoreland'r Trailer
1978 16.5 Airslot w/1996 120HP Force on a Four Winns trailer
1996 V21 w/1993 200HP Mercury on a Shoreline Trailer
All towed by a 5.7L Hemi Durango.
If God didn't have a purpose for us we wouldn't be here, so
Live simply, Love generously, Care deeply, Speak kindly.
(Leave the rest to God) 
Silence, in the face of evil, is itself evil. Not to speak is to speak, not to act is to act. God will not hold us guiltless.
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