Is it possible?

[B man]

Can u convert a 4stroke to a 2stroke?

 

[Russ2251]

Nope

 

[B man]

How so?

 

[Russ2251]

2 completely different animals.
Consider how completely different the 2 designs are from each other.
The idea is pointless and self defeating.

 

[B man]

But its not impossible.

 

[sideways]

Anything is possible, if you have to ask then I'd say you don't the skills or machinery to do so.

I'd like to get an old briggs mower engine one day and convert it into a 2 stroke, I modify engines a lot more seriously than most others on this forum though.

 

[DCProductions]

It's not impossible but I don't think it would qualify as a conversion since you would only be left a little bit of the block and crank. Everything else would have to change around it.

 

[Russ2251]

Can't be done.
Why would you want to?

 

[B man]

well i have some old briggs. just askin if it could be done.mostly for a mini-bike i found on CL.

 

[sideways]

Can't be done.

Challenge accepted!

 

[B man]

Challenge accepted!

i 2nd that.

 

[DCProductions]

This is madness!
No wait...
This is Sparta!

 

[Russ2251]

well i have some old briggs. just askin if it could be done.mostly for a mini-bike i found on CL.

Would be far more cost effective to convert a Lawn-Boy to work for a mini bike.

 

[Russ2251]

Challenge accepted!

Foolhardiness...as you will discover.

 

[Russ2251]

Purpose of a 2 cycle engine is for lightweight power in a small package.
With a 4 cycle block you will have neither.

 

[fowler]

all u need is serious tools serious money and alot of time and skill

 

[The Mechtician]

Funny this thread should pop up literally hours after I saw these vids on Youboob;
http://www.youtube.com/watch?v=4uFaI8JcU5E
http://www.youtube.com/watch?v=meSasIYRzzE
http://www.youtube.com/watch?v=UsttJrbR7hs&feature=related

Since it's a uniflow 2 stroke it needs an external scavenging pump, which in this case is a converted lawnmower engine of similar/identical displacement to the converted 2 stroke. It's completely useless and madly impractical, but it runs! I love it The same guy has vids of an opposed piston engine cobbled together from 2 lawnmowers and a sleeve valve engine that runs (and smokes like crazy). All kinds of awesome!

 

[r_chez_08]

do 2 strokes have camshafts? i know it sounds stupid, but i have never worked on one.

 

[anderkart]

do 2 strokes have camshafts? i know it sounds stupid, but i have never worked on one.

Nope, check out this video:

http://www.youtube.com/watch?v=LuCUmQ9FxMU&playnext=1&list=PL7FB6888B3F2CDCCC

 

[devino246]

do 2 strokes have camshafts? i know it sounds stupid, but i have never worked on one.

No. Thats why there so simple, no valves or valvetrain. Reeds work as valves.