Larger conversions / Twin conversions
 

Anyone know or 50+ cc engines that can be converted?

Any twin conversions?

Anyone ever made a twin by bashing the two singles and fabricating a new case and crank?

I did a serch on the topic but didn't find to much so I appologize if this is covered in another thread.

GB

RE: Larger conversions / Twin conversions
 

Only chainsaw twin ever made was the Echo 62cc, no longers sold here in the US.,.Parts are still available, and D&B engines makes a twin using the crank and cylinders...Pricey parts....
One of my customers made a big twin using 2 Husky cylinders..Made his own case and put two cranks together..Works great.....It CAN be done..Easier to buy one........[8D]
I have a customer's inline twin made from 2 Quadra 50s...Made in Canada, called a Merlin...Heavy and very pricey....Also had an inline twin made from 2 G62...The hardest thing to get right on an inline twin is the coupling between the engines...Most grind a hex on the cranks and use a hex coupler...Precision Eagle twins and a few others were made this way...

RE: Larger conversions / Twin conversions
 

Only chainsaw twin ever made was the Echo 62cc, no longers sold here in the US.,.Parts are still available, and D&B engines makes a twin using the crank and cylinders...Pricey parts....
One of my customers made a big twin using 2 Husky cylinders..Made his own case and put two cranks together..Works great.....It CAN be done..Easier to buy one........[8D]
I have a customer's inline twin made from 2 Quadra 50s...Made in Canada, called a Merlin...Heavy and very pricey....Also had an inline twin made from 2 G62...The hardest thing to get right on an inline twin is the coupling between the engines...Most grind a hex on the cranks and use a hex coupler...Precision Eagle twins and a few others were made this way...
Once in a while the Echo twin will show up on ****, also sold by John Deere, same engine...

RE: Larger conversions / Twin conversions
 

The thing about large singles is that you can get more port area compared to a twin.
Larger ports = more power.

Ralph

RE: Larger conversions / Twin conversions
 

Thanks for the replies guys.

I have been contemplating the step to gas for a long time and have been thinning my hanger in order to migrate that way.

In addition to moving up to gas I am also interested in machining / converting my own engines. My dad was a tool and die maker and first class machinist for 40+ years and since he has retired (10+ years ago) he is itching to get back ona engine lathe & mill so we are looking for a project(s).

Ideally it would be really cool to machine / mill a new crank case and shaft and untilize existing pistons and jugs, etc. for the top end.

However, neither my dad or I have enough small engine experience to design and fabricate the crank, although I suppose some research could solve that problem.

I have been following the threads here on conversions and find them fascinating.

I have also visted your webpage RCIGN1 and it is very impressive and cool especially the drone engine :D.

Are there any other web sites which have similar information on conversions and design that you guy's are aware of?

GB

RE: Larger conversions / Twin conversions
 

if you want to try your luck with some Sachs engines i have some parts here to offer also a Husqvarna.

RE: Larger conversions / Twin conversions
 

Hello geardaddy,

I am somewhat familiar with sachs engines and the Husqvarna line.

Tell me more.

What do you have?

What is usable?

Are these parts of a retired engine?

Displacement, etc.

GB

RE: Larger conversions / Twin conversions
 

Have plenty of 5.8 parts and one complete 61cc husky which would be a good place to start on a 120cc twin. Have some 2.4 sachs also. All are saw engines in good shape, the duds go in the scrap bin.