Register Now

Vulcan1 · 04-10-2004, 07:50 PM

For the questions on these. I am not sure what make they are. I was given them with no cowling and I can't find a manufacture name on them. They are about 20cc with a single ring piston. Exhaust is rear, with a reed valve induction on the bottom. They both have walbro carbs and right hand rotation. Also the jugs are held on with 2 bolts and everything is 10/24 thread except the crank.(5/16nf) I am going to do both but eventually I am thinking of pulling an Andrew. Mount both jugs on a crankcase(homemade) with the reed valve and larger carb. Would look as a twin with opposing jugs.
As for the coil on it I have to do some serious

looking at it. I think your thoughts on the field are correct. I am going to see if I can make a plate to turn the coil around and try it. Not much for mounting but will do something. They were running before I got them and want to do a little more. One thing about doing 2 is the made up parts are easy for the second one.
John

Vulcan1 · 04-11-2004, 03:49 PM

I took the flywheel off and removed the key then reinstalled about 20btdc for lh rotation. I mounted a prop and clamped it in my vice and spun it up with the starter. Lo and behold it fires so I squirted some fuel in and hit it and got about 2 barks. That is enough to me to confirm it will run. The only problem with both engines that I don't like is there is a lot of end play and also side play in the crank. Still looking at making a crankcase for them since I have to install new brgs. This is going to be a winter project

so I will set on the back burner and go back to my KJ's.
and Clunk.

John

Flypaper · 04-11-2004, 06:51 PM

Sounds good. Heading in the right direction. Was the muffler held on with springs? If so probably Ryobi. If I knew the bore and stroke I could probably find it in my old book.

Vulcan1 · 04-12-2004, 12:18 AM

Gord,
The muffler is held on with 2 springs. The bore is 1.198"and the stroke is .630. I measured it when it was apart and the stoke could be off a touch but it is close. As I mentioned before there is a lot of play and will take it apart and see if I can put brg.s in it. Don't want to spend to much time on them yet but I might use one for another project to try. If you have the info it would be appreciatted then I can get the right brg.s.
Thanks John

Vulcan1 · 04-12-2004, 09:20 PM

Brian came over tonight and I gave him one engine to try. I got them from him originally so he can see if it runs.

He also told me they where weedeater engines so that might help.
John

AJCoholic · 04-13-2004, 06:37 AM

John,
Some of the weedeater engines are made to run reverse (clockwise) I have one if you want it. Just sitting in my parts engines box...

Flypaper · 04-13-2004, 09:27 AM

John:
Don't have a listing for Ryobi. Poulan doesn't give bore and stroke, only displacement which is 26.2 , and only shows one. Book is getting a little out of date I think. Like me!. You might try that one Andrew was good enough to offer. then you have something to compare to. Sorry I couldn't help more.

Vulcan1 · 04-13-2004, 11:13 AM

Andrew,
Thanks again but I want to go back to my KJ's. I have left them to long and need to get at least one running. I think these could be a winter project as I was looking at them to make a twin horizontally opposed. The rods and pistons are good but the crank brgs. are the pits. They are needle but way to small. What do you make your cranks out of

:When looking around I will see if I can find some material before I do anything. I already have some 6061 that I can make the case out of and I think it would look good with a carb on top andtwin exhaust on the bottom. Hell by next Fall I might have more and go for a quad.

John

AJCoholic · 04-13-2004, 05:03 PM

I used 4340 alloy steel, tough to machine but stong stuff

04-10-2004, 07:50 PM	#21
Vulcan1 RCC Supreme Contributor I am: John Davidson Join Date: Feb 2003 Location: Vulcan,Alberta Radio of choice: EVO(12), Futaba # of RCs: ? Feedback: 0 / 0% Posts: 2,927 Total Props: 0	Remove this ad - become a site supporter! For the questions on these. I am not sure what make they are. I was given them with no cowling and I can't find a manufacture name on them. They are about 20cc with a single ring piston. Exhaust is rear, with a reed valve induction on the bottom. They both have walbro carbs and right hand rotation. Also the jugs are held on with 2 bolts and everything is 10/24 thread except the crank.(5/16nf) I am going to do both but eventually I am thinking of pulling an Andrew. Mount both jugs on a crankcase(homemade) with the reed valve and larger carb. Would look as a twin with opposing jugs. As for the coil on it I have to do some serious looking at it. I think your thoughts on the field are correct. I am going to see if I can make a plate to turn the coil around and try it. Not much for mounting but will do something. They were running before I got them and want to do a little more. One thing about doing 2 is the made up parts are easy for the second one. John __________________ John Davidson Keep the shiny side up and the wheels down
	.

04-11-2004, 03:49 PM	#22
Vulcan1 RCC Supreme Contributor I am: John Davidson Join Date: Feb 2003 Location: Vulcan,Alberta Radio of choice: EVO(12), Futaba # of RCs: ? Feedback: 0 / 0% Posts: 2,927 Total Props: 0	I took the flywheel off and removed the key then reinstalled about 20btdc for lh rotation. I mounted a prop and clamped it in my vice and spun it up with the starter. Lo and behold it fires so I squirted some fuel in and hit it and got about 2 barks. That is enough to me to confirm it will run. The only problem with both engines that I don't like is there is a lot of end play and also side play in the crank. Still looking at making a crankcase for them since I have to install new brgs. This is going to be a winter project so I will set on the back burner and go back to my KJ's. and Clunk. John __________________ John Davidson Keep the shiny side up and the wheels down
	.

04-11-2004, 06:51 PM	#23
Flypaper RCC Pro Contributor I am: Gord C Join Date: Sep 2002 Location: kingston Ont. Feedback: 1 / 100% Posts: 1,863 Total Props: 8	Sounds good. Heading in the right direction. Was the muffler held on with springs? If so probably Ryobi. If I knew the bore and stroke I could probably find it in my old book. __________________ Tried for my kamikazi pilots licence. Flunked the test. Gord. MAAC 5276
	.

04-12-2004, 12:18 AM	#24
Vulcan1 RCC Supreme Contributor I am: John Davidson Join Date: Feb 2003 Location: Vulcan,Alberta Radio of choice: EVO(12), Futaba # of RCs: ? Feedback: 0 / 0% Posts: 2,927 Total Props: 0	Gord, The muffler is held on with 2 springs. The bore is 1.198"and the stroke is .630. I measured it when it was apart and the stoke could be off a touch but it is close. As I mentioned before there is a lot of play and will take it apart and see if I can put brg.s in it. Don't want to spend to much time on them yet but I might use one for another project to try. If you have the info it would be appreciatted then I can get the right brg.s. Thanks John __________________ John Davidson Keep the shiny side up and the wheels down
	.

04-12-2004, 09:20 PM	#25
Vulcan1 RCC Supreme Contributor I am: John Davidson Join Date: Feb 2003 Location: Vulcan,Alberta Radio of choice: EVO(12), Futaba # of RCs: ? Feedback: 0 / 0% Posts: 2,927 Total Props: 0	Brian came over tonight and I gave him one engine to try. I got them from him originally so he can see if it runs. He also told me they where weedeater engines so that might help. John __________________ John Davidson Keep the shiny side up and the wheels down
	.

04-13-2004, 06:37 AM	#26
AJCoholic RCC Supreme Contributor I am: Andrew Coholic Join Date: Sep 2002 Location: Timmins, Northern Ontario Radio of choice: JR 12X, 28X Feedback: 47 / 100% Posts: 12,277 Total Props: 61	John, Some of the weedeater engines are made to run reverse (clockwise) I have one if you want it. Just sitting in my parts engines box... __________________ Andrew Coholic -MAAC #26287L 1/2A to giant scale, IMAC, SAM, R/C sport, turbine jets, Heli's... if its got a wing or two and an engine - I like it!
	.

04-13-2004, 09:27 AM	#27
Flypaper RCC Pro Contributor I am: Gord C Join Date: Sep 2002 Location: kingston Ont. Feedback: 1 / 100% Posts: 1,863 Total Props: 8	John: Don't have a listing for Ryobi. Poulan doesn't give bore and stroke, only displacement which is 26.2 , and only shows one. Book is getting a little out of date I think. Like me!. You might try that one Andrew was good enough to offer. then you have something to compare to. Sorry I couldn't help more. __________________ Tried for my kamikazi pilots licence. Flunked the test. Gord. MAAC 5276
	.

04-13-2004, 11:13 AM	#28
Vulcan1 RCC Supreme Contributor I am: John Davidson Join Date: Feb 2003 Location: Vulcan,Alberta Radio of choice: EVO(12), Futaba # of RCs: ? Feedback: 0 / 0% Posts: 2,927 Total Props: 0	Andrew, Thanks again but I want to go back to my KJ's. I have left them to long and need to get at least one running. I think these could be a winter project as I was looking at them to make a twin horizontally opposed. The rods and pistons are good but the crank brgs. are the pits. They are needle but way to small. What do you make your cranks out of :When looking around I will see if I can find some material before I do anything. I already have some 6061 that I can make the case out of and I think it would look good with a carb on top andtwin exhaust on the bottom. Hell by next Fall I might have more and go for a quad. John __________________ John Davidson Keep the shiny side up and the wheels down
	.

04-13-2004, 05:03 PM	#29
AJCoholic RCC Supreme Contributor I am: Andrew Coholic Join Date: Sep 2002 Location: Timmins, Northern Ontario Radio of choice: JR 12X, 28X Feedback: 47 / 100% Posts: 12,277 Total Props: 61	I used 4340 alloy steel, tough to machine but stong stuff __________________ Andrew Coholic -MAAC #26287L 1/2A to giant scale, IMAC, SAM, R/C sport, turbine jets, Heli's... if its got a wing or two and an engine - I like it!
	.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

vBulletin Message

Cancel Changes

Register Now

Log-in