Duclos Maveric gearless hit and miss

Help Support HMEM:

fabricator

New Member
HMEM Supporter
Joined
Feb 7, 2020
Messages
3
Reaction score
0
Location
West Michigan
Hello all this is my first post here, I just found the site and like it very much. I recently found this little engine at a pawn shop of all places. I had no idea what it was at first but I knew I needed it. After a long web search I found out it is the Maveric by Philip Duclos featured as a build in several issues of home shop machinist magizine in the mid 90s. I have a well equipped home shop myself and would like to make it run. Unfortunately at some point in its life it appears to have been dropped and from the pictures I can find it looks like the air intake which had the venturi and needle valve set up was broken off almost flush with the intake valve block. The valve block has a what looks like a lapped spring-loaded atmospheric intake valve. I intend to turn out a brass intake horn, my question is I have no experience with these little engines would like to know if anybody can point me in the right direction for a good way to build the needle valve.
 

Brian Rupnow

Well-Known Member
Project of the Month Winner
Joined
May 23, 2008
Messages
11,986
Reaction score
4,550
Needle valves are a big problem, until you discover the sewing needle thru a brass spindle trick. It's too much to tell you about, but I'm attaching a link to a download of a carburetor that will show you. This carburetor would probably work for your engine if you decide just to build a new carburetor.---Brian
http://www.mediafire.com/file/4hgamd0f77j711m/JAG_CARBURETOR_IN_INCHES.zip/file
 

fabricator

New Member
HMEM Supporter
Joined
Feb 7, 2020
Messages
3
Reaction score
0
Location
West Michigan
That does look excellent. I think from the pictures I've found this had something like a 1/8" round piece of brass through the intake tube. That must be the problematic type you are talking about. I assume from your reference to a sewing needle you would have a small inlet hole with the needle to seat in it. With any of these methods I assume you need to have a very good piston fit to get enough suction to make the venturi work.
 

Brian Rupnow

Well-Known Member
Project of the Month Winner
Joined
May 23, 2008
Messages
11,986
Reaction score
4,550
Any kind of i.c. engine requires an almost air tight seal between the piston and the cylinder walls.
 

fabricator

New Member
HMEM Supporter
Joined
Feb 7, 2020
Messages
3
Reaction score
0
Location
West Michigan
Oh absolutely, the thing is I have no idea who built this engine so I'm going to have to take it apart and check that fit.
 

Latest posts

Group Builder
Top