Log in
Search
Latest topics
» A choke-tube with velocity-stack configured Beeby roddie Today at 8:23 am
» WenMac 049 - Glow Plug & Head Gasket replacements?
by Ken Cook Today at 8:06 am
» Prop Rod - resto to a runner
by rsv1cox Today at 7:32 am
» Jim Walkers FireBee - This is going to be fun
by cstatman Yesterday at 6:58 pm
» Hawk had breakfast and then took a bath
by rdw777 Yesterday at 5:38 pm
» Jim Walker Firebaby
by rdw777 Yesterday at 4:58 pm
» Nostalgia alert, my 1959 Corvette revisited
by rsv1cox Yesterday at 2:25 pm
» Prayers for my Wife Please
by akjgardner Yesterday at 10:28 am
» Cox prop rod
by Wiggy Fri May 17, 2024 4:30 pm
» "Red Neck" .049 elec. starter
by getback Fri May 17, 2024 7:19 am
» Cox prop rod
by Wiggy Fri May 17, 2024 5:35 am
» Looking For Comet Tri-Pacer
by latole Fri May 17, 2024 3:45 am
"New" needle valve doesn't fit Black Widow???
Page 1 of 1
"New" needle valve doesn't fit Black Widow???
I have a Black Widow with a metal backplate, double slit cylinder; no history on it as I picked it up with a bunch of other stuff.
I am "rebuilding" as it had a dried fuel pickup, missing gaskets and the needle was bent.
I picked up a pair of "used" cox needle valves from an eBay seller (aerohusker). No complaints there. However, the "new/used" needle valve only goes in about 8 turns while the old, bent one goes in about 12 turns. I noticed because I usually blow on the pickup fuel line to see if the needle will cut off when fully screwed it. In the case of the "new" one, it doesn't. Pic shows "new" vs the old bent one along with the BW backplate. They actually look the same...
BTW, the 2nd "new" needle valve fits properly in a Babe Bee that also needed one. I did swap them, same results
Was there a difference in needle valves for a Black Widow???
Thanks,
Bill
ncpiperpilot- Moderate Poster
- Posts : 28
Join date : 2022-08-11
Re: "New" needle valve doesn't fit Black Widow???
Good day, Bill. As far as I know, the same needle valve is used for all the reed valve metal backplates from the Babe Bee on up, I believe for the plastic backplates for the integral tanked "bee" series engines as well. What may be happening is the threads in the backplate may be slightly distorted from the bent needle valve being used in it. Have you tried lubing the threads and carefully threading the new needle valve in and out several times to see if you can improve the fit? Maybe someone here has a better idea?
Don
Don
pman1111- Silver Member
- Posts : 92
Join date : 2022-01-15
Re: "New" needle valve doesn't fit Black Widow???
If you don't have Berryman's parts cleaner (best option) soak both the needle and the backplate in 91% alcohol overnight and scrub with a toothbrush. Add a drop of Marvel Mystery Oil during assembly.
rsv1cox- Top Poster
-
Posts : 10658
Join date : 2014-08-18
Location : West Virginia
Re: "New" needle valve doesn't fit Black Widow???
Thanks guys. After many tries with both needles, and even a 3rd (bent) one. The "new" one is working and seating properly. I don't know if the upper threads were tight on the new needle or there was some buildup in the bottom of the threads on the backplate that the old ones eventually cleared out but it seems fine now.
ncpiperpilot- Moderate Poster
- Posts : 28
Join date : 2022-08-11
Re: "New" needle valve doesn't fit Black Widow???
Good to see you got it figured out, let us know how it runs!
pman1111- Silver Member
- Posts : 92
Join date : 2022-01-15
Similar topics
» black window questions
» Ex Model Engines - Refurbished Black Widow with KK needle valve - great price
» Best way to lower the ports on an .049 cylinder.
» A REALLY Big Black Widow !!!
» Black Widow RPM
» Ex Model Engines - Refurbished Black Widow with KK needle valve - great price
» Best way to lower the ports on an .049 cylinder.
» A REALLY Big Black Widow !!!
» Black Widow RPM
Page 1 of 1
Permissions in this forum:
You cannot reply to topics in this forum