HS4 jets?

[AlanT]

Hi All,

Ive noticed slight dampness down the outside of the wax stat jets after shutting down my Spit 1500 engine. The carbs haven’t seen action for 20 years but I did clean / strip them thoroughly .

Thoughts? I’m thinking new jets and needles. 

It’s enough to smell, not drip!

Thanks 

[Pete Lewis]

there is no seal between jet tube and the adjusting holder 

so any fuel in the carb throat can run down the jet 

do the 2p mod  prise the thin cap off the bottom of the jet  remove the wax capsule   , keep the small metal spacer    add two 1p peices  refit/crimp the retaining cap 

then no more wax stat irregularities 

pete

[AlanT]

Thanks Pete. So what you’re saying is that it’s normal? Does seem a tiny amount. 
I’ll prob leave the waxstats on for the moment having owned a 9 year old Spit (basket case) when I was about 20!  The one thing that did run well was the engine! 

[Pete Lewis]

yes a bit of misting is not unusual 

if you disconnect the choke levers the jet tube is a loose fit in the holder it just pulls out 

it moves up/down easy every time you use choke  

its just a brass tube in a brass fitting hole   no seals at all

vacuum in the carb throat stops any real leakage spilling down the jet  tube clearance 

Pete

[AlanT]

Great. Thanks