Author Topic: 17059272 sticking power valve, primary rods hitting holes in filler block\ jets  (Read 2346 times)

Offline Hillbillyenginering

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Hello cliff.
Great service you are providing.
I have spent a lot of time on here researching my carb\engine spec's.
If most of the people were to research by carb number, then engine displacement. You probably would not have to spend as much time answering questions.
I have you book,understand carbs,and rebuilt a bunch over the years.but this one is kicking my bahukie.
Yes I bought your kit.best supplied I have ever bought.bought the master kit with rods and jets.
Carb number 17059272. Plastic filler block 7041471-22.
The issue is the primary rods are pushed all the way back towards the fuel well\secondaries.they are rubbing the block and the tips are hitting the jets.when manually pushing the power piston,they go down into the jets but not centered.
With the air horn on,pushing down through the air vent.the power piston binds when pushing in the center with a small screwdriver,where the two arms join. But if pushing farther out,it seems to un stick and move. The power piston does feel's loose in its bore. No! It is not new. Forgot to order one.
You know,the excitement and all!
I have ground and polished the area in the air horn , where the top of the power piston  accesses. The arms look straight. Polished the vacume bore also.
I experienced this before on this carb.been on the shelf. With all the up grades to the engine, I figure this is a good platform to build on. Any help would be appreciated.

Offline Ethan1

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 Dumb question, but how clean is the power piston? Could it be a bent power piston arm?
« Last Edit: May 24, 2016, 07:21:54 PM by Ethan1 »
Ethan

1972 Chevelle

(oo______oo)

Offline Hillbillyenginering

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It is super clean.polished it with red 3m pad.
It possible that arm is bent forward, but I can't see it.
Thinking I might need a new power valve. Sticking in the bore, only when the air horn is on is confusing.

Offline Cliff Ruggles

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Can't say as I've ever seen a PV stick in the bore from being too loose. 

I have seen bores with tight spots in them that would cause that issue, usually down in the bottom of the bore.  I use a rifle cleaning tip chucked up in a drill and wound tightly with 400 grit paper to hone them when this happens.....Cliff