Mystery Screw - HELP!
Thread Starter
Le Mans Master
Joined: Mar 2004
Posts: 7,463
Likes: 1,485
From: Little Rock AR
Mystery Screw - HELP!
I just finished an engine rebuild, and a few carb rebuilds and all went well except for THIS! 
I found THIS left on the work bench. 
Where does it go? Holley? Rochester? Comp cams? Poulan? Weedwhacker? WHAT!?!
I am so "screwed"
-Mark.
I found THIS left on the work bench. Where does it go? Holley? Rochester? Comp cams? Poulan? Weedwhacker? WHAT!?!
I am so "screwed"
-Mark.
Thread Starter
Le Mans Master
Joined: Mar 2004
Posts: 7,463
Likes: 1,485
From: Little Rock AR
I am about to just fire it up and hope for the best. If it was a 3/8" coarse nut or a 1/4-20 screw I would just blow it off but this baby looks IMPORTANT! Dang! 
-Mark.
-Mark.
Racer
Joined: Apr 2001
Posts: 395
Likes: 0
From: Shoreline WA
Because of the angled head towards the threads and its apparent size, my guess would be one of the two screws that go inside the primaires of a Rochester Q-Jet that hold the top of the carb to the main body.
Mike
Mike
Last edited by SLine78; Aug 25, 2004 at 11:49 AM.
Race Director
Joined: Sep 2002
Posts: 10,362
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From: San Diego - Deep Within The State of CONFUSION!
Originally Posted by SLine78
Because of the angled head towards the threads and its apparent size, my guess would be one of the two screws that go inside the primaires of a Rochester Q-Jet that hold the top of the carb to the main body.
Mike
Mike
Safety Car
Joined: Oct 1999
Posts: 4,101
Likes: 10
From: NorCal
Nope, those Rochester screws are flat on top, but it does look like a carb screw. Choke assemblies, idle solenoids and pull-offs sometimes use tapered seat screws, but I don't recognize that one and I've done a TON of carbs over the last thirty years.
Hans
Hans
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Safety Car
Joined: Jul 2002
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From: St. Charles IL
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Originally Posted by SLine78
Because of the angled head towards the threads and its apparent size, my guess would be one of the two screws that go inside the primaires of a Rochester Q-Jet that hold the top of the carb to the main body.
Mike
Mike
But Wrencher makes a very valid point as well. I haven't seen that oval shaped head on the carbs I've done either. Look at the air horn, choke pull off, and idle stop solenoid to see if there might be a screw missing.
Safety Car
Joined: Oct 1999
Posts: 4,101
Likes: 10
From: NorCal
Originally Posted by joe73vette
Is that the one that does in from the bottom of the carb? joe
Hans
Thread Starter
Le Mans Master
Joined: Mar 2004
Posts: 7,463
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From: Little Rock AR
Originally Posted by Wrencher
Those are very similar to the ones that hold the top onto the main body, except the ones in the base are phillips head instead of flat blade screws. I often find them swapped by accident.
Hans
Hans
I went ahead and fired up the engine today. After a heater hose incident and the customary new fuel line blues it seems to be ready to tune at this time. The new exhaust sounds nice and quiet too.
I think the best way to find out what the screw goes to is to throw the screw in the trash. The answer will come to me as the garbage truck drives off.
It usualy goes that way for me. 
-Mark.
Burning Brakes
Joined: Jul 2001
Posts: 853
Likes: 0
From: Foxfield, Co
Originally Posted by corvgreg
It looks like the screw for the idle selenoid bracket on the front of the carb. Should be phillips head though.
Greg
Greg
Thats exactly what it is. Mine is a straght blade and looks just like that.
Greg
Thread Starter
Le Mans Master
Joined: Mar 2004
Posts: 7,463
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From: Little Rock AR
Originally Posted by greg454
----
Thats exactly what it is. Mine is a straght blade and looks just like that.
Greg
Thats exactly what it is. Mine is a straght blade and looks just like that.
Greg
Do you have only one screw holding the idle stop solenoid?
I have 2 screws holding the idle stop solenoid on to the side of the carb and they are both philips style and slightly smaller than this one. I was not sure if that solenoid was for the idle stop or maybe used for when you fire up the A/C unit.
Either way the 2 screws that hold it on are still there.You guys had my hopes up there for a minute. Keep the guesses coming.
-Mark.
Melting Slicks
Joined: Dec 2000
Posts: 2,198
Likes: 2
From: Eastern Connecticut
Did you have any helpers? One time I helped a friend put together a motor, and left him a spare bolt or something I had laying around. It took him a while to figure out it wasn't necessary. LOL JOe
Burning Brakes
Joined: Jul 2001
Posts: 853
Likes: 0
From: Foxfield, Co
Originally Posted by stingr69
Greg or Greg,
Do you have only one screw holding the idle stop solenoid?
I have 2 screws holding the idle stop solenoid on to the side of the carb and they are both philips style and slightly smaller than this one. I was not sure if that solenoid was for the idle stop or maybe used for when you fire up the A/C unit. Either way the 2 screws that hold it on are still there.
You guys had my hopes up there for a minute. Keep the guesses coming.
-Mark.
Do you have only one screw holding the idle stop solenoid?
I have 2 screws holding the idle stop solenoid on to the side of the carb and they are both philips style and slightly smaller than this one. I was not sure if that solenoid was for the idle stop or maybe used for when you fire up the A/C unit.
Either way the 2 screws that hold it on are still there.You guys had my hopes up there for a minute. Keep the guesses coming.
-Mark.
Greg.