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12-20-2011, 07:17 AM
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Join Date: Jan 2005
Location: West Chester, Pa
Posts: 583
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saftey washer part number needed for MA4-5
I have a MA4-5 carb and I need to purchase the copper saftey washer that locks the inlet strainer assembly. I have a Service manual that shows an exploded view of the parts but no part numbers. Anyone know the part number or have a parts list?
Any help appreciated.
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Jeff Vaughan
RV 12 N237VW ELSA
RV 7A N561EV Sold
West Chester Pa
2020 donation current
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12-20-2011, 08:32 AM
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Join Date: Aug 2010
Location: Wichita, KS
Posts: 1,957
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Is it #54 on this page? It's the only part in my manual that says "safety washer". If so, the manual I have says the part number is A78-121.

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Kurt W.
RV9A
FLYING!!!
Last edited by krw5927 : 12-20-2011 at 10:32 AM.
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12-20-2011, 08:37 AM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,666
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Walt Aronow, DFW, TX (52F)
EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1700+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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12-20-2011, 10:47 AM
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Join Date: Nov 2007
Location: Cary, N.C.
Posts: 1,216
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The ACS p/n is "MC16-A48". Works fine. I just replaced mine last week during my annual condition inspection.
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Noel
RV-6A N6NF
tip-up
flying
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12-20-2011, 01:06 PM
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Join Date: Jan 2005
Location: West Chester, Pa
Posts: 583
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Thanks guys!!!
Merry christmas!!
__________________
Jeff Vaughan
RV 12 N237VW ELSA
RV 7A N561EV Sold
West Chester Pa
2020 donation current
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12-20-2011, 01:37 PM
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Join Date: Nov 2007
Location: Yarmouth, Nova Scotia
Posts: 2,405
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Kurt, should be PN 21 on your diagram.
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12-21-2011, 08:34 AM
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Join Date: Aug 2010
Location: Wichita, KS
Posts: 1,957
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Quote:
Originally Posted by Ron B.
Kurt, should be PN 21 on your diagram.
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In that case noelf has it. My OH manual says that part number is A16-A48. Looks like the ACS MC16-A48 is the same thing.
__________________
Kurt W.
RV9A
FLYING!!!
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12-22-2011, 03:35 AM
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Join Date: Nov 2007
Location: Cary, N.C.
Posts: 1,216
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Also, there was a recent "Tips for Homebuilders" video on EAA's website that shows how to remove, clean, and reinstall the finger screen. A new lock gasket is used and torqued. The torque value stated in the video is twice the value given in the actual Marvel-Schebler service documentation.
__________________
Noel
RV-6A N6NF
tip-up
flying
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