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01-16-2010, 08:40 PM
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Join Date: Sep 2007
Location: Albuquerque, NM
Posts: 659
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Alternator mount bolts?
This seems like a dumb question, but I have to ask anyway 
I decided to use an 87 suzuki samurai alternator on my build, and I'm trying to figure out which bolts are used to mount it. The bolt holes on the alternator measure .335" or 8.52mm. An 8mm bolt (.315") seems a bit sloppy. Does someone make an 8.5mm bolt? Or 21/64"?
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Andy Compton, PhD EE
RV-10 - #41414 (building)
RV-9A - N643AC (built,flying,sold,missed)
My blood and sweat, the Wifey's tears
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01-16-2010, 09:30 PM
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Join Date: Jun 2006
Location: 8I3
Posts: 3,562
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Why not make a thin sleeve bushing so you can use a 5/16" bolt? Or just drill out the mounting holes to 3/8"?
My experience with these alternators is the bolt holes will elongate if they're loose.
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Please don't PM me! Email only!
Bob Japundza CFI A&PIA
N9187P PA-24-260B Comanche, flying
N678X F1 Rocket, under const.
N244BJ RV-6 "victim of SNF tornado" 1200+ hrs, rebuilding
N8155F C150 flying
N7925P PA-24-250 Comanche, restoring
Not a thing I own is stock.
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01-17-2010, 05:47 AM
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Join Date: Jan 2007
Location: Stuart, FL /Hartford, CT/Virgin Gorda,BVI
Posts: 3,122
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alternator warranty?
andy, i have been using the 87 suzuki alt for 10 years. been thru a bunch of them. it had a life time warranty back then. what kind of warranty did you get on the new one?
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TURBO YES =VAF= Payed Jan2019
Ed D'Arcy
RV6-A 5,200+ hrs, R-44 1,600 hrs, Helicycle 320 hrs, gyro sold,35,000 miles flown in 2015 
Stuart, Fl / S WINDSOR,Ct / Virgin Gorda, BVI - under major repair from hurricane damage
VAF #840 EAA AOPA FAC FABA QB SPA
addicted pickle ball player
https://i.postimg.cc/tn3h4svg/IMG-3101.jpg
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01-17-2010, 06:03 AM
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Join Date: Sep 2007
Location: Albuquerque, NM
Posts: 659
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Lifetime as well, from Autozone. Do you recall what size bolts you used?
I was hoping to not have to modify the alternator. It would be nice to just be able to pick up a stock unit if I'm out somewhere and install it without having to modify it first.
__________________
Andy Compton, PhD EE
RV-10 - #41414 (building)
RV-9A - N643AC (built,flying,sold,missed)
My blood and sweat, the Wifey's tears
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01-17-2010, 11:10 AM
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Join Date: Jan 2007
Location: Stuart, FL /Hartford, CT/Virgin Gorda,BVI
Posts: 3,122
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alternator
i am out of the country now but dont recall a problem with bolt size. get the largest that will fit then crank em down. the metal insert in the alt bracket will help secure the alt when tightened. the right smallest size belt will keep the alt from hitting the cowl. turbo
__________________
TURBO YES =VAF= Payed Jan2019
Ed D'Arcy
RV6-A 5,200+ hrs, R-44 1,600 hrs, Helicycle 320 hrs, gyro sold,35,000 miles flown in 2015
Stuart, Fl / S WINDSOR,Ct / Virgin Gorda, BVI - under major repair from hurricane damage
VAF #840 EAA AOPA FAC FABA QB SPA
addicted pickle ball player
https://i.postimg.cc/tn3h4svg/IMG-3101.jpg
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