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View Full Version : Starter bendix??????????????



Blown 472
06-25-2006, 01:07 PM
Answer me this, I have a top mount prestolite style starter that the roll pin fell out of yesterday so I need to replace that. But then bendix seems like it is out too far, how does it work, we took it apart and there is a plunger with a spring in the part that has the helical cut gear on it which is lugged to the nose with the gear on it.
So when it engages the flywheel does centrifugal force overcome the plunger and let the gear slide back down the helical part of it? or just how in the hell does this thing work?
Any one have any pics of an exploded on as well?

centerhill condor
06-25-2006, 01:33 PM
I saw some stuff on the prestolite.com website.... I think it is spring loaded and torque engages or causes the gear to slide toward the big gears.

Cheap Thrills
06-25-2006, 02:54 PM
If it's the type Im thinking it is. The plunger is drawn into the solenoid Via electromagnetic energy drawing the bendix into the flywheel. The spring returns the plunger to it's original posistion when the magnetic current is released.
C.T. :wink:

SmokinLowriderSS
06-25-2006, 04:48 PM
If you had only asked 24 hrs earlier. :cry:
About 4 hrs ago dropped the 454 back into the Taylor from all the winter work. It's used a top-mount reverse rotation, prestolite starter for 28 years, and I would have looked at it for ya, but it's hard to get to now.

Blown 472
06-25-2006, 06:13 PM
If you had only asked 24 hrs earlier. :cry:
About 4 hrs ago dropped the 454 back into the Taylor from all the winter work. It's used a top-mount reverse rotation, prestolite starter for 28 years, and I would have looked at it for ya, but it's hard to get to now.
day late and dollar short, story of my life :yuk:

Cheap Thrills
06-25-2006, 07:30 PM
Like this one ?
http://www.***boat.com/image_center/data/500/1127starter.JPG
1Terminal Nut
2Starter Solenoid
3Housing Seal Assembly
4Bushing Bearing
5Drive End Housing
6Solenoid Screw (2 Req'd)
7Starter Motor Assembly
8Drive Lever
9Drive Assembly
10Stop Ring Retainer
11Stop Ring
12Magnet Retainer (6 Req'd)
13Starter Frame
14Brush Assembly
15Spring
16 Bushing Bearing
17Brush End Plate
18Brush Plate Screw (2 Req'd)
19Through-Bolt (2 Req'd)
20Armature Assembly
21Armature Thrust Ball
22Planet Gear
23Stationary Gear Assembly
24Truarc E-Ring
25Magnet Pole Piece (6 Req'd)
26Pole Shunt (6 Req'd)
27Armature
28Shaft Assembly
29Gear Retainer
OR PICK ONE.
http://www.autozone.com/images/cds/gif/large/0900823d801d7061.gif
http://www.autozone.com/images/cds/gif/large/0900823d801d7062.gif
http://www.autozone.com/images/cds/gif/large/0900823d801d7063.gif
all of the above use magnetic energy to engage the bendix the last one uses kenetic energy.
The torque of the starter spins the bendix up a pitched shaft into the flywheel and the coil spring pulls it back away from the flywheel when the tourque is released.
http://www.autozone.com/images/cds/gif/large/0900823d801d7060.gif
C.T. :wink:

Blown 472
06-25-2006, 07:52 PM
It is like the last one, do they have any pics of the bendix drive exploded?

Cheap Thrills
06-25-2006, 08:04 PM
not that I have found yet I'll keep looking. Whats the problem with it ?
if it appears ok but won't turn the engine over chances are that the
"One Way Bearing" inside the bendix is shot it acts like a ratchet allowing the gear to spin freely in one direction and not the other. if it's bad it will just spin under tourque. unfortunately it is sealed inside the bendix I don't think it is serviceable and a replacement may be nessassary. They aren't that expensive if you can find sombody to source it.
If it's standard rotation Autozone carries them I dont know if they can source reverse rotation though.
C.T. :wink:

SmokinLowriderSS
06-26-2006, 02:54 AM
Yep, that last one is mine, fairly comon boat starter but pretty hard to get ahold of too. Pricey lil bahhhhstahhd. :cry: :cry: :cry:

80Dimarco
06-28-2006, 10:51 AM
Mine is like the first one and is a Delco Remy, what kind is that first one?
I need a new one I think, although the auto parts place tells me the starter is good after they tested it.. If it is I dont know wtf is going on lol

Cheap Thrills
06-28-2006, 03:40 PM
Mine is like the first one and is a Delco Remy, what kind is that first one?
I need a new one I think, although the auto parts place tells me the starter is good after they tested it.. If it is I dont know wtf is going on lol
Most autoparts stores just check that the solenoid is throwing the bendix forward and that it spins up. Rarely ever have I seen one that checks the bendix. alot of them are not solid and use a one way bearing in them that allow the gear to sipn one way and not the other kind of like a ratchet .
if that bearing is bad it will the shaft will spin inside the gear. I have seen it dozens of times. Replacing the bendix isn't difficult.
Check your flywheel for missing / worn teeth first.
C.T. :wink:

centerhill condor
06-28-2006, 04:51 PM
while you've got the starter apart it would also be easy and cheap to replace the bearing/bushing on the other end as well as the brushes. then you have the new starter!
Don't pull the pin until the brushes are in the motor.