Removing rotor/pully covering stator on Merc 470

bucnon75

Seaman Apprentice
Joined
Dec 24, 2009
Messages
30
Hope everyone is having a great Memorial Day. To veterans and their families, and especially to the ones who gave all- thank you.

1987_Merc 165, 3.7L
Just wanted to pass on some info for anyone upgrading to an alternator conversion kit and wanting to remove their stator located inside of the front pulley/rotor. Mercury says you need 2 special tools (only available from them) to do this, but that's not true. Here's what I did:

1) borrowed a harmonic balancer puller kit (#27019) from Autozone;
2) removed center bolt from pulley rotating CCW, using a 3/4" socket;
3) attached puller turning CW on the center bolt of the puller to remove pulley;
4) disconnected voltage regulator wire from stator, used 3/8" allen wrench to remove bolts from stator, used screw driver to knock-out magnets inside of stator (half of mine were disintegrated);
5) applied grease to inside of hole of pulley, lined up pulley to crankshaft, and used a block of wood centered on the hole and a hammer to tap the pulley far enough on the shaft to get the center bolt (from #2) started and ratcheted in the rest of the way.

I plan on removing the voltage regulator, which has an input and output cooling water hose connected to it. I reckon I'll just run a straight hose in place of it. This site is awesome and everyone is so helpful.
 

Attachments

  • puller.jpg
    puller.jpg
    120.9 KB · Views: 14
  • stator and removed pulley.jpg
    stator and removed pulley.jpg
    118.1 KB · Views: 12

wnbklb

Cadet
Joined
Aug 17, 2009
Messages
18
Re: Removing rotor/pully covering stator on Merc 470

I have the exact same motor on my '87 Wellcraft and also plan on converting my charging system. This guide you posted to doing this w/o the Mercruiser puller is great! I imagine it's not mandatory to remove the alt. rotor/harmonic balancer/stator? I realize that it's probably better to get the stator & magnets out of there. I'm not at my boat now, but does the existing alt. rotor/harmonic balancer (that you pulled) have the groove in it for a belt? Also, was space (fitting the new configuration under the motor housing) an issue? Finally, what kit did you use? I've found several sellers of both 1- and 3-wire alternator conversion kits and am just wondering. Thanks so much for your info and for sharing your pics and ideas. Nelson
 

zbnutcase

Commander
Joined
Sep 19, 2009
Messages
2,055
Re: Removing rotor/pully covering stator on Merc 470

I much prefer the 3 wire alt as it can sense system voltage.
 
Top