RE: Europa-List: Starter Diode

[Bud Yerly <budyerly@msn.com>]

Dave,

I didn't see anyone commented on your diode.


Pretty much any diode will do.  If you get it backwards, the saving grace i
s the start solenoid is looking for 12 volts.  Of course, the solenoid must
 be grounded.

Most mistakes are the ground is left off the solenoid when putting on the d
iode.  Another problem is guys don=92t insulate the anode side of the diode
 and it shorts.


The Rotax manual doesn't comment on the diode.  But it is an accepted pract
ice to extend the life of the contacts in the starter solenoid.  The Europa
 Electrical Chapter  25 advises to use an IN5404 but any will do.


IN5404[cid:image001.png@01D75B0E.9AC39E20]
silicone diode is shown above.  Anode or plus side is on the starter switch
 tab and the cathode or negative goes to the ground bolt holding on the sta
rter solenoid.  I use at least a #18 or 16 wire from the solenoid fastening
 bolt to the main firewall ground.


Best Regards,

Bud Yerly


-----Original Message-----
From: owner-europa-list-server@matronics.com <owner-europa-list-server@matr
onics.com> On Behalf Of david park
Sent: Wednesday, June 02, 2021 2:44 PM
Subject: Europa-List: Starter Diode


748@me.com>>


I fitted a starter Diode and engine would not start. Orientation was as des
cribed with band end cathode on starter terminal and other end to earth?

Have I got wrong diode.

Any advice appreciated


Dave Park G-LDVO


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