Product Datasheet
MARINE IGNITION SWITCHES
M-489
M-550
M-850
Specifications Overview
Voltage:
6-36 V DC
Amperage:
15A Ignition
5A Start
Positions:
2 or 3 Positions
10A/12V DC
Ignition Run:
Terminals:
2 or 3 Screw
Terminal Material:
Mounting Stem:
Nickel-Plated Silver
M-489: Fits panels up to 1”
thick with 1” hole
M-550: Fits panels up to 1”
thick with 1” hole
M-850: Fits panels up to 7/8"
thick with 7/8" hole
Description
Impact-resistant body cannot rust or corrode. Ignition switch
operates like traditional switches: the ‘Run’ position actuates
radio, radar, blower, lights, and other accessories. Fits most
OEM applications.
Cross Reference
Fits many boats: Baja, Celebrity, Chapparal, ChrisCraft,
Crestliner, Crownline, Four Winns, Larson, Luhrs, Mariah,
Powerquest, Rinker, S2 Yacts, Silverton Yacht, Thompson,
Thunderbird (Formula), Wellcraft.
Features and Benefits
Suitable replacement for:
General/Marine Works 3976, 4107
Sierra 18-1803, 18-1802
Pollak 33-105
Johnson 393301
Evinrude 508180
• Replaces many boat ignition switches.
Fits into standard 7/8” or 1” hole.
• For added security, switches have individual key codes.
Compare with other products in which one key fits every
switch of the same model.
• Corrosion-resistant nickel-plated silver screw terminals
have high electrical conductivity. Screw terminals give
more reliable connections that are less likely to loosen due
to vibration.
Mercury 87-17009AZ, 87-88107
Web Resources
Download technical resources at:
littelfuse.com/marineignitionswitches
Ordering Information
BULK
M-489
M-550
M-850
BOXED
M-489-BX
M-550-BX
M-850-BX
RETAIL
M-489-BP
M-550-BP
M-850-BP
Description
Installs in panels up to 1” thick. 12V DC, Ignition 5A, Start 5A, 2 Positions
Installs in panels up to 1” thick. 12V DC, Ignition 5A, Start 5A, 3 Positions
Installs in panels up to 7/8” thick. 12V DC, Ignition 5A, Start 5A, 3 Positions
Visit Littelfuse.com for the most up-to-date product information. Littelfuse products are designed for specific applications and should not be used for any purpose (including, without limitation, automotive
applications) not expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in
applicable Littelfuse product documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable
Littelfuse product documentation.
Datasheet Replaces Hotfeed Number D-583
littelfuse.com
© 2019 Littelfuse Commercial Vehicle Products
Rev: 021119