Will this work for my 03 mercury 50 hp outboard?

This switch worked perfectly on my 2004 Tracker Bass Buggy pontoon with 50hp Mercury 2-stroke...it was actually the only one I could find that was an exact replacement for it. Don't listen to the ones saying that it will not. IT WAS AN EXACT REPLACEMENT.

I have an johnson 88 spl that didnt come with any ignition switches will this one work?

Yes it sure will .. Follow ignition wiring instructions and you got goin on...

The switch made a very audible squealing noise when we turned key to on, any idea where we went wrong?

That's an interesting one, was the noise from the switch, or from the engine or accessories. I would suggest that you check all your connections according to the wiring diagram, and then maybe try it again, after disconnecting all accessories.

Does it come with any sort of diagram? I need to replace 6 wire switch with push to choke in boat with 75 Merc.

I do not remember a diagram in the package and you will have to make one yourself based on which wire is connected to which terminal on your existing switch. On mine, a couple of the terminals were in a different location on the new switch. Both switches should have a B or BAT (battery) terminal, an M for Magneto, A for accessory, a C for choke, and an S for Start. You want to match each wire from you existing switch to the same letter on the new switch.

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Description

⚡ Ignite your marine journey with effortless power and style!

CORROSION RESISTANT BUILD - Engineered for marine environments to withstand saltwater exposure and extend switch lifespan.
ROBUST 20 A POWER HANDLING - Delivers reliable 12V operation with a durable stainless steel contact for peak performance.
READY TO USE WITH DUAL KEYS - Comes with two precision keys for immediate installation and secure operation.
STREAMLINED IGNITION CONTROL - Push-to-choke feature removes the hassle of a separate choke switch for seamless starts.
UNIVERSAL MARINE COMPATIBILITY - Designed to fit most Johnson/Evinrude and OMC inboard/outboard engines—one switch, endless adventures.

The Seachoice Ignition Starter Switch (model 50-11651) is a high-performance, corrosion-resistant ignition switch designed for most Johnson/Evinrude and OMC inboard/outboard engines. Featuring a convenient push-to-choke function, it operates at 20 amps and 12 volts, includes two keys, and ensures reliable starts in demanding marine conditions.

Specifications

Operation Mode	ON-OFF
Current Rating	20 Amps
Operating Voltage	12 Volts
Contact Type	Normally Open
Connector Type	Marine
Brand	SEACHOICE
Terminal	Marine
Item dimensions L x W x H	3.75 x 1.5 x 7 inches
Circuit Type	3-way
Actuator Type	Hinge Lever
Contact Material	Stainless Steel
International Protection Rating	IP00
Number of Positions	3
Lower Temperature Rating	30 Degrees Celsius
Upper Temperature Rating	12 Degrees Celsius
Control Method	Touch
Connectivity Protocol	X-10
Wattage	240 watts
Unit Count	1.0 Count
Number of Items	1
Global Trade Identification Number	00719249116518
Manufacturer	Seachoice
UPC	719249116518
Item Package Dimensions L x W x H	6.97 x 3.66 x 1.54 inches
Package Weight	0.08 Kilograms
Item Dimensions LxWxH	3.75 x 1.5 x 7 inches
Brand Name	SEACHOICE
Warranty Description	http://www.seachoice.com/warranty-information
Model Name	11651
Suggested Users	Gender Neutral
Part Number	50-11651
Included Components	Johnson/Evinrude 3 Position Ignition Starter Switch
Size	One Size
Fishing Technique	Spinning

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