Problem with Mercury Outboards - Zinc For Merc Od& What pins on the ignition switch are energized when when you turn the key on a 2003 mercury 15 hp 4 stroke outboard? I am trying to start a 2003 mercury 15 hp 4 stroke outboard motor to make sure it runs before i buy it. The problem is there is no ignition switch. I know what wires go where, I just don't know what pins get power when the key is turned.
Red is Battery +
Red/purple is ignition
Yellow/red is startermotor
Black/yellow is motor kill
Black is ground
To have ignition, black/yellow wire must be disconnected
On is red/purple on bat+
To start Yellow/red on batt+
To kill: black/yellow on ground
SOURCE: impeller replacing on 1999 merc. 25hp 2 stroke
Should not be that hard. Tape up the ends so you can hold it with out getting cut, (if its ragged or sharp from damage). should be one nut holding the impeller on. If its to tight to hold try air or electric Impact wrench. If its bad you can tap with a hammer to help in removing the old one. If it turned on the shaft you will need to rent a puller. Repost if you need more help.
SOURCE: 1993 40 HP 4 cyl. Mercury outboard: Running along
I solved it with no help from the professional assistant team. Thanks for no help till I send money...DON'T THINK SO!!! Thanks for wasting my time.
SOURCE: Free wiring diagram for 1978 Mercury Outboard 115 HP boat motor
I have a maintainance manual for this engine (I have the same one) with pages of wiring diagrams. What specific system/area are you interested in, I could scan in the page(s) and email them to you.
Mark
SOURCE: Re-assembling lower unit of 40HP Mercury 4 stroke
I found a lower gear case assembly diagram at http://www.crowleymarine.com/mercury_parts/6995/240.cfm which helped me understand how the shift mechanism works. This clued me in to the fact that I was missing the cam follower rod which I then found I had inadvertently mopped up in a shop towel when cleaning up spilled gear oil. After that discovery, assembly and operation was quick and successful.
SOURCE: I have a 1993 2 stroke 40 hp mercury outboard
Use it .It is a common thing with 2 strokes.Outboards have water in them and cool down quicker than say a 2 stroke motorbike. They have no water and keep the heat in the engine longer.If it runs well,,don't spend the money.All the choke does is gives the motor a slightly richer air/fuel mix at startup.It cannot hurt the motor.Hope this helps
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