Wiring diagram for mercury blueband 50 hp 1981 outboard

[Richsuelaw]

Hi all, been looking over old forums for a while now but haven't found what I'm after.
I have removed internal wiring loom on outboard & I've been stupid in not marking where all the wires connect.
Really could do with a wiring diagram that shows what goes where, seem many online but none that match my engine exactly.
I think I have all cables in their right positions except the orange coloured cable, don't want the try to start engine without a final check using the correct diagram
Can anyone supply me with any help, pls
Engine serial number is 533-5316, think the year is 1981

 

[carholme]

Re: Wiring diagram for mercury blueband 50 hp 1981 outboard

Yes it is a 1981:

50 50 Classic 4-cyl 5531630 5949385 1981 USA

From here:

Mercury 2-takt, 4-cyl, 40 - 85 hp, produktions?r, modellguide

Parts List:

45/50 H.P. - Mercury, Mercruiser, Force, etc. Parts Lookup

Service Manual P/N: 90-86135--5

Mercury Mariner Outboard Service Manual 45 50 60 70 P N 90 86135 5 | eBay

In the interim, here is a link to the condensed version of the Clymer manual to get you started. Download it soonest to your computer as the link is short lived.

Small Engine Repair Reference Center Home: MERCURY - MERCURY FOUR-CYLINDER MODELS (1969-1989).

By s/n, yours should be the Thunderbolt without a distributor as seen in Fig. M12-58 on page 284.

Gerry

 

[Laddies]

Re: Wiring diagram for mercury blueband 50 hp 1981 outboard

If your serial number is 5335316 it's a 1979 and here's a wiring diagram

 

[carholme]

Re: Wiring diagram for mercury blueband 50 hp 1981 outboard

My apologies.

50 500/50 4-cyl 5193259 5531629 1979 USA

Parts List:

http://www.crowleymarine.com/mercury-outboard/474.cfm

The service manual and condensed service manual info is correct.



Gerry

 

[Richsuelaw]

Re: Wiring diagram for mercury blueband 50 hp 1981 outboard

If your serial number is 5335316 it's a 1979 and here's a wiring diagram

Thanks for the copy of wiring dia.
Dont suppose you have any idea where the mercury switch is located on the engine, i.e. any links to actual picture/images of connections

 

[Laddies]

Re: Wiring diagram for mercury blueband 50 hp 1981 outboard

Starboard side of the front cowl support