I found out that the NAPA chain of auto parts stores offered a marine parts catalog and to my surprise, they had a lot of the marine parts I needed were in stock at the local NAPA Distribution Center. Another auto parts store CarQuest has their "Sierra Marine Parts Catalog" which is the same thing with the same part numbers that NAPA uses. Finding out what parts are needed was a challenge, but once I knew what I needed, NAPA was able to get the parts quickly. You also want to find a good marine parts OMC Johnson/Evinrude and Mercury marine parts dealer. I do not like to buy stuff at the boat dealer and pay their high retail prices, but there are some marine parts you can only get there. There are several places on the web, but you need to be sure you know that what you are buying is actually what you need. The problem with these dealers is that they are orientated toward selling parts for a wide range of motors.
Shop around by clicking on the sites listed to the left. Search for the OMC Part Numbers and compare prices.
Listed below are the parts used to tune up my 1963 3 HP Evinrude Lightwin Outboard Boat Motor. There is a good chance that these are the same marine parts you will need for your motor, but you should verify the part numbers for your outboard motor.
Total Cost for Parts: $96.62 plus Tax at NAPA
Coils (you need 2 of these) OMC Part Number 582995 or 584477, NAPA/Sierra Part Number 18-5181
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Ignition Tune-Up Kit OMC Part Number 172522 NAPA/Sierra Part Number 18-5006
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Spark Plugs Champion J6C
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Carb Kit OMC Part Number 382045 or 382046 NAPA/Sierra Part Number 18-7043
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Impeller OMC Part Number 434424 NAPA/Sierra Part Number 18-3001
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Head Gasket OMC Part Number 203130 NAPA Part Number 18-3841-1
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