Starting Mercury Outboard after 20+ years
I have an old mercury 4hp 1977 GNAT outboard that has been sitting in our garage for 20+ years without any use. The outboard was drained of fuel when left and I have checked the plugs which appear to be in good condition.
I was planning to:
- add a couple of drops of TCW3 oil into each cylinder
- Change the gear oil
- replace the water impeller
Is there anything else I should do before starting the engine?
Also is all gear oil the same? (the manual quotes quicksilver 92-13783A24 which seems to be hard to find.)
Thanks for any help