I have a 1978 115 hp Evenrude that hasent been started in 7 years.What needs to be done to it before I try to start it?

https://goneoutdoors.com/specifications-johnson-outboard-115tl-7592998.html and google for free service manuals

BRP Evinrude Installation Manual

Here you'll find anything you need for a good installation.

Hi Jason, I'm an Aussie living in Sydney Australia and like most countries the year your car was made should be on your registration paper like mine mate, Just wondering if it's the same with a boat..........CHEERS..

an overheated engine will soften the rings so that the compression fails and may have damaged the reed valves that facilitate the compression
if it is a 4 stroke then there could be piston damage as well
If you do not have a workshop manual or are not mechanically conversant with engine repair then I recommend that you take it to an evenrude service dealer for diagnosis and repairs as there is a safety issue here

need to drop the lower unit(prop and all) to acess the chamber for the impeller.. give the impeller a small coating of grease so its not dry when starting up..

The model number tells us the year

Seems like it's a model from 1960. You should be able to order the manual from here: http://www.marineengine.com/parts/johnson-evinrude-manuals.php?Year=1960&HP=5.5&Model=5520
or here: http://www.iboats.com/Evinrude-5-5-hp-Outboard-Manuals-1960-1964/dm/cart_id.037585859--session_id.787640194--view_id.438986

If it is like my Evenrude 4hp 'light twin' the answer is no. These motors are nick named 'pull and go'. Before you start the motor besure to get the boat pointed in the direction you want to go.

first drain the gas out and put fresh in (hopefully the fuel hasent turned to varnish), it wont hurt to change the fuel filter, get a new battery, change the oil, check all the other fluids.

once you've done all that try to start it