"Wendy, there are a number of
"Wendy, there are a number of things that need to be done to winterize your motor. I'm not sure how old "older" is though. Here's what I do for my 80's era motor.....
Treat the gas with 2+4 fuel conditioner. run the motor until you have been able to smell it in the exhaust for several minutes at a minimum. I run the whole last tank conditioned.
During you're last boat outing, pull the boat onto the trailer, and before you shut it off, spray storage fogging oil into the motor until it smokes profusely. Shut it off immediatly.
Take the boat home. Tilt the motor up and down a few times to get all the water out. Remove the propeller and grease the shaft. Look for fishing line around the shaft (it can cut the seal).
Find and grease all the zerks on the motor. One on each of the three cover latches. 2 on the tilt tube over the transom bracket. One on the port side of the trim carriage for the steering shaft (put lots in here). One under the carb on the shift linkage. Wipe the steering cable ram off and grease the part that goes through the tilt tube.
Pull both plugs and drain the gearcase. Look for water (milky oil), or metal chunks. Refill from the bottom hole with HPF-XR lube if it's not electric shift. If electric shift use Premium blend gear lube. Make sure the plug with the magnet goes in the bottom plug.
Disconnect the fuel line. Open up the fuel filter. Dump out the fuel and clean the filter. Loosen a plug in the bowl of each carb and let the gas drain out. You probably won't be able to catch it in a container, so stuff some paper towels in there to sop up as much as you can. If the motor is not VRO oil injected, you can run it out of gas and skip this step. It's not good to run a VRO engine out of gas though.
Pull each spark plug out and squirt some more fogging oil in each cylinder.
Go up under the dash of the boat. Pull the small tube off the speedometer. Blow through the tube to clear any water that might freeze in the tube. Leave the tube off so the speedometer can drain if it has moisture in it.
Pull the drain plug out of the boat. Tie it to the steering wheel or throttle so you won't forget to put it back in.
Clean out the boat, wash and wax the fiberglass. Vacuum things out nice. Unplug the fishfinder and bring it indoors. Wrap up the ropes nice. Top off the VRO oil tank to prevent condensation.
Dissasemble and grease the trailer wheel bearings. If more than a couple years old, consider replacing the bearings and races. A bearing failure on the road is no fun.
Trim the motor all the way down. Remove the battery from the boat. Put a battery maintainer on it for the winter to keep it from becoming discharged.
Cover the boat. If stored outside, you might want to consider moth balls and mouse poison. Rodents will really ruin your day.
All the supplies mentioned can be had an Evinrude/Johnson dealer. I usually use E/J parts, but Andy has good aftermarket supplies on this site."