A boat's engine, like anything mechanical, needs regular maintenance to keep it in optimal running condition. Not practicing boat engine maintenance invites all sorts of expensive trouble or on-the-water emergencies. Reading your engine manual, you should make a handy boat engine maintenance checklist and post it where you will see it during boating season. While most boat engine maintenance items can be done at the start or end of the season, a few things must be checked regularly. Boat engine maintenance is very little trouble, but handling engine repairs caused by neglect is a major headache.

An essential part to replace regularly is the impeller, which is a rubber or plastic part that cools the motor by circulating lake water through it. The impeller will pick up impurities from the water and occasionally collect grit or dirt from being run aground. These cause deterioration, as does time spent in storage. An impeller is one piece you do not want to have fail-it could mean overheating and engine destruction. Therefore good boat engine maintenance calls for the impeller to be replaced every three or four years.

Before packing up your boat for the winter, you should do some maintenance on your boat engine. Since boats do not get as much action as automobiles normally get, their oil does not need to be replaced as often. It should, however, be changed at the end of the season. At the same time, fogging oil should be added. When the final tank of fuel for the season is pumped into your boat, it is wise to add fuel injector cleaner. Otherwise, the fuel can thicken and clog the motor. These are easy measures designed to prevent unpleasant surprises when the boat enters the water in the spring.

Reference your owner's guide for any boat maintenance particular to your boat. Remember, an ounce of prevention is worth a pound of cure. The last thing you want is to have to repair a costly engine part or to get caught adrift after your engine conks out. Good boat engine maintenance can keep your engine running properly for years.