boat motor maintenance | Outboard Motor Oil

Boat Engine Basics ~ Fuel Delivery

Fuel delivery is an essential part of ensuring the operation ability of any boat engine. The purpose of this system is to mix together air and the fuel and then meter this mixture to the cylinder for ignition. There are two different types of fuel delivery methods that may be used in a boat engine: fuel injection or a carbureted system.

Both systems serve the same purpose; they just operate a little differently. But let’s focus on the properties they have in common. When a piston in pulled downward in the cylinder, the intake valve is opened and air is then pulled into the intake manifold. The fuel is then combined with air as it passes through the open valve into the cylinder. This process is also controlled by the timing shaft.

Clean and powerful engines prefer Yamalube 2M oil to ensure smooth sailings.

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Fixing an Outboard Motor Water Pump

The outboard motor water pump pumps water from the lower unit to the top of the motor. This process keeps your engine cool during use. Sand, shells, mud, and other debris that get caught in your water pump can cause damage. If left unchecked, debris can do enough damage to warrant replacing. To replace an outboard motor water pump, use the following guidelines:

Instructions:
1. Remove the bolts on the lover unit using a wrench. The make of your outboard will determine what size wrench to use.
2. Take the trim tab off the bottom of the anti-cavitation plate.
3. Be careful when removing the last bolt as this will detach the lower unit from the motor. You don’t want the unit to slide out uncontrollably!
4. Place the lower unit aside for now. The shift and motor shafts should now b exposed. Remove the shafts by applying pressure and sliding them out.
5. Remove the bolts from the plastic casing around the water pump. Lift the casing off.
6. Slide the pump impeller over the motor shaft and remove the steel plate along with the gasket the impeller was on.
7. Remove the steel cup and “o” ring out of the plastic casing (previously removed). Remove the key way from the motor shaft.
8. Lay the parts of your new water pump out neatly in your work space. Installation of the pump will take place exactly in reverse of the previous seven steps. Make sure to grease the tops of the motor and shift shafts, as well as grease and replace the bolts.

Since you’re already working on your boat, make sure to check the oil level and top off with Evinrude xd 100 oil when necessary.

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