Like any abnormal sound in the engine of a car arouses the attention of the driver, a marine engine requires the full attention of his boss to give his all. Servicing the engine of our pleasure boat helps us to know all the particulars of the ship and part of the duties of a good pattern. All captain knows his boat like the back of his hand. A reason for this in navegar.com we have been publishing some tips for boat maintenance and boat engine. In a previous post we saw the maintenance and change the water filter decanter. Now I play two key elements of any marine engine: oil lubrication and oil filter.
The choice of oil for the engine of our boat must not involve more difficulty in the manual of the machine to meet the manufacturer’s recommendation. In this respect it is not advisable to be brave. The voice of the manufacturer may or may not respond to subjective criteria regarding the brand, but always respond to technical criteria regarding the graduation of the oil.
The marine engine oil can be monogramed or multigame. The difference is that the monogramed oil has a very specific range of viscosity where the lubricant maintains its properties. Most commonly the multigame oil, based on the SAE (Society of Automotive Engineers), or Society of Automotive Engineers in the Spanish translation classification.
The viscosity of the lubricating oil of marine engines and influences their behavior is a function of temperature. A marked oil SAE 15W-40, means that it has a viscosity grade 40, which is not intended for use at 40 ° C. While the letter W indicates the viscosity at freezing temperatures.
How and when to change the oil
The oil change marine engine should meet the criteria of the engine manufacturer. However, the oil change must be forward when the engine runs at high speed for a long time and can be extended when normally navigate at low revs. Manufacturer criterion refers to a rate of operation next cruise ship.
To make the change engine oil must have a suction pump. The hose is provided that is inserted through the hole to house the dipstick level and proceed to emptying. All motors are advised that the machine has an average temperature for the fluid to flow more easily.
The extraction of oil used is the opportunity to examine the internal state of the engine. The presence of metallic waste is the alarm that parts that do not perform proper motion, being subjected to friction.
Note that the oil from the ship machine are subject to MARPOL regulations, and therefore must be deposited in the agreed locations, as discussed when talking about garbage and waste in the sea .
Changing the oil filter
Once emptied all, or almost, the lubricating oil it is time to proceed to change the oil filter. However, the filter change can alternate every two oil changes, provided a similar oil is used and have not appreciated metallic debris in dirty oil. The oil filter retains its panel’s metal splinters arising engine operation. To remove it is usually necessary to have an adjustable wrench to clamp the work piece diameter. Not so for the new place, it will be sufficient hand strength so that it is firmly in place.
The supply of oil filters for marine engines is broad. From block filters in which all elements are integrated into one piece, the filter cartridge where it is only necessary to change the removable cartridge.
The position of the filter in the engine is usually such that it allows full extract oil without causing the spill in the hold, which would result in the bottom cleaned. Also, this position allows the filter clean place full of new oil, avoiding gaps that may occur in the circuit.
It placed the filter, which is never to tighten with wrench for installation, proceed to complete the filling of the crankcase with new oil. Always having the caution that the level is between the minimum and maximum acceptable for the machine. Both excess and defect mechanical oil have dire consequences. The next step involves the launch engine for a few seconds, stop and check the oil level. It is preferable to rectify because we have fallen short, and we have passed.