4-Stroke Outboard Introduction

The Yamaha 4-stroke outboard is a motorized engine system for boats. It offers a light, faster and more powerful method of propelling boats and other small water crafts. Consuming less fuel than its counterparts, the two stroke, HPDI and VMAX SHO series; Yamaha’s 4-stroke outboards are powerful yet quiet, clean burning and reliable. They are perfect solutions for small fishing boats, sail boats and dinghies.

Oil requirements for a Yamaha 4-stroke outboard involve:

Yamaha 4-Stroke Outboard oil filterRegular Changing of the Oil and Oil Filter

Periodical changing of Oil for the Yamaha 4-stroke outboard must be carried out to maximize efficiency. The oil and filter should be changed after the first ten hours of operation and every 50 hours afterwards for optimal engine performance.

Oil removal is done using a suction oil pump. You may also a drill unit but ensure that it goes all the way down into the oil reservoir. The suction pump is vital because it tells you the exact quantity of oil taken out.

You can remove the oil filter by yourself or call a tech to do it. This is normally done using a combo cup adaptor.

Price of the Oil Product

Your 4-stroke outboard motor must always be given quality oil products. The quality of the oil depends on several factors. This includes the price of the oil, the viscosity of the oil and more importantly, the brand name and standardization of the oil.

Most off the shelf oil products may seem cheaper than their major company rivals. You may find it fit to rush for a good deal on oil but later regret it. Always use the brand of oil recommended in the outboard manual.

Quality of the Oil

Yamaha 4-Stroke OutboardThe Yamaha’s 4-stroke outboard normally has output range similar to high-performance automobile engines. However, it works in a more gruelling environment than vehicles. Marine propulsion involves high loads and extensive full throttle working conditions. This has to be done in humid and saline conditions where lubrication is paramount.

It is therefore essential that you acquire oil that can handle such an engine without fail. The quality of oil mostly depends on the formulation. Quality oil for outboards is made from polymers that can resist breakage even under extreme circumstances. Such oil has additives to protect the outboard motor from wear and tear caused by corrosion, rust and sand particles.

Quality oil is also thick and highly viscous. This quality enables the oil to cling to parts of the engine when running. Thin oil flows to the lowest parts of the engine instead of remaining on the rings and bearings of the engine. Some of this oil can get sucked by the bleed circuit and taken to the top crank bearing. When this happens, smoke is produced when the motor is started.

The National Marine Manufacturers Association (NMMA) created the FC-W rating as a performance standard for oil to be used in 4-stroke outboard engines. Any oil product you purchase must conform to this standard.