How To Change Oil In 50 Hp Yamaha 4 Stroke

Engine Oil & Lube

You've heard the expression "choose wisely." When it comes to choosing an engine oil and filter to protect your Yamaha, this couldn't exist more truthful. Using the right oil and filter at the recommended intervals is the single most important thing you can do for your outboard.

Tin I alter my ain oil? Absolutely, but you don't have to. If you lot'd rather leave it to your Yamaha Marine dealer, they will be happy to take care of it for you in their specially trained and properly equipped service department. That likewise ways you won't have to dispose of the used oil yourself. But if y'all prefer to practise it yourself, your Yamaha Marine dealer tin can set yous up with a Genuine Yamalube Oil Change Kit, specific to your Yamaha outboard. Information technology includes the right blazon and corporeality of Yamalube marine oil, a Genuine Yamaha oil filter and a drain gasket. Everything you'll need to do the job right. Kits are available in Yamalube 4M 10W-30 and 20W-twoscore weights. Checking your oil level. The oil level bank check process for your Yamaha four-stroke outboard is a flake different than the procedure for your motorcar. It's like shooting fish in a barrel to get an accurate reading if you follow this procedure:

Start and warm the outboard to normal operating temperature, then shut it off. Stop the outboard.
Tilt engine up halfway and allow to rest for 5 minutes to thoroughly drain the oil back into your outboard'southward crankcase.
Trim the outboard back downwardly to level.

Tip: You can place a minor level on meridian of the anti-ventilation plate to assist you determine when to stop.

Pull the dipstick, wipe the oil from it, and re-insert it in the crankcase. So pull the stick again and check the oil level. This helps ensure proper venting for authentic indication.
At the proper oil level, the oil should be halfway up crosshatch pattern on the dipstick.

Tip: The elevation and bottom of the crosshatch pattern on the dipstick do not represent "high" and "low." The right oil level indication is at the mid-point of the pattern. Use caution when filling or calculation oil. Yamaha four-stroke outboards accept a tapered oil sump design (smaller at the superlative than the bottom), and then the closer the oil level is to full, the faster it fills. Therefore, add oil slowly and in minor amounts, and do not effort to "top off." Practise not allow the oil level to surpass the upper portion of the crosshatch pattern. Doing so may result in aeration of the oil, reducing lubricity and oil pressure, and may cause eventual engine damage.

What oil should I use?

Your Yamaha outboard is vastly different from your automotive engine; so avoid regular automotive engine oils. Use a motor oil specifically formulated for the rigors of the marine environment, like Yamalube^® 4M for four-stroke outboards, and Yamalube^® 2M for two-stroke outboards. Permit's look at a few reasons why:

Engine load. The typical loads placed on your outboard are much heavier than on your automobile, having to overcome a much greater amount of elevate to create functioning. This means your outboard is working much harder than your machine'south engine. Yamalube 4M and 2M marine engine oils contain specific anti-wear additives to account for this.
Engine speed. Your outboard operates at a much higher RPM than your automobile'due south engine. It must rev higher to create higher speeds, rather than just changing gears similar your car. That means your outboard may run all 24-hour interval long at 4500-6000 RPM, rather than the 2500 RPM your car reaches at highway speeds. That's tough on your oil, and can literally shear (or split) the molecules in ordinary automotive oil, reducing lubricity. Yamalube 4M and 2M have special shear-stable polymers to combat this and provide superior lubrication at all times.
Operating temperature. Outboards are cooled using raw water, which is frequently cool to very common cold. On the other hand, saltwater will begin to crystallize if its temperature is raised above 170° F, potentially causing blockage in the cooling passages and leading to engine overheat and possible damage. Considering of these two factors, your outboard operates full-time at a temperature much lower that your automobile, and requires very dissimilar qualities in its lubricating oil. Yamalube marine oils accept detergents, dispersants and viscosity index improvers to see these marine-specific challenges caput-on.
Operating environment. Your outboard is constantly near water, sucking in very humid air straight off the water's surface in order to operate. This humid air also gets inside combustion chambers through open valves when it'southward not in utilise. And in a saltwater environment, that air is even more corrosive. It's one of the harshest environments imaginable for an engine. Yamalube 4M and 2M are purposely formulated with special anti-corrosion agents to help combat and prevent the corrosive effects of this environment.

Yamalube outboard engine oils provide specific protection other oils don't, using a proprietary blend of marine-specific anti-wear additives, shear-stable polymers, corrosion inhibitors, detergents, dispersants and viscosity alphabetize improvers. In short, they're far superior to automotive engine oils in their strength of protection, durability and corrosion resistance. How do I choose the right oil?

Marine engine oils are so different in their requirements that special levels of certification exist: FC-Due west^® (4 stroke) and TC-W3^® (two stroke). These represent the minimum standards of the National Marine Manufacturer's Clan (NMMA®) for marine engines. With their high quality and advanced formulations, all Yamalube 4M and 2M oils see or surpass all of these requirements. Using Yamalube is best for your Yamaha outboard, but whatever oil you choose, make sure information technology is the correct blazon and viscosity and that it carries either the NMMA^® FC-W^® or TC-W3^® label.

What Yamalube oils are right for my outboard?

Yamalube 4M FC-W^® Reformulated to improve protect your investment from the harsh furnishings of cold starts, hours of trolling and high-load, high-speed operation, its special anti-corrosive additives are specially suited for the harsh marine environment.

5W-30 Total-Synthetic—great for high-functioning outboards like our V MAX SHO^® model
10W-30 Mineral Base (conventional)—ideal for all Yamaha outboards and environments
20W-twoscore Mineral Base of operations (conventional)—suited for large outboards in consistently warm climates

Tip: 20W-40 weight is not for apply in 4.2L V MAX SHO models.

Tip: Your Possessor'due south Manual is the all-time place to expect for your recommended viscosity.

Yamalube 2M TC-W3^® Yamaha-formulated and NMMA^®-approved, it provides outstanding protection for 2-stroke, h2o-cooled outboards, with its special blend of additives that help combat ring stick, corrosion, varnish and wear. It's a standard by which other two-stroke oils are judged.

Steve Pennaz discusses the importance of changing your oil & using Yamalube 4M/2M

Aren't all oil filters pretty much the aforementioned?

Outwardly, possibly. But it's what'south on the inside that counts well-nigh. Yamaha oil filters are manufactured specifically to protect Yamaha engines, using only the finest components and construction methods bachelor. This includes a special filter media and metal filter media bases (instead of paper-thin), to help them achieve a level of durability and filtration far superior than most "off-the-shelf" oil filters. From the quality of the materials used to their high-quality construction, they only outperform and out-protect nigh aftermarket alternatives.