Boating | Outboard Motor Oil - Part 13

Outboard Engines vs. Air-Cooled Engines, Part 1

Two-cycle oil needs to be added to gasoline for both two-stroke outboard engines and air-cooled two-stroke engines. There are notable differences between the oil specifications for the two applications. Let’s start by examining the differences between outboard and air-cooled two-stroke engines:

Outboard engines operate at constant speeds. Two-stroke outboard engines also operate in water, meaning they have a constant supply of coolant which is not re-circulated. Air-cooled engines, on the other hand, are used in spurts; turned on and off or left idling. These engines typically have smaller displacements than outboard engines, and are frequently overloaded. For , Mercury 2 stroke oil is recommended.

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Checking for Compression

Air, fuel, compression, and spark are the four main elements that keep a two-stroke engine running. If any one of the four elements is missing or damaged, then the engine will not go. A loss of compression can be caused by several reasons, but the most likely culprit is a faulty seal between cylinder, piston or piston rings. Fortunately, this is an easy problem to spot and fix.

Start by removing all of the spark plugs from the motor and ground those spark plugs against the engine case. Take a compression tester and screw it into the spark plug hole of the first cylinder to be tested. Twist the throttle and kick the motor over a few times. Check the tester’s gauge; if the gauge reads at least 100-125 then you’re good to go, at least on that particular cylinder. While you’re poking around the insides of your motor, consider replacing your Mercury 2 cycle oil.

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Yamalube 2W Specs

Yamaha’s Yamalube 2W oil reduces deterioration of two-stroke engine parts. It does so by lubricating the moving components within the engine. This keeps the motor clean and cool.

Yamalube 2W oil further inhibits corrosion and rust from developing inside the engine. The oil further prevents pistons from burning, rings from sticking, and spark plugs from fouling. It should be noted that the Yamalube 2W oil is meant to be used for personal watercraft engines and not for outboard motors or land vehicles.

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Specs for Yamaha Outboard 50 TLR

The is a mid-range motor for small to medium boats. It features a three-cylinder, two-stroke motor. Both the bore and the stroke are 2.6 inches, respectively. Overall, the motor weights 189 pounds.

The outboard motor runs on gasoline, minimum octane of 87. As far as lubrication, the 50 TLR has a gear ratio of 1.85; therefore, Yamalube 2M oil is recommended. The motor can hold approximately 1.6 quarts of oil. Performance-wise, the 50 TLR produces 50 horsepower at 5,000 rpm.

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How 2 Cycle Oil Works

Two-cycle engines have different requirements than four-cycle engines found in cars and lawn tractors. Oil and regular unleaded gasoline is blended together to create an enriched mixture that does more than just fuel an engine. For instance, two-cycle oil lubricates the engine while providing fuel.

When the mixture moves into the crankcase it pushes the piston up, creating a spark. Then, the spark ignites the fuel which sends the piston downwards. Thus, the power behind the two-cycle engine is created. A typical ration of oil to gas is 40 parts gasoline to one part oil or 50 parts gasoline to one part oil. Yamalube 2 cycle oil comes highly recommended.

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Checking Yamaha Outboard Oil Levels

All owners of Yamaha outboards should learn how to check oil. Depending on the tachometer your engine uses, the oil level indicator could be digital or analog. Look to see if all three blocks (digital) or all three lights (analog) are glowing green. This indicates that there is plenty of oil in the main and reserve tanks.

If you see a yellow light, then you need to add more Yamaha outboard oil. On yellow, your engine oil tank may be full, but chances are your reserve is empty. You don’t ever want your tachometer to flash red; that indicates a fill-up is needed immediately. To ward off accidents, make sure to bring extra oil on long excursions.

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Spotlight On: Bryan Thrift

Since 2004 angler Bryan Thrift has finished 75 fishing events. He has earned $839,706, according to FLW Outdoors, and has won five tournaments. He has had 24 top10 tournament finishes with his largest bass weighed to win the Big Bass award clocking in at six pounds, nine ounces.

Perhaps Thrift’s proudest fishing accomplishment is winning the 2010 FLW Tour Angler of the Year. His boat is a Ranger and his motor is from Yamaha. No doubt, he likely keeps his motor in tip top shape with Yamalube oil.

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Spotlight On: Robert Boyd

Robert Boyd has proven that he is one of the top anglers in the Southeast United States. Just this past February, Boyd caught 15 Guntersville Lake bass that totaled 66 pounds, 3 ounces which made him the winner of an EverStart Series Southeast Division fishing tournament. It was Boyd’s first win in the EverStart series and he earned $35,000 and a new bass boat for his efforts.

The prize bass boat was a 198VX Ranger boat with a 200-horsepower Evinrude or mercury outboard motor. Evinrude engines tend to be a popular choice among pro anglers. Whether you’re a professional angler or a recreational fisherman, make sure to use high quality Evinrude XD 5 oil.

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Operation Kid Float

Memorial Day is a deadly holiday for drivers and boaters, particularly in Florida where people flock to the beaches to soak up the sun. The Pinellas County Sheriff’s Office Marine Unit patrolled the waters, pulling over boaters to make sure all safety gear was in order. To help keep kids safe, the Sheriff’s Office instituted “Operation Kid Float.”

Children without life jackets were given life jackets to borrow for the day, to be returned to a bucket drop off on shore. Additionally, kids who were found to be wearing their life jackets properly were rewarded with t-shirts. The t-shirts read “I got caught wearing my life jacket by a Pinellas County Deputy Sherriff.” What a positive approach to boat safety! To do your part, inspect your boat thoroughly to make sure you’re in compliance with all safety regulations, and be sure to stock up on Evinrude XD50 oil.

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Keeping the Water Safe

Memorial Day weekend has come and gone. Now we are fully into the summer season. Not surprisingly, boating accidents jump during the summer months. Officers were out in full force on the water this past weekend to keep boaters safe.

For instance, in Pinellas County, Florida, 45 boating accidents were reported last year. That’s down from 51 in 2008, but it still ranks pretty high statewide. To combat this statistic, officers inspected boats and passed out life jackets for people to borrow. Kids who wore their life vests were rewarded for following the rules. Part of water safety is making sure your boat is in good condition, so make sure to use Evinrude XD100 oil before heading out on the water.

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Wear and Tear of Trolling

For catching big-game fish like tuna and marlin, there’s nothing quite like trolling. Inshore species like bluefish, kingfish, and jacks, are also caught by trolling. Freshwater anglers use trolling to pick up muskie, walleye, black bass, and striped bass.

, though effective, can be taxing on your motorboat. To keep your boat running smoothly, you’ll want to use Yamalube 2M oil. The Yamalube brand has been proven to withstand the wear and tear of trolling and other activities that put a strain on a boat’s engine.

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Memorial Day Weekend Checklist

Memorial Day, though a somber holiday in some respects, is also the unofficial start to the summer season. The three-day weekend at the end of May allows families to flock to pools, beaches, lakes, and rivers for some fun in the sun. Memorial Day weekend is chock full of barbecues and summer kick-off parties.

On the water, boaters are eager to show off their motorboats and jet skis. Everyone just seems to be in a good mood, waving to other boats as they cruise by. To ensure a good time is had by all, make sure to go through your inspection checklist, including refilling with Evinrude XD50 oil. Make sure you have plenty of life vests and that your first aid kits have been restocked. Lots of food, drinks, sunscreen, and friends are also a must for a successful party.

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