Johnson Outboard Lower Unit Oil Type [Update 2023] ❤️

The type of oil used in the Johnson Outboard Lower Unit is: Regarding What kind of bottom unit grease or oil should be used in johnson 70 outboard motors?

Going to your neighborhood dealer to get a bottle of Hi-Vis Gearcase Lube and the required amount of oil is something that I would recommend doing.

Make sure to buy new crush washers to put behind the screws that hold the vent and drain. They’re not expensive however they will have to be replaced every time they are removed.

What is Johnson Outboard Lower Unit Oil?

Lower unit oils are a lubricant that is utilized within the motor’s lower part. It assists in protecting the moving parts and gears against wear and tear and helps in dispersing heat. Johnson upper unit of the outboard is specially made for use with Johnson motors that are outboard.

Why is it Important to Use the Correct Oil in Your Lower Unit?

The use of the correct oil for the correct oil in your Johnson Outboard Lower Unit is essential for a number of reasons. 

The first is that making use of the wrong oil can result in increased damage to gears as well as other moving parts which can result in expensive repairs. 

Furthermore applying the wrong type of oil may result in overheating which can result in further damage. 

Additionally applying the incorrect type of oil may end your warranty, so it is essential to choose the correct oil in order to make sure that your warranty stays valid.

How to Choose the Right Johnson Outboard Lower Unit Oil

Selecting the best Johnson lower unit oil for your outboard isn’t easy however there are many things to think about:


The viscosity of an oil refers to the ease with which it flows. In general, it is best to choose an oil with the viscosity suggested by the manufacturer for your specific motor.

Type of Oil

Johnson’s upper unit of the outboard is available in two kinds of synthetic and mineral oil. Mineral oil is cheaper and suitable for most conditions. Synthetic oil is, however, more expensive, however, it offers better protection against extreme conditions.

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Synthetic vs Conventional

As we’ve mentioned Synthetic oils are more costly than a traditional oil, however, it gives better protection against extreme conditions. If you regularly operate the boat under extreme circumstances, for example, in saltwater or hot temperatures, you might want to think about the use of synthetic oils.


There are a variety of different brands of Johnson upper units for outboards that are available on the market. It’s essential to select a top-quality oil from a reliable brand.

How Often Should You Change the Lower Unit Oil?

The frequency with which you should change the lower unit oil in your Johnson outboard motor depends on several factors, including how often you use your boat and in what conditions. In general, it’s a good idea to change the lower unit oil at least once a year, even if you don’t use your boat very often.

How to Change Johnson Outboard Lower Unit Oil

Changing the lower unit’s oil within the lower unit of your Johnson outboard motor can be an easy task that can be completed at your home. What you’ll need complete:

Tools Needed

  • Johnson outboard lower unit oil
  • Oil drain pan
  • Hand pump or extractor of oil
  • Funnel
  • Set of sockets or wrenches
  • Clean cloths

Steps to Follow

  1. Begin by warming your outboard motor by running for a couple of minutes. This will help loosen up any dirt or other particles within the oil.
  2. Find the lower unit’s drain plug for oil at the lower part of the unit. Place the drain pan for oil beneath the plug.
  3. Take out the drain plug and let the oil be completely drained.
  4. After all the oil is gone Clean the drain plug with a clean rag. Then put it back in the unit below.
  5. Find the oil fill hole on the back from the unit’s lower side. Utilize either the pump hand or an oil extractor, to refill the unit with the suggested quantity of Johnson outboard lower unit oil. You may also employ a funnel to pour the oil into.
  6. After the lower unit is fully filled with oil, you can replace the fill hole with an oil plug and secure it.
  7. Lastly, clean the lower unit using the clean rag to eliminate any oil that has accumulated.

FAQ johnson outboard lower unit oil type

What kind of oil do you put in a Johnson outboard?

For older Johnson/Evinrude outboards (1962-72) with electric shift, you’ll need Premium Type C Lube. Changing the Lower Unit Oil The lower drain/fill plug screw is usually located on the starboard side of the lower unit, beneath the “bullet-shaped” portion of the lower unit housing.

Are Johnson/Evinrude lower units interchangeable?

It is true that Johnson / Evinrude lower units can be interchanged however, you can’t rely on visual comparison alone. I want to share with you two things in this blog:

What type of lower-unit Lube should I use on my Boat?

Your Owner’s Manual will recommend the manufacturer’s proprietary lower unit lube and that is always a safe choice.

We can recommend our West Marine and Pure Oceans brand Lower Unit lubes, which meet all engine manufacturer’s specifications and warranty requirements.

How do I change the lower unit oil on my motorhome?

Changing the lower unit oil. Snatch it away as the oil begins to slowly drip out. Then remove the upper vent plug screw, usually located above the cavitation plate on the starboard side of the lower unit, and the oil will gush rapidly out of the drain hole. Give the oil plenty of time to drain completely, ideally for an hour or more.

How To: Changing Your Outboard Motor Lower Unit Gear Oil

The BEST Outboard Lower Unit Oil

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Selecting the correct oil for the Johnson Outboard Lower Unit is a crucial choice that will be a major influence on the lifespan and performance that your engine. 

Considering factors such as operating conditions, the age of the motor, as well as manufacturer guidelines, you can select the right oil for your needs. You will get the best security and efficiency from the motor.

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