darkside
30.04.2021 0:30:30
Any Johnson outboard motor built since 1964 requires a 50/1 fuel ratio. Motors built prior to that date require a 32/1 ratio, with the exception of a few fishing motors built prior to 1955 that use a 16/1 ratio.
See full version: What Is the Fuel Mixture for a Johnson Outboard Motor
Any Johnson outboard motor built since 1964 requires a 50/1 fuel ratio. Motors built prior to that date require a 32/1 ratio, with the exception of a few fishing motors built prior to 1955 that use a 16/1 ratio.
Johnson outboard motors are two-cycle engines. These engines use a fuel and oil mix to provide lubrication. The crankcase serves as a pressurization chamber that forces the fuel mix past the piston rings into the ignition chamber. This provides the fuel that the spark plug ignites, and leaves a thin film of lubricating oil on the cylinder walls. Operating with a fuel-to-oil ratio that is too high causes premature wear on the parts due to a lack of lubrication.
We mixed 25:1 for old 70hp evenrude motor ran ok. On trailer reved alright and ideld ok but on water motor kept dieing and cutting out when starting to load power up could this problem just be too much oil mix here
Outboard Spares Response
Hi, If I owned one of these engines I'd be running 50:1 with a decent TCW3 2 stroke engine oil designed for pre-mix. If you're doing a lot of idling and slow trolling you could reduce the ratio a bit if you found you are fouling plugs but honestly I think 50:1 should be fine. Cheers [links]
Are you able to use the same oil as for aircooled engines such as chainsaws etc [links]
25:1 - Mix 200ml of oil per 5ltrs of fuel. This mixture is very rich and is usually recommended for running in brand new two stroke outboards and when running in rebuilt or reconditioned engines. If you have a rebuilt or reconditioned oil injected two stroke outboard (excluding Evinrude ETEC or Mercury Optimax) then you'll just need to add 50:1 to your fuel and let the oil injection system add the rest of the oil to make up the balance to get to 25:1. Most technicians will have their own opinion or view on how long you should run the 25:1 ratio for but, I always recommend between 8 and 10 hours. Unfortunately, you will foul plugs at this ratio and leave a very impressive smoke plume on engine start up but, outboards that have been rebuilt or reconditioned need this extra oil while the piston rings bed into the bores.
50:1 - Mix 100ml of oil per 5ltrs of fuel. Recommended by Mercury, Mariner, Tohatsu, Johnson and Evinrude this is my preferred ratio for all outboards including Yamaha and Suzuki. You can confidently use this ratio for any horse power and just about all year models. Whilst this ratio might see spark plugs fouling with extended use at lower RPM (such as trolling), in my opinion, it provides the best amount of lubrication for your outboard.
Now, what to run these at may be a separate discussion. I’ve read the oil ratio notes under the FAQ section and it seems I should just run a modern oil at the original mixture and let ’em smoke. more
Hello everyone, I haven’t been around much but having recently celebrated my daughters wedding I can now pay more attention to other things!
1930 Johnson K-50 8
1935 Champion Model A 1.5
1936 Johnson K-80 9.3
1938 Champion D2D 4.4
1946 Champion Blue Ribbon 1J 4.2
1947 Martin 60 7.2
1947 Evinrude Sport Twin 4416 2
1953 Johnson TN-25 5
1953 Firestone 7.5
1955 Evinrude Aquasonic? 25
1956 Mercury Mark 25E 20
1957 Johnson JW-13 3
1957 Mercury Mark 30 Turbo 4 30
1983 Evinrude 15
1930 Johnson K-50 8
1935 Champion Model A 15—–1/2 pint SAE 30
1936 Johnson K-80 9.3—–1 pint SAE 40
1938 Champion D2D 4.4—–3/4 pint SAE 30
1946 Champion Blue Ribbon 1J 4.2—–3/4 pint SAE 30
1947 Martin 60 7.2—–3/4 pint SAE 40
1947 Evinrude Sport Twin 4416 2
1953 Johnson TN-25 5
1953 Firestone 7.5—–1/2 pint SAE 30
1955 Evinrude Aquasonic? 25
1956 Mercury Mark 25E 20
1957 Johnson JW-13 3
1957 Mercury Mark 30 Turbo 4 30
1983 Evinrude 15 here
The ratio of oil to gas for most two-stroke outboards under most conditions is 1 part oil to 50 parts gasoline. Planning is either the hardest part or the easiest part of this because, if you go boating, you not only have to carry along enough gas to get where you're going, you also have to pack enough oil for the motor. more
The Best 2 Stroke Outboard Oil 2021 Pennzoil Premium Plus 2 Stroke Marine Oil. Pennzoil is a popular 2 stroke oil brand in the boating community for good reason. . Royal Purple 01311 2 Stroke Outboard Motor Oil. . Quicksilver 2 Stroke Oil. . Yamalube 2 Stroke Oil (LUB-2STRK-M1-04) Yamalube is the 2 stroke outboard oil produced by Yamaha themselves that meets the TC-W3 specification.
Outboard Motor Fuel Mix: Oil to Gasoline RatioThe Golden Ratio. The ratio of oil to gas for most two-stroke outboards under most conditions is 1 part oil to 50 parts gasoline.Fuel Mixing 101. Mixing the two-stroke oil with the gasoline before pouring it into the tank is by far the simplest method of lubrication for two-stroke outboards.Fuel Pre-Mixing. One gallon of gas is 128 oz. . Gas Before Oil. .
Johnson Outboards was a US based manufacturer of outboard motors. The original company to make Johnson inboard motors and outboard motors was the Johnson Brothers Motor Company of Terre Haute, Indiana, United States. here