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well at least you will have other benefits available for the other problem … 🙂
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You will love this engine, one of my all time favorites
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depending on your skill level you may want to redirect the purge valve fuel oil residues ( normally dummped out in the lake) back to the pressure tank via a modified purge valve cover and a couple of check valves .
They do consume a fair bit of fuel at 5-6$/gal being 2 strokes so anything you recover back to the fuel tank will improve on expenses and help clean up the lake 🙂
did you download yourself a copy of the Johnson service manual (red book) ??
Go to MEMBERS ONLY tab go to….
INNER SANCTUM go to …..
LIBRARY… go to….
Garry Spencer’S drop box
go down his list and find the red book…. download and print locally
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The required mix is 24:1 but you have to read the manual carefully as it says one quart of oil to a full tank of gas, which is six US gallons. That makes a 24:1 mix but further on the manual says ‘for ease of measurement’ to mix one half pint of oil with one gallon of gas, which is for smaller amounts. I’m assuming the company figured it was easier for the average Joe to measure out a half pint instead of one third of a pint of oil. This would allow for a bit of error on the users part to protect the motor in case in case they didn’t measure out enough oil.
Hello. I often wonder what it meant to a full tank of gas. Because you have 6 gallon tanks and the 5 1/2 and ten horse motors usually used a 4 gallon tank.
The required mix is 24:1 but you have to read the manual carefully as it says one quart of oil to a full tank of gas, which is six US gallons. That makes a 24:1 mix but further on the manual says ‘for ease of measurement’ to mix one half pint of oil with one gallon of gas, which is for smaller amounts. I’m assuming the company figured it was easier for the average Joe to measure out a half pint instead of one third of a pint of oil. This would allow for a bit of error on the users part to protect the motor in case in case they didn’t measure out enough oil.
Hello. I often wonder what it meant to a full tank of gas. Because you have 6 gallon tanks and the 5 1/2 and ten horse motors usually used a 4 gallon tank.
All my QD manuals and marineengine show a six gallon 375774 tank for the ten horse motors which is the same one used for the eighteens. The ’55 QD-16 parts manual also shows a straight foot valve in the tank while the foot valve in the small tanks was bent to fit. Seems like it was only the 5.5 and 7.5 horse motors which came with the small tank. Either way, a quart of oil in a full correct tank for a motor will give either a 16:1 or a 24:1 fuel mix. This only works for US gallons and not the old Imperial gallons.
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6 US gallons x 128 oz == 768 oz/ 24 ====> 32 oz of oil for 24/1 ratio
6 US gallons x 128 oz == 768 oz/ 16 ====> 48 oz of oil for 16/1 ratio
5 Imp. gal x 160 oz== 800 oz /24===> 33.3 oz of oil for 24/1 ratio
5 Imp. gal x 160 oz== 800 oz /16===> 50 oz of oil for 16/1 ratio
US quarts 32 oz Imp (CDN quarts 40 oz)
just go with liters 1L oil /25 l of gas ===> 25/1 1.5L oil /25 lof gas === >16/1 close enough 🙂
if I am not wrong !
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Not to hijack this thread, but I have been advised to use the new modern 2 cycle oil in my 57 big twin 35. I’ve used 2 cycle oils in the past and it did not run well with them. Once I finally learned to use the 3ow oil, she purred like a kitten. What gives?
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some regular 2 cycle oils are for air cooled engines like mowers and chain saws….. TCW3 is for water cooled engines maybe you used the wrong type ???
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Even if you aim for 24 to 1 you will likely run richer than that. Say you run a single 6 gal. tank. When the fuel level gets just below 1/4 of the tank if you are like me you will probably want to refill. So you put in one quart of oil. The tank will take around four and a half gallons of gas. One quart in four and a half gallons is 18 to 1. That works for me. 🙂
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TCW3, yep. That was the stuff I was told to use. Expensive. Too bad I already bought a case of 30 weight oil. I’m sure I was using the air cooled 2 cycle engine oil as I wouldn’t have known the difference. Lol. live and learn.
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