alystair
23.04.2021 15:30:45
This gas/oil ratio calculator can be used for determining the amount of oil needed for any gas/oil ratio required by the manufacturer's instructions for two-stroke engines.
See full version: Gas Oil Ratio Calculator
This gas/oil ratio calculator can be used for determining the amount of oil needed for any gas/oil ratio required by the manufacturer's instructions for two-stroke engines.
The Gas Oil Ratio Calculator employs the basic formulas below: here
((160 * UK Gallons) / Ratio) = UK Ounces of Oil [links]
For new two-stroke boat motors, there is usually a break-in time that requires a richer oil to gas mix, meaning you need to add more oil during the initial period of operation. The break-in specification is often a 25:1 ratio. Be sure to get the details from the dealer, the owner’s manual, or the manufacturer before you take the new motor out for the first time.
Using the same example of 35 litres of gas, here is the calculation using each method: here
35 X 2 = 70.0 so you need 700 ml of two-stroke engine oil to go with the 35 litres of gas. more
Here is a quick chart for a 50:1 ratio
Well thats great advice guys.I have heard that before about the johnsons and evinrudes.But like you said pappy it was from a lack of use that there was problems.That will never be a problem because my motor will never be in storage and the longest it will sit is a week if that.So basically i could do the 100:1 but you don't suggest it.Maybe i will just split it down the middle and do a 75:1 ratio to make sure there is more oil then they say to use,i know the reason they want less oil is for emission reasons to burn cleaner.The thing that gets me if yamaha knows this then why would they not change it to 50:1.Also how does more oil give you more power?Can you explain how that works? here
Post by Deadmeat » 06 May 2011, 07:06
I guess while i'm breaking it in i will do some more research on this debate.Maybe some more people will chime in who have run their motors on 100:1 with no problems.But very good advice so far.Thanks. here
I don't want to blow this motor up so any imput would be helpful on this ,thanks
Post by ILOVTOFISH » 06 May 2011, 12:50 more
I mentioned portability as an important issue. Notice the carrying handle on the back of the engine. That made it very easy to haul from the car to the dock. Once mounted on the transom, the motor tilts up out of the water with just one hand. My friend, Howard is a veteran who lost his right arm in a rocket attack. He tells me that his next motor will be a Yamaha F6. Shifting from neutral to forward or reverse is via a lever mounted on the side of the engine. here
The motor draws fuel from either an integral tank on the top of the engine, or from an external fuel tank and hose. You need to know a three-position petcock hides under the front of the engine. Flip it to choose: Off (no fuel), or either the the integral or external tank. I used the on engine tank a a fuel reserve.
Yamaha F6's significant weight savings comes at a price. The engine is noticeably louder than other four-strokes. Part of that is due to the exhaust flow that exits above the propeller. In other words, this is not a thru-the-prop-hub exhaust which is undeniably quieter. It's not loud, it's just that it's louder than an outboard with thru the hub exhaust. here
I personally unpacked this 6-hp small outboard motor from its shipping crate and prepped it. That meant adding engine oil to the empty crankcase (drained bone dry for shipping) and also making sure there was plenty of lubricant in the lower unit.
What attracted me most to this engine was its light weight. At a mere 60 pounds, it weighs 23 pounds less than the previous F6. So naturally it follows the new Yamaha F6 is significantly easier to wrangle onto and off of a dingy transom. Compared to a generic 9.9 horsepower engine the F6 weighs about 30 pounds less. Compared to a generic 6-horse it still weighs less. Yamaha engineers saved weight by founding this small outboard on a single-cylinder powerhead. The previous F6 had two-cylinders. I was pleased to see how smooth it runs thanks to a balanced crankshaft. more