Mixing gas question - 2stroke outboard

[oneshot]

So.. the whole ratio thing boggles me at times. i'll get to the point..

I have roughly 2 to 3 gallons premixed gas in my 6 gallon tank right now. can i just add 3 more gallons and the 8oz of 2 cycle oil for that 3 gallons in there and shake and call it good? or will this mess up the ratios?

how do you do it?
do i need to premix the 3 gallons in another container before putting it in with the older premixed? or do i have to run the old premix all the way out before putting new gas in the 6gallon tank..

if this doesn't make sense.. well.. it doesn't to me either!!!!!

what do i do to add 3 more gallons into my 6 gallon tank that already has 2 to 3 gallons of mixed in it?

haha..

help...

[kzoo]

Just as long as you need the same ratio. Just monitor your fill up at the pump, get it at 3 gallons and put the oil needed, shake it.

[oneshot]

i mix 50/1, that's what i need.
i had 6 gallons mixed with 16oz at 50/1.. now i have about 2 to 3 gallons left of that or even less maybe..

so all i need to do is put in my 3 gallons in to 6 gallon tank and the 8oz i think it is of oil.. and shake? good to go?



i stress this stuff cuz i was good at blowing up my dirtbikes when i was younger..

[kzoo]

i mix 50/1, that's what i need.
i had 6 gallons mixed with 16oz at 50/1.. now i have about 2 to 3 gallons left of that or even less maybe..

so all i need to do is put in my 3 gallons in to 6 gallon tank and the 8oz i think it is of oil.. and shake? good to go?



i stress this stuff cuz i was good at blowing up my dirtbikes when i was younger..

That's what I do for my little outboard, never had issues. Just make sure you get as close as you can at the pump for 3 gallons, then just add the 8oz of oil.

Also, seems like everyone recommends fuel stabilizers for the gas, I put a shot in there when I'm adding oil.

[oneshot]

good tip on the stabilizer, i thought about that too, especially for these older outboards..

[BentRod]

i mix 50/1, that's what i need.
i had 6 gallons mixed with 16oz at 50/1.. now i have about 2 to 3 gallons left of that or even less maybe..

so all i need to do is put in my 3 gallons in to 6 gallon tank and the 8oz i think it is of oil.. and shake? good to go?

As long as you're doing your ratio calculations right , sounds like what I do. Doesn't hurt to throw some SeaFoam in with that gas either. Acts both as a stabilizer and helps keep the carb clean.

[oneshot]

yeah my calculations are what the oil bottle says for 50/1
when i put 6 gallons in i used 16oz and shook.. now i have some of that left and want to add 3 more gallons, i will add 3 gallons and put in the 8oz oil and shake again..

where you get that seafoam stuff? auto parts store?? i live in northgate.. wink wink. hahah..
how much should i put in with my gas?

[BentRod]

yeah my calculations are what the oil bottle says for 50/1
when i put 6 gallons in i used 16oz and shook.. now i have some of that left and want to add 3 more gallons, i will add 3 gallons and put in the 8oz oil and shake again..

where you get that seafoam stuff? auto parts store?? i live in northgate.. wink wink. hahah..
how much should i put in with my gas?

You can get SeaFoam from most auto parts and marine supply stores. I picked up a can from O'Reilly's here in Issaquah. Directions are on the can. Can't remember how many ounces per gallon. I usually just estimate with it.

[oneshot]

cool, thanks for all the replies guys!
I've had this questions on the gas for like a month, just haven't asked, i been carrying a 1 gallons premixed can with me a couple times out now. in case i ran out while on water. haha..

I have 2 snowmobiles, they have oilers.. put oil in that and it mixes as i go.. easy!!! ;)

[Jerry H]

Go to most any marine supply or outboard shop. They will have a plastic bottle that you can buy that is caliberated on the side (mix ratio, gallons of gas, amount of oil to use). Fill the gas tank. Check the pump for amount of gas you just put in, fill the bottle up to the appropriate mark with oil, pour in tank and vigerously shake and you are good to go. Never a dought that you have the correct mix. no matter how much or little gas you add.

[oneshot]

Go to most any marine supply or outboard shop. They will have a plastic bottle that you can buy that is caliberated on the side (mix ratio, gallons of gas, amount of oil to use). Fill the gas tank. Check the pump for amount of gas you just put in, fill the bottle up to the appropriate mark with oil, pour in tank and vigerously shake and you are good to go. Never a dought that you have the correct mix. no matter how much or little gas you add.

the questions was adding mix to existing mix.. i do know how to mix oil to gas. just was confused if i would screw up ratios by adding to existing mix..

i added 3 gallons gas oil mix today to my existing 2+ gallons of premix.. ran great up and down the duwi.

[Amx]

If the gas in the tank is 50 to 1, and the new gas is mixed 50 to 1 and added to the gas already in the tank, then all of it is still 50 to 1.

[Jerry H]

That is the purpose of the caliberated bottle. You are always sure you have put the correct amount of oil in to keep the ratio correct.

[renpeg]

Always should use gas stabilizer If your not using up the gas withing a week especially with the ethanol mixed in the gas.
The gas stabilizer will keep the water molecules from sticking together. thus easier to burn them off.
Ethanol mixed gas used green stabilizer
Non-ethanol use the red stabilizer.

As for oil gas mixture. I have a few buddies that work on small engines for a living. they all recommend about a 40-1 mixture. Your going to smoke a lil more and might have to clean or replace the plugs a lil more often. But in the long run your protecting and lubing your 2 stroke a lot better. makes it last longer. Also they recommend high octane fuel which will help burn the extra oil but also stores better than low octane fuel. (I know alot of high end chainsaw also recommend this.)



Heres and easy chart
http://www.google.com/imgres?q=2+stroke ... x=26&ty=50


Have fun and stay safe!!

[oneshot]

If the gas in the tank is 50 to 1, and the new gas is mixed 50 to 1 and added to the gas already in the tank, then all of it is still 50 to 1.

i like this answer...

[Mike Carey]

Always should use gas stabilizer If your not using up the gas withing a week especially with the ethanol mixed in the gas.
The gas stabilizer will keep the water molecules from sticking together. thus easier to burn them off.
Ethanol mixed gas used green stabilizer
Non-ethanol use the red stabilizer.

As for oil gas mixture. I have a few buddies that work on small engines for a living. they all recommend about a 40-1 mixture. Your going to smoke a lil more and might have to clean or replace the plugs a lil more often. But in the long run your protecting and lubing your 2 stroke a lot better. makes it last longer. Also they recommend high octane fuel which will help burn the extra oil but also stores better than low octane fuel. (I know alot of high end chainsaw also recommend this.)



Heres and easy chart
http://www.google.com/imgres?q=2+stroke ... x=26&ty=50


Have fun and stay safe!!

good tips, thanks. I need to do some of these recomendations...

[hewesfisher]

Always should use gas stabilizer If your not using up the gas withing a week especially with the ethanol mixed in the gas.

That's right - always.

As for oil gas mixture. I have a few buddies that work on small engines for a living. they all recommend about a 40-1 mixture. Your going to smoke a lil more and might have to clean or replace the plugs a lil more often. But in the long run your protecting and lubing your 2 stroke a lot better. makes it last longer. Also they recommend high octane fuel which will help burn the extra oil but also stores better than low octane fuel. (I know alot of high end chainsaw also recommend this.)

This might be good advice for air cooled engines, but it is bad advice for water cooled engines. All 2-strokes are not created equal, and lumping them all together with generic recommendations for fuel and oil mix is wrong.

Do not use premium fuel in your water cooled 2-stroke boat motor unless it was designed to run on it. Higher octane fuels burn slower and cooler, that's why they're used in high compression engines. Slower and cooler burn rates in low compression 2-stroke engines results in a loss of performance, increased carbon build up, and more expensive exhaust. You gain nothing by using higher octane fuel and may very well add to problems. Spend the money you save by using proper octane fuel on a good fuel stabilizer, fresh plugs and an impeller at the recommended interval.

Always use good quality marine 2-stroke oil (I prefer motor mfr brand) for your engine. Always use fresh fuel in the proper octane rating when mixing. Use the ratio provided by the engine maker, they have already determined the correct ratio for long life and proper lubrication for your 2-stroke motor.

I get my facts from a 36yr dual certified Mercury Marine Master mechanic who knows a whole lot more about boat motors than a couple guys playing with lawnmowers and chain saws.

[Bodofish]

Always should use gas stabilizer If your not using up the gas withing a week especially with the ethanol mixed in the gas.

That's right - always.

As for oil gas mixture. I have a few buddies that work on small engines for a living. they all recommend about a 40-1 mixture. Your going to smoke a lil more and might have to clean or replace the plugs a lil more often. But in the long run your protecting and lubing your 2 stroke a lot better. makes it last longer. Also they recommend high octane fuel which will help burn the extra oil but also stores better than low octane fuel. (I know alot of high end chainsaw also recommend this.)

This might be good advice for air cooled engines, but it is bad advice for water cooled engines. All 2-strokes are not created equal, and lumping them all together with generic recommendations for fuel and oil mix is wrong.

Do not use premium fuel in your water cooled 2-stroke boat motor unless it was designed to run on it. Higher octane fuels burn slower and cooler, that's why they're used in high compression engines. Slower and cooler burn rates in low compression 2-stroke engines results in a loss of performance, increased carbon build up, and more expensive exhaust. You gain nothing by using higher octane fuel and may very well add to problems. Spend the money you save by using proper octane fuel on a good fuel stabilizer, fresh plugs and an impeller at the recommended interval.

Always use good quality marine 2-stroke oil (I prefer motor mfr brand) for your engine. Always use fresh fuel in the proper octane rating when mixing. Use the ratio provided by the engine maker, they have already determined the correct ratio for long life and proper lubrication for your 2-stroke motor.

I get my facts from a 36yr dual certified Mercury Marine Master mechanic who knows a whole lot more about boat motors than a couple guys playing with lawnmowers and chain saws.

X2 Big difference in air and water cooled engines.

[Idstud]

Thats how I would mix my gas as well(add the gas then the oil) if you know your going to get 3 gals in it add the oil then the gas. I gas up close to home so the drive will help mix up the gas. Im not a fan of more than 50:1 cuz I dont like the chance of fowling a plug while out. A little over 1-2 oz is better then not enought. Always put in Marine stabal for the ethanal prob there are some service stations that dont have ethanal. I use the Marine stabal in all my rigs,mowers,trucks ext. I know of one in everett west side of broadway near 21st accross from the old jerrys syrplus. One in snohomish near the Do it center I think its a 76 heading towards hwy 2 its the last light by the do it center before you cross the pil. Hope this is helpful. Engines do have a min octane rating.

From Wikipedia, the free encyclopedia
Octane rating or octane number is a standard measure of the performance of a motor or aviation fuel. The higher the octane number, the more compression the fuel can withstand before detonating. In broad terms, fuels with a higher octane rating are used in high-compression engines that generally have higher performance. In contrast, fuels with low octane numbers (but high cetane numbers) are ideal for diesel engines. Use of gasolines with low octane numbers may lead to the problem of engine knocking.[1]

[goodtimesfishing]

I always use that calibrated bottle....no figuring to do, look on bottle for how much gas you added ....fill oil to that line. never any guessing, oh and also, always use marine stabil, it will save a lot of headaches.