Need some info on the oil gas mixture for my little putt putt motor. Will be takin the boat out soon and due to not finding the buried treasure, I'll have to use the ol suzuk. I had a some gas left over from who knows how long when I bought the boat last year. Its gone and now it's time to use some real stuff.. Thanx in advance for any info or links to some tom b..
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Maybe Not !!
I have a 8hp Suzuki 2 stroke made during the energy crisis that takes 100:1 mixture. Might want to check with them, you don't want to foul your plugs by using the wrong mixture!
I have a 8hp Suzuki 2 stroke made during the energy crisis that takes 100:1 mixture. Might want to check with them, you don't want to foul your plugs by using the wrong mixture!
Guy's, every two stroke is,
oil dependent for it's ratio. That means you should buy the best oil and premix to that oils' ability to protect. The exception is oil injected two strokes (like my Yamaha). Those are set so lean that you have no choice, but to buy the best or not use the engine, unless you want to ruin it.
oil dependent for it's ratio. That means you should buy the best oil and premix to that oils' ability to protect. The exception is oil injected two strokes (like my Yamaha). Those are set so lean that you have no choice, but to buy the best or not use the engine, unless you want to ruin it.
TCW3 is current standard, some are better
Off brand oils are cheaper, knowledable 2 stroke mechanic advised that any major brand is okay, best to use manufacturers oil if possible (Quicksliver for Merc, etc.) He feels no problem using Johnson oil in Merc & vice- versa or mixing. Problem he has seen most often and is most evident in tanks for oil-injected 2 stokes is non OEM oils jelling when mixed with other oils. Engines used to be 40:1 then pretty universally went to 50:1. Injected engines vary the mix dependent on RPM's. Higher mixes for idle and may lean to as lttle as 100:1 at WOT. Too much oil fouls plugs, too little and things start to seize.
Off brand oils are cheaper, knowledable 2 stroke mechanic advised that any major brand is okay, best to use manufacturers oil if possible (Quicksliver for Merc, etc.) He feels no problem using Johnson oil in Merc & vice- versa or mixing. Problem he has seen most often and is most evident in tanks for oil-injected 2 stokes is non OEM oils jelling when mixed with other oils. Engines used to be 40:1 then pretty universally went to 50:1. Injected engines vary the mix dependent on RPM's. Higher mixes for idle and may lean to as lttle as 100:1 at WOT. Too much oil fouls plugs, too little and things start to seize.
Here's one for you.
In 1969 I rode my Suzuki 500 (motorcycle)from Puget Sound to the Mexican border and BACK on less than the two quarts of oil in the separate injector tank. If you poured the oil that was used by the engine, on the road as you traveled, could you even see it? And that was a '68! P.S. Ted, I think the mix ratio of injected engines is the other way around. The pump meters more oil at WOT. That's when the highest load occurs so the engine needs the most oil.(lowest numerical ratio)
In 1969 I rode my Suzuki 500 (motorcycle)from Puget Sound to the Mexican border and BACK on less than the two quarts of oil in the separate injector tank. If you poured the oil that was used by the engine, on the road as you traveled, could you even see it? And that was a '68! P.S. Ted, I think the mix ratio of injected engines is the other way around. The pump meters more oil at WOT. That's when the highest load occurs so the engine needs the most oil.(lowest numerical ratio)
I had a Suzuki 4HP
back in the mid-80's that was also a 100:1 mixture. It was a sweet running motor and very reliable. You might still check with your local dealer.
back in the mid-80's that was also a 100:1 mixture. It was a sweet running motor and very reliable. You might still check with your local dealer.
50:1
Hi Tom - I have the same outboard which I use occasionally on my sailing dinghy. I use 50:1. Have fun! Trevor
Hi Tom - I have the same outboard which I use occasionally on my sailing dinghy. I use 50:1. Have fun! Trevor
Too Much Oil Can be a Problem
To much oil can be a problem, but not for the reason most people think of. Too much oil can foul the plugs, but it can also make the engine run too hot. The oil displaces the gasoline. The net result is that the engine runs leans. At least, I remember reading this somewhere. Probably 50:1 or 40:1 is OK.
To much oil can be a problem, but not for the reason most people think of. Too much oil can foul the plugs, but it can also make the engine run too hot. The oil displaces the gasoline. The net result is that the engine runs leans. At least, I remember reading this somewhere. Probably 50:1 or 40:1 is OK.
Dan, never heard of that effect,
That's a good one for Hot Rod Magazine. It could then burn the valves too, huh?
Psst, Joke. Don't flame me.
That's a good one for Hot Rod Magazine. It could then burn the valves too, huh?
Psst, Joke. Don't flame me.Will not try to Defend the Idea
Since I am not sure I believe it either, I will not try to defend the concept that more oil can result in the engine running more lean, but I can remember some of the argument. Going to back and reading that first sentence, I think I could become a Kerry speach writer. The concept of mixing oil with gasoline is very complicated. Gasoline is extremely volatile, that is, it evaporates and becomes a gas and the excess gasoline provides cooling. The oil does not completely evaporate and therefore there is no latent heat of vaporization, and therefore little cooling. If it did, it would not provide lubrication.
Since I am not sure I believe it either, I will not try to defend the concept that more oil can result in the engine running more lean, but I can remember some of the argument. Going to back and reading that first sentence, I think I could become a Kerry speach writer. The concept of mixing oil with gasoline is very complicated. Gasoline is extremely volatile, that is, it evaporates and becomes a gas and the excess gasoline provides cooling. The oil does not completely evaporate and therefore there is no latent heat of vaporization, and therefore little cooling. If it did, it would not provide lubrication.
The Bottom Line is:
Use the mixture/ratio that the mfgr. suggests for your engine. It is usually stated on a sticker on the cover. If not, call the dealer/mfgr.... they will know for sure! It will depend on the year that it left the factory regardless of the horsepower. Too much oil will foul, too little will do more damage. Just check to be sure!
Use the mixture/ratio that the mfgr. suggests for your engine. It is usually stated on a sticker on the cover. If not, call the dealer/mfgr.... they will know for sure! It will depend on the year that it left the factory regardless of the horsepower. Too much oil will foul, too little will do more damage. Just check to be sure!
Dan, sorry, that's not true.
The internal combustion two stroke engine mainly cares about film strength. That is what protects moving parts. Oil has to provide protection for a plethora of demands though. Those demands are best met by the best made oil for the engine type, at the ratio the oil is certified to protect. The plugs will be happy too. Every engine ever made when 50:1 oil was the best and only 'good' oil available, will be happy as a clam with 100:1 oil. (mixed at 100:1)
The internal combustion two stroke engine mainly cares about film strength. That is what protects moving parts. Oil has to provide protection for a plethora of demands though. Those demands are best met by the best made oil for the engine type, at the ratio the oil is certified to protect. The plugs will be happy too. Every engine ever made when 50:1 oil was the best and only 'good' oil available, will be happy as a clam with 100:1 oil. (mixed at 100:1)
Fred, now I am really confused!
Are what you are saying is that it doesn't make any difference as to the mixture? Why then are there different ratios on the oil bottle? I am not trying to be argumentative, I just must not understand! Would not 100:1 be half as much oil as 50:1 ? Help me out here, please?
Are what you are saying is that it doesn't make any difference as to the mixture? Why then are there different ratios on the oil bottle? I am not trying to be argumentative, I just must not understand! Would not 100:1 be half as much oil as 50:1 ? Help me out here, please?
Yes it would, mix 50:1 even motors labeled
100:1 will have less wear and last longer. Tom s/v GAIA
100:1 will have less wear and last longer. Tom s/v GAIA
OK, come on, were is the logic of that (wear)?
At what point would you then say "I have achieved perfection, all wear has stopped"? I've never bought oil in containers that give ratios to mix too. At least not since I can remember. 100:1 oil is just that. If it gives lesser ratios, it's a 'lawyer label' or they are pandering to folks with old stuff. You know, use more, buy more. But that's just a guess, never seen 'em. This is not complex. When 50:1 oil came out, that was what was recommended by most manufacturers. Now 100:1 is here. Use it at that ratio. It's good stuff. Hell, I've got a chain saw that originally used 16:1. Remember in the early 60s when people would pour STP down the CARBURETOR and smoke out the neighborhood? Now THAT was an urban myth. One thing I'm not using here. It's the acronym 'IMHO'. This is not my opinion. It's everything I've read from people in the performance industry for the last forty some years. That ratio in my motorcycle was tapered to close to 1000:1 when idling. (that's one thousand:1)
At what point would you then say "I have achieved perfection, all wear has stopped"? I've never bought oil in containers that give ratios to mix too. At least not since I can remember. 100:1 oil is just that. If it gives lesser ratios, it's a 'lawyer label' or they are pandering to folks with old stuff. You know, use more, buy more. But that's just a guess, never seen 'em. This is not complex. When 50:1 oil came out, that was what was recommended by most manufacturers. Now 100:1 is here. Use it at that ratio. It's good stuff. Hell, I've got a chain saw that originally used 16:1. Remember in the early 60s when people would pour STP down the CARBURETOR and smoke out the neighborhood? Now THAT was an urban myth. One thing I'm not using here. It's the acronym 'IMHO'. This is not my opinion. It's everything I've read from people in the performance industry for the last forty some years. That ratio in my motorcycle was tapered to close to 1000:1 when idling. (that's one thousand:1)
Break In Period
Last time I got a Brand New outboard, '94 88hp SPL Johnson I recall that I used double ratio for break-in period per manufacturers instructions. Lot more smoke on startup but otherwise no diff. Great engine by the way, it's a de-tuned 114 that will idle all day or run WOT happily. Fred, I really can't remember what I've read about oil injectors but my thinking was that at high speeds more fuel is running thru cylinder and lower mix would then provide adequate lube to cylinder walls. I think you are probably correct, you will need lot more lube at WOT. BTW I'm still using oil in the runabout that I got several years ago, haven't bought any lately. Am I correct that you are saying new oils are formulated for 100:1 and that older 50:1 engines should use that ratio with the new oils ? I figured they would just start making soybean based oil or something, I'm being legislated off a lot of lakes here in the west cause to get rid of jetski's they are outlawing 2 strokes "for the sake of the environment".
Last time I got a Brand New outboard, '94 88hp SPL Johnson I recall that I used double ratio for break-in period per manufacturers instructions. Lot more smoke on startup but otherwise no diff. Great engine by the way, it's a de-tuned 114 that will idle all day or run WOT happily. Fred, I really can't remember what I've read about oil injectors but my thinking was that at high speeds more fuel is running thru cylinder and lower mix would then provide adequate lube to cylinder walls. I think you are probably correct, you will need lot more lube at WOT. BTW I'm still using oil in the runabout that I got several years ago, haven't bought any lately. Am I correct that you are saying new oils are formulated for 100:1 and that older 50:1 engines should use that ratio with the new oils ? I figured they would just start making soybean based oil or something, I'm being legislated off a lot of lakes here in the west cause to get rid of jetski's they are outlawing 2 strokes "for the sake of the environment".
Just purchased a Tohatsu 2 cycle
The information I was given was double the oil for the first 2 tank fills. So, for my 3 1/2hp Tohatsu it is 25:1 for the first 2 tank fills and then 50:1. Ted, the oil is brand new and I was not instructed to go to 100:1, FWIW Regards, -Jim- s/v Forever
The information I was given was double the oil for the first 2 tank fills. So, for my 3 1/2hp Tohatsu it is 25:1 for the first 2 tank fills and then 50:1. Ted, the oil is brand new and I was not instructed to go to 100:1, FWIW Regards, -Jim- s/v Forever
50
Oh for crying out loud. 50:1. Add a little more oil and it'll keep the mosquitoes and no-seeums down.
Oh for crying out loud. 50:1. Add a little more oil and it'll keep the mosquitoes and no-seeums down.
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