I'm running a new to me 225 pro-max with the oiler still opperable. Wanting to run 40:1 mix. How much do I add per gal. to attain 40:1...Thanks. Fishing boat. 19'3 Gambler.
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I'm running a new to me 225 pro-max with the oiler still opperable. Wanting to run 40:1 mix. How much do I add per gal. to attain 40:1...Thanks. Fishing boat. 19'3 Gambler.
can't really say the output from the oil pump is varyable depending on speed my guess would be aprox. 1-2 oz per gallon on top of what the oil pump puts out if you troll alot less , hi speed go higher.
my 2 cents
jon b
40:1 ratio is 19.2 oz to 6 gallons. But as already stated the oiler varries depending on throttle position. If I remember correctly the oiler system idles at 100:1 and maxes out at 50:1.Quote:
Originally Posted by Deacon
So a pre mix added to a oiler system would have the ratio all over the map.
IMO I'd either stick with the stock set up for a fishing motor or get rid of the oiler system all together.
In my many years in the outboard business the biggest reSon folks are reluctant to remove automatic oilers and pre-mix has been the lack of confidence as to the ability to mix accurately.I applaud your decision to run 40:1 in your motor,but it can't be done with the help of the self-oiler.Also,even if you add a little oil to your fuel to complement the mixer,it won't be enough to keep you from sustaining damage when the mixer quits.Spend an hour and a few dollars and install the factory made block-off and dispense with 50 percent of the reasons we need to rebuild motors like yours,Chris
The math is for 50:1 ratio.............128/50= 2.56 ounces per gallon. 40:1 ratio is 128/40 = 3.2 ounce per gallon
3.2 - 2.56 = .64 ounce/gallon more is neede to make it 40:1
I have been adding .5 ounce per gallon now to my 225X in order to put it close to 40:1 ratio for a long time with no ill effect. I did this for a little extra insurance because I had the limiter raised a bit. Although my mix is not exactly 40:1, it is close. It's about 42:1.
Thanks for all the in-put guys. I guess I'll be taking the oiler off soon. Rex
While I agree with your math ratios. I totally agree with Chris on this one. You can never be at or close to 40:1 with an oiler system and pre mix combined. Again your ratio will be all over the map. The oiler system is not constant it varries from Idle to WOT.Quote:
Originally Posted by catfish123
If I'm wrong, I as always will stand corrected but I don't think so in this case.
If the oiler system operates at various ratios based on throttle position. How can you be at 40:!/42:1 constantly??
If you get rid of the oil inj, would think 50:1 mix would be fine unless revlimiter is removed an are running over 6500rpm.
Dave
I remove the VRO on EVERY 225/200 Pro Max I build ( except the X motor ) 3 got canned just this week..
Jay
To answer the question: Note the linkage arm position at WOT, remove the link between it and the throttle arm, fix the arm on the oiler so it doesn't move, and boom, straight ratio automatic oiling. Its not rocket science.
That said I would take it off, throw it in the garbage and install a blockoff plate.
Then, spend $4-5 on an oil-to-gas ratio bottle with all the different ratios printed out on the side, and voila!!!...Correct oil ratio becomes idiot proof.Quote:
Originally Posted by 1BadAction
yep. I just don't understand what the fascination with automatic oiling is.Quote:
Originally Posted by h2oskiier30
Yamaha started putting reliable oil injection on 2 stroke motorcycles in 1964.
To bad Mercury didn't !
Jay
Or use the metric system of measurement and it becomes idiot proof as well.Quote:
Originally Posted by h2oskiier30
Just about the only thing the metric system has going for it, if you had to convert from normal. Still have trouble relating metric to standard sometimes.Quote:
Originally Posted by Riverman
Dave
I boat 3 or 4 times a week.... This works great for me!Quote:
Originally Posted by h2oskiier30
1 gallon is 128 fluid oz.
Divide 125 by 50, you get 2.56, so a little over 2 1/2 os of oil in a gallon = 50 to 1
128 by 40, 3.2 oz of oil, = 40 to 1
128 by 32, 4 oz of oil, = 32 to 1.
When i was running a premix boat, 1970 Merc 135 in line, I used a baby bottle.
I went with 3 oz per gallon, to kept the math simple. The ratio was 42.667 to one.
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I use the bore size and stress levels to determine the oil ratio.
2.4 and 2.0 liters that are recreational turning less than 8000 I use 50:1 ( more than 8000 I use 40:1 )
ANY 3.500" bore ( 2.5 ) that turns less than 8000 Rpms I use 40:1 one that turns more than 8000 I mix at 32:1
Has worked great for me so far...
Jay
Yeah, and it was injected behind the carburetors, where it should be. Instant mixture change with throttle position. Could that be why my dad's 1965 YDS-3 has 50,000 miles on the original bore and pistons? But, sshhh....don't say the Japs did anything right or better. That would not be good to say that and is not allowable on this forum.Quote:
Originally Posted by Mark75H
We had several YDS-3's. Used them for everything, never a lick of trouble.
Sam,they oil injected because they had to.The whole country got around on 30-50 cc scooters,at least those who could afford them.The little motors had to be capable of idling in traffic stops and then
Running full speed,over and over,without fouling the weak magneto fired sparkplug.The oil injection kept the motors lubed without fouling.Don't give em too much credit,what they've got came from us... They have two natural resources...salt and rock,chris
Oil injection on a 1964 motorcycle came from the US? Can you give an example?
Sam,I wasn't speaking of the oil injection specifically ,just a general observation.It looks to me most of their outboard tech was borrowed from Omc.I don't know where oil injection began,but my dad brought a little car from Germany that looked a little like a streamlined VW bug,a DKW, it had a 3 cyl 2 stroke motor,with a gas tank and an oil tank.l was just a kid when we moved and it was left behind,1963-4?I don't know for sure but I think the Italians and Germans had it long ago,chris
That likely is the source of oil injection ... but ...I was pretty sure it wasn't "us" in the US ... I just wanted it clarified for other readers.Quote:
what they've got came from us
All the screaming 2 stroke bike technology was based on Walter Kaaden's work in East Germany's MZ motorcycle shop. A defector took it to Japan where they refined it.
What the Japanese lack in basic research, they make up for in refining other people's ideas. Its a cultural thing for them, they think its the right way.
I too have been adding 0.5 oz/gal for an estimated 1:42 ratio at max rpm. Adding 1 oz would give a ratio of ~1:36.
Quote:
Originally Posted by Chris Carson's Marine
Well for starters, the YDS models that Sam and I were referring to weren't scooters. Unless you want to use the word "scooter" to describe 250cc sport bikes that put Yamaha on the map by winning races.
Secondly, they didn't have magnetos. They were battery ignition.
There was one fault of the Autolube system - it didn't work while the clutch was pulled in at a stoplight. So it is true that the injection helped prevent fouled plugs from idling ;). Truthfully, the residual oil was plenty to get through a stoplight change and you could always kick it into neutral and let go of the clutch.
You forgot to mention one other resource the Japs have: BRAINS. Something severely lacking in this country since rampant marijuana use, eyebrow rings, and baggy pants became widely accepted.
Ron,sad but so true...
Damn, I may have to change my sig line :) :)Quote:
Originally Posted by Ron V
I will vouch for oil injection on my 87 2.4L Laser simply because I have a 60gal gas tank in the Scarab and trying to premix that with solid consistency after multiple refuels would get interesting. I could and would do it, but its officially my parents boat and if they happened to forget at some point, BOOM! There goes a brand new rebuilt powerhead. Not what I want, plus the hull is heavy and Ive never seen above 5800rpms, hopefully post-rebuilt I should be able to spin 6100-6200rpms if I want but will probably keep it around 6000. If I was trying to run race gas and really get the last drop of performance from the motor, first I wouldnt have it on the heavy Scarab hull (but sure makes rough water trips pleasant) and Id definitely remove oil injection and spin 7000+rpms.