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Post by aerologic on Oct 17, 2008 16:03:17 GMT -5
All,
I got my "new to me" RE-5 running. Since I had oil in the "cylinders" I dind't check the oil injector out yet. So as it was running I loosened the banjo coupling/check valve on the front of the carb. Jess had told me to do this to check oil weeping out. I got a fair flow of gasoline coming out when I loosened this. Does this sound normal???
Thanks!
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Post by tom93gts on Oct 18, 2008 11:42:12 GMT -5
There is fuel pressure pushing down from the fuel tank and then right out that banjo fitting. You really would need to remove the banjo bolt completely, holding fuel from flowing out the hole on the carb by plugging it with your finger then watching for oil to weep out the line.
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Post by aerologic on Oct 18, 2008 12:57:44 GMT -5
Thanks tom93gts,
I took the banjo fitting off and ran the engine with my finger blocking the hole on the carb where the fitting goes. Oil did come out of the small diameter hose. More as I gave it throttle.
The banjo fitting DOES operate as a 1 way valve. I was a little surprised on how much pressure from my mouth it took. It's more like I have to suck on the banjo side go get flow versus blowing on the other side. Does this sound right?? It's definitely 1 way. I'm soaking it in carb cleaner/gasoline for a while and will blow it out with compressed air. So I think I'm OK.
Thanks!
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Post by aerologic on Oct 18, 2008 13:42:24 GMT -5
With the banjo fitting back on the line, there is definitely less seepage when the engine is running. Is this expected??? I got a drop in a minute, maybe a little less than a minute...
Not that I'm going on any rides yet, but how long does the oil tank last? How many tanks of gas?
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Post by tom93gts on Oct 18, 2008 20:49:29 GMT -5
I haven't put enough miles on my RE5 to really know how long a tank lasts. I first got it on the road with about half a tank, then a hundred or 2 miles or so later the low oil light came on so I added a partial bottle I had laying around then later added another partial to top it off. Since then I didnt pay attention to my mileage so no clue. Wish I could be of value.
Also on the volume of oil to drip out, I need to look at the manual, but a drop a minute sounds low. There are instructions on this forum I think on how to measure oil usage by hooking up a container to the line into the metering oil pump so you keep oil pumping into the motor. Also you can pre-mix some oil into the gas tank to be safe. Thats a pain in the butt but probably worth doing until you detarmine the pump to pumping the proper amount.
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Post by aerologic on Oct 19, 2008 6:17:31 GMT -5
What's a good mix ratio??
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Post by tom93gts on Oct 19, 2008 9:37:32 GMT -5
Usually on Mazda rotary engines we do about an ounce per gallon if you don't have the oil metering pump. So to be safe thats what I would stick with until you determine it is indeed working.
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Post by aerologic on Oct 19, 2008 9:39:57 GMT -5
Do Mazda cars have a metering pump? I was wondering how they lubricated the apex seals. I would think emissions would be an issue.
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Post by tom93gts on Oct 20, 2008 10:00:54 GMT -5
They do, but the modern cars have injectors mounted into the rotor housing so the drop of oil comes out and gets swept away by the seal. Rotary engines burn so poorly any way that the tiny amount of oil there is negligible when it comes to emissions.
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Post by Jess on Oct 25, 2008 22:39:12 GMT -5
All rotary engines use oil...
That was part of the "education" that Mazda had to endure from the public...
People would go... my rotary uses oil... What's wrong?
Mazda: "Nothing..."
"Well something must be wrong... when my Chevy uses oil... it needs engine work"
Mazda: "This isn't a Chevy..."
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Post by aerologic on Oct 27, 2008 15:18:48 GMT -5
Should I see any smoke in the exhaust with an ounce of oil per gallon? I really don't see any as far as I can tell.
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Post by suzsmokeyallan on Oct 27, 2008 17:30:11 GMT -5
Well if your oil pump is working ( a general visual clue) once you start the bike you will see a visual amount of smoke coming out the exhaust pipes on cold start for about a minute.
The RE5 manual has a test for checking the oil consumption from the pump. Basically using a slender clear vial of around 3/4 diameter and about 8 inches long graduated in CCs ( a large syringe body works well for this ) Held vertically and connected to metering oil line from the oil tank and filled with oil.
Start up the engine and by referring to the the tach indication, raise the engine speed to 2000 rpm. Set the engine speed to this value by using the idle screw setting, then hold the oil pump control lever in the full open mark position, which is identified by match marks.
Under this condition see how much oil the pump discharges in six minutes by watching the oil in vial drop, the value should be 5.0cc plus or minus 0.5 cc, if the pumps working correctly.
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