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Post by harleyracer59 on Oct 8, 2019 13:18:47 GMT -5
I don't have any experiences with the pump plug. im still running oil injection on all my 2strokes that have oil pumps.
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goodkat
Scoot Enthusiast
Posts: 178
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Post by goodkat on Oct 8, 2019 14:49:16 GMT -5
Reason 1: I have a tendency of simplifying the things. Or at least...I'm trying...not always with success. Reason 2: I see the oil pump as a device prone to fail. Besides this, that split cable sucks big time. I don't like it at all. Reason 3: I like clean things  No more hoses and that ugly oil tank. Reason 4: I'm probably a bit crazy 😁 |
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goodkat
Scoot Enthusiast
Posts: 178
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Post by goodkat on Oct 14, 2019 1:45:59 GMT -5
Some updates: 1. Removed the oil pump, hoses, and oil tank. Now it looks much cleaner. I'm waiting for a piece of aluminum billet so I can put it on a lathe and make a plug for it. Can't wait to finish it.  2. Removed the side covers again and cleaned them squeaky clean. Someone who worked previously lost the spring / safety on the worm drive, ordered a new one. Besides this, I found a weird thing on the half-moon gear. There is a weld bead near the end of the tooth gears. I don't know if this is normal, and if it's not, why the ex owner did this. Opinions?  upload image3. I don't want to sound stupid but my gues is that the fuel / oil lines were not plugged as they should be plugged in the carburetor ports. Considering the picture below, the oil / fuel hoses were plugged like this: 1-Oil line, 2-Fuel line, 3-Vacuum Fuel line. Was this correct? I thought the oil line should be plugged in the intake manifold. Opinions?  |
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goodkat
Scoot Enthusiast
Posts: 178
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Post by goodkat on Oct 15, 2019 8:50:45 GMT -5
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Post by oldgeek on Oct 15, 2019 8:57:52 GMT -5
The weld on the half moon gear is normal, it is a stop. The fuel/oil/vacuum lines were properly connected. Make sure to plug the unused oil fitting on the carb with something.
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goodkat
Scoot Enthusiast
Posts: 178
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Post by goodkat on Oct 15, 2019 15:39:40 GMT -5
The weld on the half moon gear is normal, it is a stop. The fuel/oil/vacuum lines were properly connected. Make sure to plug the unused oil fitting on the carb with something. Thank you so much! This answers to some of my questions. By the way, did anyone replaced the vacuum petcock with a gravity fed one? |
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Post by harleyracer59 on Oct 15, 2019 16:18:51 GMT -5
1 is a float bowl vent. leave it open 2 is your fuel inlet. hose runs from tank to carb. 3 is your oil injection line. hose goes from oil pump to it. block off cause you are going premix.
don't forget the case vacuum line in front of engine. next to oil pump, under exhaust flange.
I think you said your tank is under seat and above carb level. you can run a manual open/close/reserve petcock. only problem is its not easily accessible with fairings on. which means you have to leave it on reserve the whole time, which keeps gas in float bowl all the time which makes carb jets and float needle more susceptible to malfunctions and gunk build up.
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Post by oldgeek on Oct 15, 2019 16:33:07 GMT -5
1 is a float bowl vent. leave it open 2 is your fuel inlet. hose runs from tank to carb. 3 is your oil injection line. hose goes from oil pump to it. block off cause you are going premix. don't forget the case vacuum line in front of engine. next to oil pump, under exhaust flange. I stand corrected! The port labeled #1 is definitely the bowl vent, dont plug it up. However in my experience, the nipple on the intake has been the vacuum for the fuel cock, and oil goes into a nipple on the side of the carb.  More than one way to skin a cat I suppose |
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Post by harleyracer59 on Oct 15, 2019 18:03:27 GMT -5
on the aeros. sprees express' and early elites pre dio, all go through the manifold. the all have 2 nipples 1 for oil and 1 for petcock vacuum. only carbs ive seen with oil injectors are the dio pz carbs. and a quick way to distinguish is their oil port nipple, is directly on side of carb slides. all others that are vent will be on either side of the slide. I posted pics ealier in this thread for reference. this is all us honda info im talking about. I know Yamaha oil inject through carb on a few models.  |
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goodkat
Scoot Enthusiast
Posts: 178
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Post by goodkat on Oct 16, 2019 0:48:21 GMT -5
Wait wait wait...something is not right here. So, there were 3 hoses - I made the photo after I removed the oil pump, but the oil feed line was connected to port #1. More than this, the scooter was smoking at idle / when throtteling, which means that oil was mixing with fuel.
Let's reboot a bit: I still have two lines (fuel and vacuum) - fuel line goes to port #2. Vacuum line goes where?
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Post by pitobread on Oct 16, 2019 10:05:00 GMT -5
It's supposed to mix oil and smoke at all times. It's a 2 stroke.
I would just look at the factory service manual for a sk50m. It will tell you what you need to know.
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Post by pitobread on Oct 16, 2019 10:06:11 GMT -5
Is this a top tank?
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goodkat
Scoot Enthusiast
Posts: 178
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Post by goodkat on Oct 16, 2019 14:19:31 GMT -5
It's supposed to mix oil and smoke at all times. It's a 2 stroke. I would just look at the factory service manual for a sk50m. It will tell you what you need to know. I know that a 2stroke is a smoke machine, but what I wanted to highlight is that even if the oil line was plugged in the port #1, the mix was being made somehow. So I am still not sure if the port #1 shouldn't be used as a vacuum port for the fuel tank. Yes, the tank is above the carburetor, under the seat. Thanks!! |
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Post by harleyracer59 on Oct 16, 2019 22:57:43 GMT -5
It's supposed to mix oil and smoke at all times. It's a 2 stroke. I would just look at the factory service manual for a sk50m. It will tell you what you need to know. I know that a 2stroke is a smoke machine, but what I wanted to highlight is that even if the oil line was plugged in the port #1, the mix was being made somehow. So I am still not sure if the port #1 shouldn't be used as a vacuum port for the fuel tank. Yes, the tank is above the carburetor, under the seat. Thanks!! ive hooked it up there in the past not knowing. the problem is you carb is jetted to run straight gas, once you start mixing oil into the bowl. you've changed every thing metered in the carb. the jets are now pushing fuel and oil effectively leaning out your mixture. if you plug port 1 off , itll starve it out because the bowl can t vent pressure or breath, for the lack of a better word... port 3 is for your petcock vac line. the 4th port I was taling about is in the crank case next to the oil pump. and as to your oil pump port mystery. I really think youre supposed to have a pa carb on it. ( with the oil port on the carb slide), the carb old geek thought yours was. but since youre plugging the pump cavity, don't worry about it. you don't need one |
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goodkat
Scoot Enthusiast
Posts: 178
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Post by goodkat on Oct 18, 2019 1:31:15 GMT -5
Update: I've sent the aluminum billet to a friend , he'll make a plug for the oil pump. Had a look at the picture posted previously and I could not find any oil port near the oil pump / crankcase, so it's still a mistery. Might the Giorno be different than Dios?
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No more hoses and that ugly oil tank.
More than one way to skin a cat I suppose 
