OP
@davidslane avatar
UTC

Member
1981 Vespa P200E
Joined: UTC
Posts: 15
Location: Southern California
 
Member
@davidslane avatar
1981 Vespa P200E
Joined: UTC
Posts: 15
Location: Southern California
UTC quote
Do you pre-mix your first tank of gas after a fresh engine rebuild? Engine is auto-lube, if so what is pre-mix ratio and what are the pros and cons of pre-mixing... Cheers!
@shoprat75 avatar
UTC

Enthusiast
1980 P200e
Joined: UTC
Posts: 56
Location: Hendersonville,NC USA
 
Enthusiast
@shoprat75 avatar
1980 P200e
Joined: UTC
Posts: 56
Location: Hendersonville,NC USA
UTC quote
When I rebuilt my 1980 P200e with autolube I premixed the first tank. The thing smoked so bad I thought the neighbors would complain. Ended up draining the tank and putting in fresh gas. I also drained the 2 cycle oil and started using Bel Ray synthetic. It onlY smokes now when I start it. I have probably 800 miles since rebuild. When I rebuilt my 1979 125 with a 177 Polini kit I just used the autolube and made sure I had oil up to the pump. Never had an issue with lack of lubrication. My thought is if you are going to premix use minimum amount of fuel mix to make sure autolube is working.
@oopsclunkthud avatar
UTC

Banned
3:5
Joined: UTC
Posts: 8992
Location: San Francisco
 
Banned
@oopsclunkthud avatar
3:5
Joined: UTC
Posts: 8992
Location: San Francisco
UTC quote
one gal of 2% premix will assure there is no gap in lubrication.

You can introduce an air bubble into the oil line to validate it is working. as soon as the bubble is gone you can top up the tank so now it's less than 1% in the premix.
@chandlerman avatar
UTC

Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate, 79 P200E, 66 Lammy S3
Joined: UTC
Posts: 9962
Location: Nashville

72 Days Since Last Explosion
 
Lucky
@chandlerman avatar
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate, 79 P200E, 66 Lammy S3
Joined: UTC
Posts: 9962
Location: Nashville

72 Days Since Last Explosion
UTC quote
I don't but I do make sure that the oil line is full before I connect it.
@qascooter avatar
UTC

Ossessionato
79 P200E (Ruby), 62 Allstate (B-62)
Joined: UTC
Posts: 4285
Location: Florence, OR
 
Ossessionato
@qascooter avatar
79 P200E (Ruby), 62 Allstate (B-62)
Joined: UTC
Posts: 4285
Location: Florence, OR
UTC quote
oopsclunkthud wrote:
one gal of 2% premix will assure there is no gap in lubrication.

You can introduce an air bubble into the oil line to validate it is working. as soon as the bubble is gone you can top up the tank so now it's less than 1% in the premix.
+1

I did a 1/2 gallon of 2% premix and run on reserve, and when the bubble gets sucked in (fairly quickly), I filled the tank with clear...
@safis avatar
UTC

Ossessionato
1979 P150X, 1983 P200E, 1987 PK125XL Elestart, 1988 T5, 1995 PX200E, 2011 Yamaha Fazer 600 S2
Joined: UTC
Posts: 4316
Location: Veria, Greece
 
Ossessionato
@safis avatar
1979 P150X, 1983 P200E, 1987 PK125XL Elestart, 1988 T5, 1995 PX200E, 2011 Yamaha Fazer 600 S2
Joined: UTC
Posts: 4316
Location: Veria, Greece
UTC quote
Seen your post on FB. Make sure you have an autolube carb. I bought one last year from Piaggio (sold as an autolube carb with the correct part code) and although it was drilled from the bottom it didn't have the vertical drilling done to it. My supplier took it back and told me it wasn't the first one assembled and packaged wrong...

Check down the carb's throat for the oil weeping hole...
Forum member supplied image with no explanatory text
OP
@davidslane avatar
UTC

Member
1981 Vespa P200E
Joined: UTC
Posts: 15
Location: Southern California
 
Member
@davidslane avatar
1981 Vespa P200E
Joined: UTC
Posts: 15
Location: Southern California
UTC quote
SaFis:
It does, that's not an easy picture to take.. lol
Forum member supplied image with no explanatory text
@keaton85 avatar
UTC

Addicted
Stella 2T, P200, Rally 180 Euro
Joined: UTC
Posts: 637
Location: Camden, ME
 
Addicted
@keaton85 avatar
Stella 2T, P200, Rally 180 Euro
Joined: UTC
Posts: 637
Location: Camden, ME
UTC quote
Another thing that I have done for rebuilds is pulling the plug, turning the auto lube to max and spinning the engine over with a drill. All while looking inside the carb for the oil to start coming out.

I rebuilt a 150HP Yamaha 2-stroke that I hooked a drill up to the autolube pump and made sure every cylinder was getting oil. That was a big V6 2-stroke rebuild that really needed the oil. I also left it on max for the first few minutes of idling. NOT an engine you want to mess up after a rebuild.
@ginch avatar
UTC

Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8694
Location: Victoria, Australia
 
Veni, Vidi, Posti
@ginch avatar
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8694
Location: Victoria, Australia
UTC quote
keaton85 wrote:
Another thing that I have done for rebuilds is pulling the plug, turning the auto lube to max and spinning the engine over with a drill. All while looking inside the carb for the oil to start coming out.

I rebuilt a 150HP Yamaha 2-stroke that I hooked a drill up to the autolube pump and made sure every cylinder was getting oil. That was a big V6 2-stroke rebuild that really needed the oil. I also left it on max for the first few minutes of idling. NOT an engine you want to mess up after a rebuild.
Great tip Keaton!!!

Can you please put that up here as well? Random tricks, share your best little tips & shortcuts Cheers!
@swiss1939 avatar
UTC

Ossessionato
P208, Stella VMC Stelvio 187, Stella 150, VNX1T, V9A1T, V9B1T, 02 Sportster XLH1208
Joined: UTC
Posts: 4110
Location: Staten Island, NY
 
Ossessionato
@swiss1939 avatar
P208, Stella VMC Stelvio 187, Stella 150, VNX1T, V9A1T, V9B1T, 02 Sportster XLH1208
Joined: UTC
Posts: 4110
Location: Staten Island, NY
UTC quote
Good ol' freak moped has a video for every topic!

https://www.youtube.com/watch?v=Hku0zfam1A8
@rb_prior avatar
UTC

Hooked
1963 Allstate, 2005 Vespa PX150, 2001 Harley 95 ci Dyna
Joined: UTC
Posts: 320
Location: Central Ohio
 
Hooked
@rb_prior avatar
1963 Allstate, 2005 Vespa PX150, 2001 Harley 95 ci Dyna
Joined: UTC
Posts: 320
Location: Central Ohio
UTC quote
I replaced the fuel and oil lines on my US 2005 PX150. I had a difficult time attaching the oil line on the carb connector and when I was finished the oil bubble was longer than I wanted. It was nearly 3 inches long and I thought if I run the engine until the air bubble was sucked in I may get some engine wear or damage. My fuel level was low as the reserve light was on so I added 2 oz of Motul 710 2T oil to the fuel tank. I started the engine and let it idle as the air bubble was sucked in. It took about 6 minutes and the video reference below shows the later part of the air bubble being sucked in. You can see how slowly in travels. Once the air bubble was gone, I rode it for a few miles then added regular 90 octane ethanol-free gasoline to the tank. All is well.

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