Gas coming out of exhaust
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1980 p200e
Joined: 12 Feb 2020
Posts: 1
Location: Northeastern USA
Wed Feb 12, 2020 6:46 pm quote
Left petcock on by mistake for about a week when I noticed gas on the floor quite a bit and dripping pretty steady out of tailpipe. Have read a little bit and they seem to say drain gearbox oil 2times . Does crankcase need to be drained and if so where the heck is the drain ? Thanks
'81 P200E, '80 P200E, '64 V90 and 3 Ciaos
Joined: 27 Mar 2014
Posts: 187
Location: Tucson, AZ
Wed Feb 12, 2020 6:50 pm quote
The only drain is on the gearbox. To drain the crank chamber, turn off the gas, pull the spark plug and kick it over a few times.
73 Rally, 74 Rally, 76 ET3, 80 P200, 06 PX150, 65 Li225 Silver Special, 86,95,96 Elite 80s, 2015 HD Road Glide Special, 2011 Ural Tourist
Joined: 18 Jan 2012
Posts: 3409
Location: Oceanside/ SF
Wed Feb 12, 2020 8:58 pm quote
Take the scooter outdoors and try to fire it up. If it runs and spits gas out the exhaust, let it run until all the gas is done spitting. Then go for a ride to make sure it is all clear. Turn the fuel tap off and let it run out of gas. Moving on...

Unless your engine cases or engine seals are toast, I wouldnt worry about draining the gear box oil. One thing you can do, is get familiar with the gear box fill bolt and check your gear box oil.

If you look down at the rear right of the motor, close to the rear shock mounting bolt, you'll see a small bolt with "olio" stamped into the head. On the newer P's its got a large flat head. Unscrew it and add some Non detergent 30w oil until it starts to dribble out. The fill hole is machined to overflow at the perfect amount.

If for some reason you open the fill bolt and a gas/ oil mixture starts rushing out at you then you have much bigger problems to worry about. Report back if thats the case.

After the gear oil is topped off, install the fill bolt just snug. You do not want to strip the threads torquing things down.
85 Vepsa PX150E with sidecar, 80 P200 with sidecar, 96 Goldwing with Hannigan Sidecar, LR87aj5, LR91aj3
Joined: 11 Oct 2011
Posts: 556
Location: Central Washington State
Thu Feb 13, 2020 9:31 am quote
may wish to check the float and needle valve.
Old douglas ..smallie with polini 115..super with nasco 177
Joined: 07 Nov 2013
Posts: 569
Location: New Zealand
Thu Feb 13, 2020 2:40 pm quote
float needle
Ya smacks of a float needle issue..replace it regardless. some times the area where it seats down inside the carb can get dirt stuck or at other extreme times it actually wears out the metal in the carb and so and rubber tip of the needle cannot seal.

The float itself may have a crack so get a new one

Ive seen floats that bind and get stuck on the bowl housing..esp if the bolts are loose

(Some one with the skills post the skewer on a drill trick to clean out the needle seating area

chur from middle earth
good luck
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