Clinician
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Post by jbrukardt on Jul 1, 2014 7:35:27 GMT -6
all of those seem to look different. None have the tall copper tube. I ordered a shorter one anyway, it was only 7 bucks, we'll see if it fits, but im wondering the purpose of the two openings in mine
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Post by jbrukardt on Jun 30, 2014 20:25:42 GMT -6
:/ any sources for Puma scooters you guys know of? Im getting nothing on ebay
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Post by jbrukardt on Jun 30, 2014 19:26:13 GMT -6
Vac lines are 3/16", the tank nipple is usually 1/4", the carb inlet is 3/16", and the fuel filter can be 3/16" or 1/4". So you have to adapt from the 1/4" to 3/16" at some point. You can force the 3/16" onto the 1/4" with some WD-40, or get an adapter at auto weinie, or make one from brass fittings at Lowes.
Clear vac lines are a good idea with your type of problem because you can see if gas is working it's way down the vac line to the manifold. by the way, my fuel lines are 5/16s and the vac are 3/16. I guess Puma Scooter are a tad different. I managed to get 3/16 line on everything no problem. Hopefully it doesnt cause a fuel restriction down the road. I dont imagine it will |
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Post by jbrukardt on Jun 30, 2014 19:24:03 GMT -6
ok, just finished tearing her down. I do have a petcock, and rather than no fuel getting out of the fuel line,all the fuel does. Under all conditions, the petcock releases a heavy flow of fuel from the tank. Vac, no vac, neutral, even positive pressure. For the heck of it, i replaced all the lines anyway, and ran into a major problem. I took the petcock out... and cant get it back into the tank, the brass tube coming out of the top jams up against something half installed. Pics: new lines on petcock which is behaving weirdly and flowing all the time  The major problem im having: I cant get the petcock back in the tank  I wiggle it all around, try from varying angles, and it just seems to be hitting a hard stop. Is there some sort of one way valve in there? could i be hitting the bottom of the fuel-gauge float? Its completely blocked. However.... in doing all this, I had a Revelation. The last time this scooter ran, and ran well, I ran her dry, completely out of gas (not a problem in and of itself i dont think). However, i filled her up really full when i refilled her, it is possible to fill the fuel tank too full, and mess with the petcock? I dont know what that little brass tube is, but maybe its supposed to be exposed to air, and i had it under gas because i filled the tank too much? |
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Post by jbrukardt on Jun 25, 2014 8:24:22 GMT -6
agree it sounds like a fuel delivery problem. Will test the vacuum valve this weekend and post results back.
What size tubing do these things take anyway? Some of it is dry-rotting and it would make life a lot easier to just replace it all with nice clear tubing. I could even use two color to differentiate between fuel and vac.
Thanks for the clarity on those "cut" hoses. Glad theyre not.
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Post by jbrukardt on Jun 23, 2014 9:46:13 GMT -6
if you read the post, i already did that :/ comeon dude.
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Post by jbrukardt on Jun 23, 2014 8:19:46 GMT -6
Good morning gentlemen, Building off this previous thread which unfortunately turns out to be ancient, im still having problems with a 50cc I got for a friend of mine. But I feel as if im making progress. old thread for background info: scooterdoc.proboards.com/thread/9410/problem-scooter-stay-running-startSummary:
Heres what it is:
2011 Puma Romeo 50cc in seemingly good shape, 700ish miles on it, with a 50cc taotao engine swapped into it (prev owner said engines were identical)
Heres what it does:
1) Starts fairly clean, idles well for 30 seconds, then conks out
2) once it conks out, absolutely will not start at all without a 20 minute wait. Then back to step 1
3) the minute you put any throttle into it, it dies during that 30 seconds it does run.
Plan of attack:
1) Check for vacuum problems, im actually heavily leaning towards this being it. The previous owner said he "messed with the airbox" and it seemed to be better). Any guides out there for testing vac? I saw something about spraying propellant down the vac line. Problem is, my lines look quite different from the standard diagrams.. and i seem to be missing some. Pictures below
2) Check for loose wires coming from the CDI - DONE, ALL WIRES LOOK GOOD
3) Clean the carb - DONE, not dirty at all
4) Adjust the carb (including checking if the butterfly valve covers the pilot outlets) - DONE, SEEMS TO BE ADJUSTED WELL
5) Theres something about a gasket/spacer on the intake manifold that goes bad, any details on that ya'll can give me an idea on?
6) check out the enricher, make sure thats working right (watched a few videos)
7) and most importantly, most also most in depth, set the valves. This procedure i can do in my sleep from my other small engine experience - DONE, im amazed it started at all, valves were so tight i couldnt fit a .001 in there, adjusted both to .004. Now it idles very strong (no tapping though) and feels good for that 30 seconds.
Ok, now for what i think... think, might be the problem. Something is very odd with the vacuum system. The lines dont go where i expect, and one line seems to be entirely missing/cut.
Pictures of the carb and tubing
^^ theres this tube nipple that comes off the exhaust and goes... nowhere? Theres no tube on it, never has been
and then theres this, a tube that comes out of the carb, and appear to be cut: the one right to the left of tube going to the fuel filter.
Looking at this diagram, i cant even find my "pair system"  I do have a connected tube going to both the crankcase breather, and the s-tube area though. |
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Post by jbrukardt on Feb 21, 2014 13:39:07 GMT -6
I just took a peak under my scoot and I noticed that I have two of the stock fuel filters on my ride. One pre and one post the fuel device (I don't know what we call this but is is grey or silver and has several hose nipples protruding from it). Is having two fuel filters normal or needed? "fuel device" sounds like the carburator? Having one prior is the norm, seems.. odd to have one after though, as fuel does not flow out of the carb from another tube, but rather into the manifold. Sure its not an air filter? |
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Post by jbrukardt on Feb 21, 2014 13:36:29 GMT -6
ouch, took a look at these, and the reviews are actually terrible, as some here have mentioned. They leak like a sieve with the plastic fittings. Gotta get a version with brass fittings.
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Post by jbrukardt on Feb 21, 2014 10:57:37 GMT -6
haha, im a transplant, grew up up north, moved south (barely: to maryland) a long time back for a job, and to get away from the snow. Ive picked up a few mannerisms without even knowing it over the years.
Thanks for the comment about checking the valves first, i was leaning more and more towards that already. Gonna do that this weekend if the weather clears up. For all that effort to excape the snow, this year, its here in force and it makes workin outside a tad tough.
i think ill understand the vac/intake/etc lines better once i get the side off. Im used to stuff that has fuel pumps, albeit limited (crankcase vac controlled) ones.
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Post by jbrukardt on Feb 20, 2014 19:05:49 GMT -6
 Varying tips to accommodate the different line diameters as well. That is a darn nice looking filter. Ill have to swing by advance auto and see if my store has em. If they do ill pick up a couple for the tractors and the scooter. |
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Post by jbrukardt on Feb 20, 2014 19:03:03 GMT -6
So, im a new scooter owner, but an old mechanic. I'm pretty good with small to medium engines (read lawnmower and tractor), but some of the intricacies of scooters (vacuum, etc) are new to me.
I bought a 2011 Puma Romeo 50 for a friend, a homeless gentleman i try to help out who is a damn hard working and honest man, but is stuck in a vicious cycle of not being able to keep a steady job, because he doesnt have transport to a steady job. Picked it up for $350, not a steal, but not bad either, knowing it had some problems.
It has a tao tao 50cc swapped into it at some point (per the previous owners info), and has run fine in the past with that engine, but has always had a tough time starting and holding idle. It seems to be temp related to a degree, previous owner could get it fired up regularly in a heated shed, but I can only get it to start 1 time in 15 out in the cold (35ish F). I know these machines are not designed to be run in that weather too.
So, you guys seems super helpful, and I wanted to run my plan of attack by you for getting this scoot running smooth so i can give it to my buddy.
Heres what it is:
2011 Puma Romeo 50cc in seemingly good shape, 700ish miles on it, with a 50cc taotao engine swapped into it (prev owner said engines were identical)
Heres what it does:
1) If it does start, idles mid (not super low, not high) for 2ish minutes, then conks out
2) tough to start, starts maybe 1 in 10 times
3) the minute you put any throttle into it, it dies
4) seems to "recover" after waiting about 1 minute if its not starting. You let it sit for 1-2 mins, then attempt to fire it up, and it turns over instantly and idles. That makes me think flooding, but i dont know these motors that well.
Plan of attack:
1) Check for vacuum problems, im actually heavily leaning towards this being it. The previous owner said he "messed with the airbox" and it seemed to be better). Any guides out there for testing vac? I saw something about spraying propellant down the vac line
2) Check for loose wires coming from the CDI
3) Clean the carb
4) Adjust the carb (including checking if the butterfly valve covers the pilot outlets)
5) Theres something about a gasket/spacer on the intake manifold that goes bad, any details on that ya'll can give me an idea on?
6) check out the enricher, make sure thats working right (watched a few videos)
7) and most importantly, most also most in depth, set the valves. This procedure i can do in my sleep from my other small engine experience
Ya'll seem like a real friendly helpful community, and id be glad to take any advice you have, or guidance, in hopes that i might pass it along some day. Im confident i can get this thing running, but i can get it running faster with experienced minds lending me just a tad of knowledge. Thank you very much in advance.
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