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Post by richard06877 on Apr 24, 2009 23:05:04 GMT -5
OK guys, here's another one for y'all. I ordered a gas cap for my 150 and it came today. The issue with it in my mind is that it doesn't seem to have a working vent. The part came in a John Deere bag within another bag labeled HM, UP06559. I tried to blow some air through the cap, but none filtered through that I could tell. It also came with this small loose red cap, with a "duckbill" on one side and a "plug" type seal on the other. That's one thing. The other is-- on the side of the cap is what appears to be a vent made of a hardened mesh-type brass or something similar. On first glance it would appear to be a vent?? I'll try to attach photos of this cap. SO, question, will this cap vent properly? Of course, I can run the engine and if it stalls, I can unscrew the cap to see if the motor will start again, but I want to know if anyone can tell me WHERE this duckbill thing fits into the cap? If the cap had an existing vent hole, I'd assume it would fit so that air would flow into the tank (duckbill side pointing into tank), but this cap doesn't pass air at all that I can tell. Hmmm. Any ideas? Thanks.
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Post by chainsawlady on Apr 24, 2009 23:20:05 GMT -5
If you pull the brass plug out with an ice pick or something, you will find the duckbill under that which keeps the gas from coming out, but letting the air in to vent.
chainsawlady
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Post by richard06877 on Apr 24, 2009 23:20:45 GMT -5
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Post by MCS on Apr 25, 2009 8:06:09 GMT -5
I would think there is already a duckbill under the brass screen. Maybe you got a spare duckbill  I hope you are only using a straw and not an air compressor to test the venting. The brass "plug" is nothing more then a filter to keep sawdust or wood chips from being drawn into the duckbill. Since you seem to be unfamiliar with this, I will point out that the direction of air passage is from the brass plug through the duckbill to the tank  Put some gas in the tank, screw on the new cap, tip the 150 upside down and see if it seeps gas. You will know right away if there is no duckbill in the new cap ;D |
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Post by lesorubcheek on Apr 27, 2009 6:53:47 GMT -5
Yep, for sure, as already said by chainsawlady and A7, the duckbill's proper home is inside the cap behind that porous brass plug. As A7 said, the direction of air flow should be into the tank, so blowing should indicate a sealed cap. Sucking on the other hand should let air flow through.
It could be the case that there is an old duckbill hiding in there, and it could have turned into duck soup and be gumming up the vent. Make sure air does flow by sucking and not by blowing, and it should work fine. If air won't move in either direction, then its plugged and will need to be repaired.
Dan
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Post by richard06877 on Apr 28, 2009 21:54:17 GMT -5
Hi Folks:
Thanks for all the tips for me, much appreciated. Yes, it appears that there is already a duckbill in there, as some air does pass into the underside of the cap when it's off the tank, but none goes the other way. I guess the other duckbill is an extra.
Thanks again for everyone's postings.
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I hope you are only using a straw and not an air compressor to test the venting. The brass "plug" is nothing more then a filter to keep sawdust or wood chips from being drawn into the duckbill. Since you seem to be unfamiliar with this, I will point out that the direction of air passage is from the brass plug through the duckbill to the tank 