Small Engines (Lawn Mowers, etc.): B&S Pulsa-Jet Wont Fill

Question
QUESTION: I have a 5hp B&S with a pulsa-jet carb (fixed jet). If I take carb off the fuel tank and manually fill reserve bowl (that sits just inside the fuel tank), engine runs just fine for roughly 2 min then quits (reserve bowl is empty). The fuel pump diaphragm is wet when disassembled and looks brand new. I was given the rototiller with the disclaimer that the previous owner narrowed down the trouble to the carb but had given up and I'm not sure what work or new parts he has into it. I have manually checked that pathways are clear and air flows freely. Spring looks good as well.

Carb P/N: 498298

I've taken it a part, inspected, and reassembled about 5 times now.
Also, where do I get parts where they won't kill you on shipping?

ANSWER: Hello Justin:

>>Send me the Model and Type or Spec Numbers Off the Engine, Please. With these I can Locate the Proper Manual and Better Assist you. The Model Numbers May be Stamped Into the Blower Housing (metal engine cover) Above the Spark Plug or the Muffler. Many horizontal shaft, overhead valve engines have these numbers stamped into the OHV rocker cover. However, on certain overhead valve powered generators, the equipment manufacturer installs a decorative chrome rocker cover OVER the Briggs cover. If your engine has a decorative cover, it may be necessary to remove it in order to locate the Model, Type, and Code. If this is a Briggs and Stratton  Engine, then you can Also Use this Site Addy; http://www.briggsandstratton.com/maint_repair/BS_modeltypecode.pdf for Assistance in Locating the Model, Type and Code Numbers of a Briggs and Stratton Engine.
>>Thanks.

Respectfully

John

>>PS: I am Allowed to Answer 3 Questions a Day. If you See I am Maxxed Out, then Try Submitting your Question at or Just After 8pm EST (US). My New Day Starts then. Follow Up Questions are Accepted at Anytime. Comments and Ratings are Greatly Appreciated. Thanks.

Respectfully

John

---------- FOLLOW-UP ----------

QUESTION: John -

Thanks a ton for the reply.  I don't have the model number but it's this carb here: http://outdoorpowerinfo.com/repairs/briggs_pulsa-jet_horiz_fixed.asp

It's B&S P/N: 498298

I figured it out last night and didn't have a chance to reply.  The copper tubing that extends from the carb to the fuel tank has an air leak thus not allowing the suction required. It looks like the copper tube is a "rolled" tube and it's leaking air along the seam.

My next questions is how do I replace it. This guy (http://outdoorpowerinfo.com/repairs/briggs_pulsa-jet_horiz_fixed.asp) says the part is machine pressed thus I'm thinking the whole carb needs to be replaced.

A) Is there a compound or bond that isn't gas soluble?  Right now I used glue to test my theory and prove that it was an air leak in said tube.
B) The gas tank shows signs of rust on the inside.  Should it be replaced no questions asked or is there options like running it until it shows problems or some sort of cleaner/solvent?

Answer
Hello Again Justin:

>>Thanks.
>>I wanted to Verify the Carburetor Style.
>>The Brass Insert (Pickup Tube Extension) is Pressed Into the Carburetor and Most Shops are Not Set up to Replace them.
>>Most Shops Replace the Complete Carburetor whenever this Tube becomes Bad.
>>You can View a Breakdown/IPL of this Engine at this Site Addy, http://www.outdoordistributors.com/ and Select "Click Here For The Parts Menu". Then Select B. Then Select "Click Here If You Don't Have Your Part Numbers". Now Select the File (using the first 2 Numbers of your Model Number) for your Model.
>>The Cost of this Carburetor is Listed at Outdoor Distributors as $87.22us and this does Not Include S&H.
>>As Always, If you Hit a Snag or this Does Not Correct the Problem,  I Hope to be Here if You Require More Assistance. Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Happy. Thanks.

Good Luck

Respectfully

John

PS: I am Allowed to Answer 3 Questions a Day. If you See I am Maxxed Out, then Try Submitting your Question at or Just After 8pm EST (US). My New Day Starts then. All Follow up Questions are Accepted at Any Time. Comments and Ratings are Greatly Appreciated. Thanks.

Respectfully

John