S200TXRV carburetor leak

[Thor_Driver]

My motor is a 1997 model year s200txrv. It sat for over year and the fuel turned bad. I cleaned the tank, lines, filters and such and removed maybe two quarts of water with 40 gallons of fuel I had to repurpose.


Fresh fuel, 90 octane recreational gas, no ethanol added to the fuel tank. Motor started and stopped straight away. I tried a few squeezes on the primer bulb and fuel squirted out the air jet intake on the top carburetor. I thought that the floats were hung up and took it off to find it full of an opaque jell like b b size pellets. I removed the other two carburetors and found similar conditions so I rebuilt all three of them. I also cleaned the two fuel pumps.


I re-installed the carburetors today and the same thing on the top carburetor occured again. Fuel squirts out of the main jet air intake of the carburetor, the other two are fine.


With the carburetor off the motor, I can hold the carburetor upside down to seat the needles and push 20 psi of air from the compressor and no there is no leakage.


I am at a lost as to what causes this and would greatly appreciate any ideas to remedy the situation.


Thank you in advance for any help you can offer.

 

[Sea Rider]

Seems that valve needle is not seating nor sealing correctly against needle seat once fuel bowl is full, needle must be extremely sharp pointy, replace if rounded or with grooves on tip's sides.

Check with a small flashlight internal valve seat condition, if extremely darken, dirty, with microscopic fuel/2 strokes oil adhesions, follow this simple effective cleaning procedure:

-Get a a sushi wooden stick.
-Roll tight a piece of cotton to make a sushi swab stick.
-Dip it in water, put an overdose of toothpaste on tip.
-introduce tip fully into valve seat and gently roll it CW-CCW as to polish, shine it.



Repeat the whole procedure till new cotton tip comes out impeccably clean and valve seat looks smooth shinny even.


Note : Could use a Q-Tip if a sushi stick is not available.

Will never again have needle/needle seat related issues if this was the cause of your carb leak problem. Post results if going per that route. If worked, can do same procedure on all carbs..

Happy Boating

 

[Thor_Driver]

Sea Rider,
Thank you! I will give it a try this evening. Makes sense to me,

 

[Sea Rider]

Sea Rider,
Thank you! I will give it a try this evening. Makes sense to me,

You're welcome, check that carb's bowl has middle o'ring in mint flexible condition, if found dried, hardened, cracked, change it, carb could leak from there too aside from needle/needle seat issues.

Happy Boating