QuestionQUESTION: B&S engine 110908, Type 0172... I have the same problem described earlier by Matt "...can restart the engine after a little effort by manually holding the choke plate open and pull. It runs rough and it always floods out.
When I look into the throat of the carb while it is running (looking down through the air intake tube), I can see an uneven stream of gas coming up from and through the carb fuel supply nozzle. Usually, a few large drops of fuel will bubble up and choke out and stop the engine....'
Carb to tank is completely flat and no hole on the new diaphragm. After several times of disassy, cleaning and assembly of the carburator, the probelm still persists. Did you get a feedback how Matt resolved his same problem?... What do you suggest I do more... I'm goin' crazy...
ANSWER: Hello Nick:
I am Not Sure if Matt Followed Up with me on his Problem. However, 1- Check the Gas Tank Cap and Ensure it is Venting Properly. If the Cap is Not Venting, Vibration Causes the Gas to Form Pressure in the Tank and Cause the Carburetor to Flood by Pushing Gas Up Through the Jet. 2- Set the Air Mixture Screw as Follows. Turn the Screw in Until SNUG. **DO NOT JAM** Then Reverse 1 1/2 Turns. Start the Engine and then Set the Air Mixture Screw so you have Full Throttle and the Engine Does Not Bog Down when in High Grass or Under a Load. You can View a Breakdown/IPL of the Unit at this Site Addy; http://www.briggsandstratton.com/maint_repair/manual_and_more/doclist.aspx?categ and Enter the Model Numbers (110908) and Type Numbers (0172) in the Appropriate Boxes and Click GO. Then Select Download PDF. If you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance. Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Thanks.
Good Luck
Respectfully
John
PS: I am Allowed to Answer 10 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. Thanks.
Respectfully
John
---------- FOLLOW-UP ----------
QUESTION: The cap is fine and the ports clean. The bottom of the air horn has a hole, 1/8 in dia open to the separate chamber built into the tank and not directly open to the tank. Gas comes out through that hole and floods the carb. Could it be insufficient engine vacuum? By the way, what's the compression pressure on the engine?
ANSWER: Hello Again Nick:
All Engines Must have Compression Higher than 70 PSI to Run, but Usually if the Compression is Lower than 80 PSI; then Engine has Idling Problems. I Looked at the Breakdown of the Engine and Carburetor. This is the Old Tank Mounted Carburetor and is the Most Reliable and Easiest Carburetor to Maintain. If the Carburetor has been Cleaned Properly and a New Diaphragm Properly Installed, then Make Sure the Carburetor Air Mixture Screw is Properly Set. Starting with the Air Mixture Screw at 1 1/2 Turns Out and Using your Fingers to Over Ride the Governor, Rev the Engine and Slowly Turn the Air Mixture Screw Until the Engine Revvs to Full Throtle Properlly. From your Description, this Sound like the Air Mixture Screw is Improperly Set Allowing too Much Gas to Travel Into the Engine Causing Flooding. Check the Intake Tube and Ensure it is Still Connected Tight to the Engines Intake Port. You will have to Remove the Blower Housing and then you can see the Connection Point and the Bolts. If you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance. Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Thanks.
Good Luck
Respectfully
John
PS: I am Allowed to Answer 10 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. Thanks.
Respectfully
John
---------- FOLLOW-UP ----------
QUESTION: Thanks for your quick response. The problem was an obvious but a tricky one to see. The hole at the bottom of the carb is open to the tank and where the gas was coming up is threaded. It was meant for the air cleaner assy screw to keep the cleaner attached to the carb. The screw runs through the choke plate. Once the screw is in place, and therefor plugging the hole, the engine runs properly drawing the gas throuhg the carb passages. I kept trying to start the engine without the screw in place and the engine was dieing. So, a little feedback and thanks for all your help.
AnswerHi Nick:
Thanks for the Feedback. Hopefully it will Assist Another Questioner when they Read this. Also, I will Add this to the List of Possible Causes for this Problem. Till Next Time. May All Your Mechanical Problems be SMALL ONES and May the All Mighty Bless You and Yours. Thanks Again.
Best Wishes and Good Luck
Respectfully
John
