QuestionI have a B&S 18hp twin cylinder engine, that I was told the fuel pump needed repaired. I replaced the two springs and the 2 rubber gaskets?, and am still having the same problem the engine will only run when either spraying starting fulid or pouring gas into the carb, mod# 422707, type 1214 01, code 9408125B.
This is in a PowerKraft Mod# TMO 3400005A, 135Q699H088
Ser# 1A305H20175 I was told this mower was built by MTD, but I don't know if this is true.
However my question is, there is a vaccum? line comming from the engine under the carb and going into the fuel pump, I have cranked the motor over with the key while holding my finger over the end of this hose and felt very little suction, should there be very much suction on this hose, is there a way to measure it. ?
Thank you
Storm Cloud
AnswerThere is not much vacuum on the pulse-line. Briggs does not publish specifications for measuring any vacuum/pressure as the reading vary across engines. Bottom line, the fuel pump needs very little vacuum to operate.
Did you check the parts list diagram to make sure the diaphragms and gaskets are in the correct location?
http://www.briggsandstratton.com/maint_repair/manual_and_more/docsearch.aspx?eng...
Were there two little spring and one larger spring with a cap for the spring?
With the carburetor mounted on the engine, can you remove the top of the carburetor? Some carbs you could remove the top of the carb and then actually watch the fuel pump fill the carb when cranking the engine.
Did you replace the actual fuel pump diapharm? Does you carb have an electronic fuel shut-off solenoid?
Let me know.
Eric
