I would check the big three first of all. Spark, compression and fuel. Sounds like you have spark and fuel. I would get a compression tester to check actual amount of compression. If all three of those things are good I would check valve lash. You will need make, model and serial number of engine. If you post these I can help find specs for you. Good luck.
I’m happy to assist further over the phone at https://www.6ya.com/expert/layne_0fccff498c319c32
SOURCE: mower backfires and loss of power
i would also check fuel flow. pull the gas line from the carb and see if gas flows out at a good rate (into a metal can of course) or if it trickles out. if the latter, then gas tank either has junk at the bottom preventing the gas from flowing or the vent hole (usually on the gas cap) is plugged.
i have also had my carb float bowl rust out on me, but that took 10 years.
SOURCE: Craftsman riding mower floods after a few seconds
FYI...just thought I'd give a little back...
had exactly the same mower/plow w/ same issue !
mine is an older L-head from pre-1998...used....
19.5hp 3 screw type diaphram fuel pump carb...
the pic's and how to assemble... I will send if,
you email me... Instructions do not come from
B&S when you buy there part # 694056... = 10$
carb rebuild kit...they want to sell the manual too !!!
sku# 0 24847 26246 9 ...shame on them !
they are selling manual # 27xxxx for 20$...
to tell you what to do ! ....%$#-THEM !!!
I made a pdf...with before and after pic's of
how to rebuild this carb...it's quite unique in fuel pump design and simplified governor operation...
...
running well this 19.5 twin - fan cooled...is like a 25HP !
the carb kit from B&S is generic...w/extra parts...
I have pic's of the actual ones used/needed for this
carb... Main jet is mis-labeled...it's a bowl vent !
There are no jet's to adjust on this carb...
only adjust is idle speed post the governor linkage !
also shown functioning in my .pdf...
hit my mail ..... driscoll_at_pzdi_"dot"_com
or visit www _ pzdi _ com
248-390-3541
473 views
Usually answered in minutes!
×