Outdoor Power Equipment and Small Engines - lawn tractor

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gbpack1950
09-11-07, 08:32 PM
when cutting grass with my sears tractor it starts missing and back firing any ideals what the problem could be

geogrubb
09-11-07, 08:45 PM
Need to post engine Mfg, Model, etc; before much help can be given. Right now your asking how long is a rope. Have a good one. Geo
puey61
09-12-07, 03:30 AM
To better help you (or help you, period) we need more information. Lift up the seat on your machine, you'll find a sticker with a model and serial number. Next open up the hood and find the identification plate/sticker of the engine ON the engine and more times than not, on the flywheel (blower) shroud. Post back with these and some more specifics as far as when the trouble is encountered. In other words, how many minutes into your mow session does the problem arrise? And, does it show up consistently each time you use the mower? When's the last time any tune-up was performed on the mower? How old is the machine?

gbpack1950
09-14-07, 07:14 PM
To better help you (or help you, period) we need more information. Lift up the seat on your machine, you'll find a sticker with a model and serial number. Next open up the hood and find the identification plate/sticker of the engine ON the engine and more times than not, on the flywheel (blower) shroud. Post back with these and some more specifics as far as when the trouble is encountered. In other words, how many minutes into your mow session does the problem arrise? And, does it show up consistently each time you use the mower? When's the last time any tune-up was performed on the mower? How old is the machine?

hi puey here's what I have Craftsman 21hp ohv V twin model # 917-271851 serial # 032102c004092 on motor says Family ybsxs7242vf I have had this tractor 5yrs. When problem started I put new plugs.Never been tuned. The problem happens every time I rev the motor
cheese
09-14-07, 08:33 PM
Does the engine run fine at low rpm, or does it surge?
gbpack1950
09-15-07, 03:31 PM
Does the engine run fine at low rpm, or does it surge?

engine runs fine at low rpm does not surge
cheese
09-15-07, 10:57 PM
Will it smooth out with partial choke?
gbpack1950
09-16-07, 08:30 PM
Will it smooth out with partial choke?

hi cheese, when I pull the choke partial it will slow down.It backfires when I ingage the blades.It seems to happen under a load
cheese
09-17-07, 11:47 PM
Sounds like the carb isn't quite getting enough feul from the tank. If it's gravity fed, pull the fuel line and see how fast the flow of fuel is from it.
gbpack1950
09-18-07, 07:27 AM
Sounds like the carb isn't quite getting enough feul from the tank. If it's gravity fed, pull the fuel line and see how fast the flow of fuel is from it.

thanks cheese we'll give it a try