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17.5 Briggs and Stratton engine

#1

C

Cannuck

17.5 Briggs and Stratton engine on a craftsman riding mower model 311707 starts but won't stay running seems to be starving for fuel. It has a new fuel filter (yes filter is in the right way) let the unit sit for a couple of minutes and it will start but won't stay running.Any ideas will be much appreciated.


#2

M

mechanic mark

Post all numbers from engine: model xxxxxx, type xxxx, trim xx, code xxxxxxx.


#3

S

slomo

1.Remove fuel tank. Clean out 100% with compressed air. Install new fuel line, filter and shut off valve if you have room.
2.KEEP and remove OEM carb. Remove carb from engine. Break it down removing all small parts. Boil clean the carb on your stove top with water and those automatic dishwasher balls. Use a candy thermometer to keep water/soap temp at 200F. Boil for 30 minutes. Rinse well in clean water to neutralize after. Reassemble carb. Flip carb over and blow test carb needle/seat. Should hold 7psi for 30 minutes.
3.Clean block and cooling fins YEARLY per your engine manual. Remove top metal engine shroud exposing cooling fins. Neglect this and you will get engine damage.
4.Adjust valves per your engine manual.
5.Decarbon cylinder and valves every 5 years or suggested interval in your engine manual. Neglect this and you will get engine damage.
6.Test ignition coil with old spark plug gaped to 0.250" or 1/4". Check for good blue spark. Check for spark if and when engine dies with inline spark tester.


#4

C

Cannuck

model 311707, type 0132-E1, code 9906132D


#5

T

Tinkerer200

Before you do all that, check that the gas cap vent hole is not obstructed.
Walt Conner


#6

C

Cannuck

Hi everyone thanks for all the helpful advice, believe it or not the stripping of the carb and boiling it with a dishwasher pod for thirty minutes actually worked


#7

C

Cannuck

slomo said:
1.Remove fuel tank. Clean out 100% with compressed air. Install new fuel line, filter and shut off valve if you have room.
2.KEEP and remove OEM carb. Remove carb from engine. Break it down removing all small parts. Boil clean the carb on your stove top with water and those automatic dishwasher balls. Use a candy thermometer to keep water/soap temp at 200F. Boil for 30 minutes. Rinse well in clean water to neutralize after. Reassemble carb. Flip carb over and blow test carb needle/seat. Should hold 7psi for 30 minutes.
3.Clean block and cooling fins YEARLY per your engine manual. Remove top metal engine shroud exposing cooling fins. Neglect this and you will get engine damage.
4.Adjust valves per your engine manual.
5.Decarbon cylinder and valves every 5 years or suggested interval in your engine manual. Neglect this and you will get engine damage.
6.Test ignition coil with old spark plug gaped to 0.250" or 1/4". Check for good blue spark. Check for spark if and when engine dies with inline spark tester.
Click to expand...
thanks the boiling part actually worked


#8

C

Cannuck

slomo said:
1.Remove fuel tank. Clean out 100% with compressed air. Install new fuel line, filter and shut off valve if you have room.
2.KEEP and remove OEM carb. Remove carb from engine. Break it down removing all small parts. Boil clean the carb on your stove top with water and those automatic dishwasher balls. Use a candy thermometer to keep water/soap temp at 200F. Boil for 30 minutes. Rinse well in clean water to neutralize after. Reassemble carb. Flip carb over and blow test carb needle/seat. Should hold 7psi for 30 minutes.
3.Clean block and cooling fins YEARLY per your engine manual. Remove top metal engine shroud exposing cooling fins. Neglect this and you will get engine damage.
4.Adjust valves per your engine manual.
5.Decarbon cylinder and valves every 5 years or suggested interval in your engine manual. Neglect this and you will get engine damage.
6.Test ignition coil with old spark plug gaped to 0.250" or 1/4". Check for good blue spark. Check for spark if and when engine dies with inline spark tester.
Click to expand...
i will be pulling that shroud before I put it back in service


#9

S

slomo

Cannuck said:
i will be pulling that shroud before I put it back in service
Click to expand...
Post pictures of your filthy block and cooling fins please. Remove it all down to the flywheel.

Several people are saying they pulled the shroud and all was clean. Every, I repeat, every used mower I've bought or curb grabbed, there is a ton of cleaning to do. Fins and block all slathered with oil/grass/dirt and valves, piston and head are loaded with carbon.

If you engine is over 5 years old you've got work to do.


#10

S

slomo

Cannuck said:
i will be pulling that shroud before I put it back in service
Click to expand...
Again every year of mowing this is a must. If you have a bagger, even more cleaning jobs are needed.


#11

M

mechanic mark

Results

www.briggsandstratton.com www.briggsandstratton.com


#12

D

DaveTN

Hi and Welcome to the LMF! Did you save any of the
carburetor "soup" for us after you boiled it? LOL


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