Snow blower is running sluggish with the choke in the on position
After the blower is started, I move the choke to the off position, but it cuts off and the only way it remains running is to move the choke back to the on position. Its not running to its full capacity and power. I have a toro, model # 38170.
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It's too lean; not enough fuel mixed with the air. Look for the main mixture screw--it should be a large screw with a spring under it on the carburetor. Run the engine until it's warm.
With the engine running, turn the screw outward (lefty-loosey) about 1/8 turn slowly and see if it improves. Slowly turn the screw back and forth until it runs best with the choke completely off. Then set it 1/8 turn richer (turn screw outward 1/8 turn) than the best position.
Reason for doing this: Conditions change, even the barometric pressure. Small engines run okay if they are a little rich but not if they are a little lean.
Why do you say its over heating .Runs for 3 minutes the oil is OK .
Do you understand how the choke works .
bacsicly you prime the mechine in cold condutions 3-4 pumps choke to max throttle at 3 /1/4 .
Start backing off the choke after 3-to4 mins .
The choke shuts the fresh flow down to the engine in cold condutions ware it needs more fuel then air to run.
When the engine starts to get hot it can't run with out fresh air to mix with the gas it won't run anymore because there is to much gas and not enough air
Its simple fool prof will work everytime if you adjust it right
do you have a fuel shut off valve? if so make sure its in the open position. choke closed,prime 3 times and pull cord. if not started after three pulls open choke and look in carb for fuel delivery. if none service your carb also check to make sure you have spark before assuming its the carb
Press primer bulb 6 times
Move throttle lever to start position
Move choke lever to full choke position
Pull starter rope sharply until engine attempts to start, but no more than 5 pulls.
Move choke lever to half choke position. Pull starter rope sharply engine runs. If engine hasn't started after 5 pulls, repeat all steps above.
After warming up for 10 seconds, move choke lever to run position.
Manuallib.com has a manual for this model available for free download
is the choke closed when you start this thing make sure you close the choke to start then shut it off , the plug gets fouled if you do not do it this way make shore you have the right gas mix in it , takes 50 to 1 I believe 2+2
ok heres what you do to get your snow blower to keep running.
while you have it choked, and you get it to the running point, turn the cup bowl ajustment in/out a fraction at a time while you move the chock off slowly till you get the right setting to keep it running then ajust the setting once more to clear it up to purrr like a kitten again the vibration moves the screw out to set everything out of wack......