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SOLVED Briggs & Stratton 122L02-0111-F1 Squeals after start
#1
M
Montecore
M
Montecore
The squealing starts after the engine is running. If started on concrete do not really hear squeal. Start to cut grass and will hear a periodic squeal coming for pulley starter housing after my research this is what I have done so far:
1) Removed the blower housing
2) Removed the black round friction cover
3) Removed the 2 pawls
4) Removed the little springs that were on a spike where prawl sat
5) Noticed 1 of the 2 spikes was broke where prawls set do not think would have much effect both prawls come out when cord pulled and retract back on recoil
6) Removed pulley and cleaned
7) Removed spring and wiped down with acetone
8) Reassembled spring and lubricate with automatic transmission fluid
9) Reassembled and lubricated with ATF the little prawl springs and placed friction disk
10) Wound the pulley counterclockwise until is stopped then backed off 1 full revolution and lined up holes for cord.
11) Adjust cord length so no slack and good resistant for east start 1 pull.
12) Started mower let run few minutes on concrete no squeal
13) Started to cut grass was ok for 30 seconds then fait squeal not as bad as before.
14) This engine is different then many YT videos my flywheel has a cup on top the is 15/16th bolted to flywheel and crankshaft.
15) This squealing is driving me crazy trying to figure it out.
16) Some YT folks say a starter clutch not sure mine engine has that? B&S parts diagrams do not show that.
Thoughts????
1) Removed the blower housing
2) Removed the black round friction cover
3) Removed the 2 pawls
4) Removed the little springs that were on a spike where prawl sat
5) Noticed 1 of the 2 spikes was broke where prawls set do not think would have much effect both prawls come out when cord pulled and retract back on recoil
6) Removed pulley and cleaned
7) Removed spring and wiped down with acetone
8) Reassembled spring and lubricate with automatic transmission fluid
9) Reassembled and lubricated with ATF the little prawl springs and placed friction disk
10) Wound the pulley counterclockwise until is stopped then backed off 1 full revolution and lined up holes for cord.
11) Adjust cord length so no slack and good resistant for east start 1 pull.
12) Started mower let run few minutes on concrete no squeal
13) Started to cut grass was ok for 30 seconds then fait squeal not as bad as before.
14) This engine is different then many YT videos my flywheel has a cup on top the is 15/16th bolted to flywheel and crankshaft.
15) This squealing is driving me crazy trying to figure it out.
16) Some YT folks say a starter clutch not sure mine engine has that? B&S parts diagrams do not show that.
Thoughts????
#2
ILENGINE
ILENGINE
You have the Susa starter system. What I have found over the years with that system is the push handle has enough up and down movement when being pushed that it will move the starter pawls enough to make contact with the starter cup making all kinds of racket some times.
#3
A
Auto Doc's
A
Auto Doc's
The starter head portion needs to be replaced. The pawls are hanging and not fully retracting.
#4
M
Montecore
UPDATE:
I watched this video on Honda Briggs SUSA STYLE Starter repair
made sure everything was clean and dry. I roughed up the very smooth center bolt then reassembled.....that only thing different is 1 of the 2 black plastic spikes that the prawl rides in was broke. Mine did not have springs originally so I took a 1/4" spring from a clickable pen and cut it down about to size to put tension against the friction plate. Put mower back together started first pull runs great when not moved....but now I realize the handle bar has some play up and down which moves the cord attached the bracket on the right side of handle that's when you hear the squeal periodically when the handle is being moved. Maybe the prawls are not fully retracting for some reason?
M
Montecore
Thanks for the quick reply. What do you mean push handle up and down movement? Once the engine is running on concrete and if I pull the cord next to the left side of the handle I can induce the squealing noise. So I am thinking it must have something to do with the pawls not fully retracting for some reason. The original did not have pawl springs so I added to short springs for increase tension of the pawls on the friction plate. So maybe the broken black plastic spike sticking on where the pawl sits is causing that one side to fully retract? How do stop the squeak?You have the Susa starter system. What I have found over the years with that system is the push handle has enough up and down movement when being pushed that it will move the starter pawls enough to make contact with the starter cup making all kinds of racket some times.
UPDATE:
I watched this video on Honda Briggs SUSA STYLE Starter repair
#5
M
Montecore
UPDATE:
I watched this video on Honda Briggs SUSA STYLE Starter repair
made sure everything was clean and dry. I roughed up the very smooth center bolt then reassembled.....that only thing different is 1 of the 2 black plastic spikes that the prawl rides in was broke. Mine did not have springs originally so I took a 1/4" spring from a clickable pen and cut it down about to size to put tension against the friction plate. Put mower back together started first pull runs great when not moved....but now I realize the handle bar has some play up and down which moves the cord attached the bracket on the right side of handle that's when you hear the squeal periodically when the handle is being moved. Maybe the prawls are not fully retracting for some reason?
M
Montecore
Thanks for the quick reply. What do you mean starter head portion? Is that the pulley, prawls, springs, friction plate? Once the engine is running on concrete and if I pull the cord next to the left side of the handle I can induce the squealing noise. So I am thinking it must have something to do with the pawls not fully retracting for some reason. The original did not have pawl springs so I added to short springs for increase tension of the pawls on the friction plate. So maybe the broken black plastic spike sticking on where the pawl sits is causing that one side to fully retract? How do stop the squeak?The starter head portion needs to be replaced. The pawls are hanging and not fully retracting
UPDATE:
I watched this video on Honda Briggs SUSA STYLE Starter repair
#6
ILENGINE
ILENGINE
When the handle bar moves up and down it pulls the starter rope out slightly which causes the starter pawls to extend enough to contact the rotating starter cup. Some push mowers have a metal band crimped to the starter rope that acts as a stop for the rope retracting into the starter housing. Some times that metal band will slip instead of keeping a slight amount of slack in the starter rope between the engine starter and were it connects to the handle barThanks for the quick reply. What do you mean push handle up and down movement? Once the engine is running on concrete and if I pull the cord next to the left side of the handle I can induce the squealing noise. So I am thinking it must have something to do with the pawls not fully retracting for some reason. The original did not have pawl springs so I added to short springs for increase tension of the pawls on the friction plate. So maybe the broken black plastic spike sticking on where the pawl sits is causing that one side to fully retract? How do stop the squeak?
UPDATE:
I watched this video on Honda Briggs SUSA STYLE Starter repair
made sure everything was clean and dry. I roughed up the very smooth center bolt then reassembled.....that only thing different is 1 of the 2 black plastic spikes that the prawl rides in was broke. Mine did not have springs originally so I took a 1/4" spring from a clickable pen and cut it down about to size to put tension against the friction plate. Put mower back together started first pull runs great when not moved....but now I realize the handle bar has some play up and down which moves the cord attached the bracket on the right side of handle that's when you hear the squeal periodically when the handle is being moved. Maybe the prawls are not fully retracting for some reason?
#7
M
Montecore
That's a brilliant idea what can I use for a metal clip? So I just pull a little bit out like an inch that place the clip to keep the slack from the starter to the handle? Or would I need more then an inch?
1) Figure out a way to keep the bar from moving up and down if the cord is connected to the right side of bar
2) Remove the cord from the metal bar holder and once the engine starts let the cord recoil completely the top of the recoil then that eliminates any bar play up or down
What do you recommend?
M
Montecore
Now I am thinking one of 2 thingsWhen the handle bar moves up and down it pulls the starter rope out slightly which causes the starter pawls to extend enough to contact the rotating starter cup. Some push mowers have a metal band crimped to the starter rope that acts as a stop for the rope retracting into the starter housing. Some times that metal band will slip instead of keeping a slight amount of slack in the starter rope between the engine starter and were it connects to the handle bar
That's a brilliant idea what can I use for a metal clip? So I just pull a little bit out like an inch that place the clip to keep the slack from the starter to the handle? Or would I need more then an inch?
1) Figure out a way to keep the bar from moving up and down if the cord is connected to the right side of bar
2) Remove the cord from the metal bar holder and once the engine starts let the cord recoil completely the top of the recoil then that eliminates any bar play up or down
What do you recommend?
#8
ILENGINE
ILENGINE
Whatever you decide to use as a rope stop needs to be able to slide through the ring where the starter handle connects to the handle bar. Or like you said you can remove it from the handle bar and just reach down to start it and let it fully retract.
#9
M
Montecore
https://www.techsupportforum.com/threads/briggs-stratton-122l02-0111-f1-squeals-after-start.1263815/
M
Montecore
Ok think I finally figured it out with ILENGINE for lawnmowerforum.com....I always like to give credit where credit is do. It appears the Susa starter system has this problem when you push on the handle bar it moves up and down which in turn pulls the cord in an out of the recoil eyelet that causes the prawls to come out making the horrible squealing noise. So I made a knot in the cord that allows just a little slack in the cord from the card handle to recoil eyelet and perfecto no more squeal with the handle bar moves up and down as the cord slack compensates for the movement and the knot does not allow any movement of the cord to activate the prawls. Thank you all for your amazing input....hope this helps others because I was going crazy trying to figure this one out! I tried to upload two pictures but the file was too large. You can see the pictures atYou have the Susa starter system. What I have found over the years with that system is the push handle has enough up and down movement when being pushed that it will move the starter pawls enough to make contact with the starter cup making all kinds of racket some times.
https://www.techsupportforum.com/threads/briggs-stratton-122l02-0111-f1-squeals-after-start.1263815/