Export thread

Rule out air filter issue?

#1

S

suomynona

I have a poulan pro lawn mower and it stalls out often. Now if I even begin to push it and cut it cuts out instantly.

My question is if taking off the air filter and running it results in the same problem, does that rule out needing a new air filter?


#2

M

mechanic mark

Absolutely not, engine needs to breathe. First check oil level on dipstick if it's overfull & smells like gas you have a carburetor problem. If oil level is ok check spark plug by removing & inspecting visually. Check fuel cap vent for being open & free of dirt. If your mower is over a year old you need to adjust valves with engine cold. Post engine manufacturer as well as all numbers from engine data plate.

No I did not miss your point, air filter should be replaced yearly unless you have dusty conditions then more often. Have you cleaned underside of deck & removed & inspected blade for cleaning, dressing up with a file & balancing blade. If your blade is buggered up & distorted it needs to be replaced. Model number is missing a number if B&S engine, six characters, model xxxxxx, type xxxx, trim xx & code number.


#3

S

suomynona

mechanic mark said:
Absolutely not, engine needs to breathe. First check oil level on dipstick if it's overfull & smells like gas you have a carburetor problem. If oil level is ok check spark plug by removing & inspecting visually. Check fuel cap vent for being open & free of dirt. If your mower is over a year old you need to adjust valves with engine cold. Post engine manufacturer as well as all numbers from engine data plate.
Click to expand...

I think you missed my point, I meant taking it off just for a few seconds and seeing if it does work then. I did check the oil properly today and its fine.

I might get a filter and find out its not the issue. That is why I asked this question, to possibly avoid that.

9PG02 0085 F1

DOM 0411 14

End.

Possible extra: 2514049

end.

I think this is the model number of some sort: PR500N21SH


#4

BlazNT

BlazNT

Yes removing it and testing it will let you know if you have an almost plugged air filter. But they are cheap and should be changed at least every year and more if in dusty area. A restricted air filter make engine run hotter. Something you will really not notice until it is very restricted and it starts over heating. So replace it often


#5

B

bertsmobile1

If the air filter is that badly choked, you would dissappear behind all that black smoke belching from the exhaust and the engine would sound like it had the choke on full.
The only thing that moves about when you push the mower is the oil in the sump, the fuel in the bowl and the fuel in the tank.
SO prime suspect is water in the fuel tank or carb bowl which sloshes when you move & gets sucked into carb.
No 2 suspect would be debris in the fuel tank, lines or bowl cutting off the fuel supply but that tends to have a lag after you push and worse when you stop pushing
No 3 suspect would be a loose wire / bare wire on the magneto cut out or as this is a push mower a control wire from the handle bars.

Overall poor performance could be a clogged filter, either type but neither should be sensative to movements.


#6

S

suomynona

bertsmobile1 said:
If the air filter is that badly choked, you would dissappear behind all that black smoke belching from the exhaust and the engine would sound like it had the choke on full.
The only thing that moves about when you push the mower is the oil in the sump, the fuel in the bowl and the fuel in the tank.
SO prime suspect is water in the fuel tank or carb bowl which sloshes when you move & gets sucked into carb.
No 2 suspect would be debris in the fuel tank, lines or bowl cutting off the fuel supply but that tends to have a lag after you push and worse when you stop pushing
No 3 suspect would be a loose wire / bare wire on the magneto cut out or as this is a push mower a control wire from the handle bars.

Overall poor performance could be a clogged filter, either type but neither should be sensative to movements.
Click to expand...

Thanks for the response. I would like to clarify, I meant by when I move the mower is the blades/engine are not just free spinning. In other words the pressure of cutting grass and using the engine's power is what shuts it off. If its just rolling on a flat surface there isnt a stall.

It doesnt seem to allow any use of the engines power but sometimes It would be working and stall like half-way through the lawn. It must be getting worse (what ever the issue is).

I didnt feel to enthusiastic regarding the air filter because taking the foam off doesnt prove any success. I figured if the filter is the cause then taking the filter off temporarily just to see would work but it hasnt.


#7

S

suomynona

mechanic mark said:
Absolutely not, engine needs to breathe. First check oil level on dipstick if it's overfull & smells like gas you have a carburetor problem. If oil level is ok check spark plug by removing & inspecting visually. Check fuel cap vent for being open & free of dirt. If your mower is over a year old you need to adjust valves with engine cold. Post engine manufacturer as well as all numbers from engine data plate.

No I did not miss your point, air filter should be replaced yearly unless you have dusty conditions then more often. Have you cleaned underside of deck & removed & inspected blade for cleaning, dressing up with a file & balancing blade. If your blade is buggered up & distorted it needs to be replaced. Model number is missing a number if B&S engine, six characters, model xxxxxx, type xxxx, trim xx & code number.
Click to expand...

I just shot a video of trying to start it here: https://youtu.be/CGqgjrNFcaY

It doesnt want to start even at a stand still at the moment, as you can see!

Spec: http://imgur.com/rV5sEdX

Filter: http://imgur.com/7RevITe

Update: Switched out air filter after cleaning, adding oil, ect. and I managed to do about half my lawn until it started stalling yet again. :(


#8

S

suomynona

suomynona said:
I just shot a video of trying to start it here: https://youtu.be/CGqgjrNFcaY

It doesnt want to start even at a stand still at the moment, as you can see!

Spec: http://imgur.com/rV5sEdX

Filter: http://imgur.com/7RevITe

Update: Switched out air filter after cleaning, adding oil, ect. and I managed to do about half my lawn until it started stalling yet again. :(
Click to expand...

Switched the spark plug now, still doesnt work..


#9

BlazNT

BlazNT

suomynona said:
I just shot a video of trying to start it here: https://youtu.be/CGqgjrNFcaY

It doesnt want to start even at a stand still at the moment, as you can see!

Spec: http://imgur.com/rV5sEdX

Filter: http://imgur.com/7RevITe

Update: Switched out air filter after cleaning, adding oil, ect. and I managed to do about half my lawn until it started stalling yet again. :(
Click to expand...

I finally looked at your pictures. You need to remove the engine cover and clean under it. I bet you will fine grass and dirt under it.


#10

S

suomynona

BlazNT said:
I finally looked at your pictures. You need to remove the engine cover and clean under it. I bet you will fine grass and dirt under it.
Click to expand...

So the plastic outside on top off? ps: why do you suspect that?


#11

BlazNT

BlazNT

I suspect that because the outside of the air box is covered with grass. Engine overheating can cause the issue you are having.


#12

S

suomynona

BlazNT said:
I suspect that because the outside of the air box is covered with grass. Engine overheating can cause the issue you are having.
Click to expand...

If you are talking about the airfilter picture I did replace the pull starter and dont recall any grass being under there. Ill see if I cant take a look sometime but im skeptical.


#13

BlazNT

BlazNT

Knowing that I think I'm barking up the wrong tree.


#14

S

suomynona

BlazNT said:
Knowing that I think I'm barking up the wrong tree.
Click to expand...

Naw, I appreciate the help :)


#15

B

bertsmobile1

I hear an engine that starts up on the low speed jets then runs out of fuel.
Get a can of starting fluid and once started give it LITTLE SHORT shots of starter fluid.
If you can keep it running like taht for a minute or so then shut it down and clean the carb.
The main jet is cloggd or the fuel supply is insufficient.


#16

S

suomynona

bertsmobile1 said:
I hear an engine that starts up on the low speed jets then runs out of fuel.
Get a can of starting fluid and once started give it LITTLE SHORT shots of starter fluid.
If you can keep it running like taht for a minute or so then shut it down and clean the carb.
The main jet is cloggd or the fuel supply is insufficient.
Click to expand...

was able to keep it running by clicking the prime button repeatedly. see if i have starter fluid might get it.


#17

B

bertsmobile1

suomynona said:
was able to keep it running by clicking the prime button repeatedly. see if i have starter fluid might get it.
Click to expand...

No need.
If you can keep it running by pressing the prime button, same thing, only better as it tells me the fuel supply to the carb is OK.
So that only leaves the main jet and venturi tube depending upon what carb you have fitted.
Assuming you misread the numbers and the engine is actually 9P602 0085-F1 the the pert you will need to clean or replace is 117 in the diagram linked to below
http://www.jackssmallengines.com/ja...es/09p600-to-09p699/09p602-0085-f1/carburetor

I thought you had already done this but I was confusing you with another current poster.


#18

S

suomynona

bertsmobile1 said:
No need.
If you can keep it running by pressing the prime button, same thing, only better as it tells me the fuel supply to the carb is OK.
So that only leaves the main jet and venturi tube depending upon what carb you have fitted.
Assuming you misread the numbers and the engine is actually 9P602 0085-F1 the the pert you will need to clean or replace is 117 in the diagram linked to below
http://www.jackssmallengines.com/ja...es/09p600-to-09p699/09p602-0085-f1/carburetor

I thought you had already done this but I was confusing you with another current poster.
Click to expand...

Thats what i was thinking thanks for reply


#19

S

suomynona

bertsmobile1 said:
No need.
If you can keep it running by pressing the prime button, same thing, only better as it tells me the fuel supply to the carb is OK.
So that only leaves the main jet and venturi tube depending upon what carb you have fitted.
Assuming you misread the numbers and the engine is actually 9P602 0085-F1 the the pert you will need to clean or replace is 117 in the diagram linked to below
http://www.jackssmallengines.com/ja...es/09p600-to-09p699/09p602-0085-f1/carburetor

I thought you had already done this but I was confusing you with another current poster.
Click to expand...

Update: I seem to have fixed it by blowing compressed air through the fuel lines and carburetor. I hope this remains working! thanks for all the help guys.


Footer Links 1

Top