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PLEASE HELP!

#1

jdunn618

jdunn618

I got a 2004 Ariens Zoom34. I had the deck leveled etc. I was noticing odd level cuts, heard my engine might not be runnin fast enough. Turns out that & uneven tire pressure seems to be the blame. I have a slower time starting it btw also, but I noticed at idle & high idle it is okay (I even popped the air filter plastic off to check throttle movement from inside the carb). It works fine but only at running speed is the throttle actually wide open. When I put it in full throttle, the plate closes back up as the screw pushes & makes contact with the linkages on the carb. Here's a picture with throttle lever in the groove at running speed, again full throttle closes it back up & its bogs down or will die under blade running. Help

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#2

jdunn618

jdunn618

jdunn618 said:
I got a 2004 Ariens Zoom34. I had the deck leveled etc. I was noticing odd level cuts, heard my engine might not be runnin fast enough. Turns out that & uneven tire pressure seems to be the blame. I have a slower time starting it btw also, but I noticed at idle & high idle it is okay (I even popped the air filter plastic off to check throttle movement from inside the carb). It works fine but only at running speed is the throttle actually wide open. When I put it in full throttle, the plate closes back up as the screw pushes & makes contact with the linkages on the carb. Here's a picture with throttle lever in the groove at running speed, again full throttle closes it back up & its bogs down or will die under blade running. Help
Click to expand...
But I should add even when its open like this, it still doesn't seem to be running as high as it should. Carbs aren't hard to clean I know but why is it closing the flow & not running higher when I go to run full throttle


#3

Scrubcadet10

Scrubcadet10

So it sounds to me like your problem is dying out/ straining under load, i would remove the carburetor and clean it. specifically the main jet.
The butterfly valve doesn't have to open very much for a engine to reach full speed (about 3600 RPM) with no load.... Under load the governor may open the throttle more to compensate for the load.
Looks like a Kohler Command engine?


#4

jdunn618

jdunn618

Scrubcadet10 said:
So it sounds to me like your problem is dying out/ straining under load, i would remove the carburetor and clean it. specifically the main jet.
The butterfly valve doesn't have to open very much for a engine to reach full speed (about 3600 RPM) with no load.... Under load the governor may open the throttle more to compensate for the load.
Looks like a Kohler Command engine?
Click to expand...
Thank you will definitely clean it, but how come full throttle still closes the butterfly valve completely? That mostly is what's killing my power, otherwise at high idle/running speed engine is mostly ok when the butterfly valve is open. Just not full power it seems


#5

jdunn618

jdunn618

jdunn618 said:
Thank you will definitely clean it, but how come full throttle still closes the butterfly valve completely? That mostly is what's killing my power, otherwise at high idle/running speed engine is mostly ok when the butterfly valve is open. Just not full power it seems
Click to expand...
Its also a briggs 14.5hp engine, I can't find much on YouTube or online besides asking a forum about these


#6

StarTech

StarTech

What you looking at is the choke plate. The throttle plate is the one next the engine and not the air cleaner.


#7

jdunn618

jdunn618

StarTech said:
What you looking at is the choke plate. The throttle plate is the one next the engine and not the air cleaner.
Click to expand...
Well I popped off the carb to clean, choke plate/links seemed like they had lots of play when the throttle is lowest/mid. The screw on the choke plate coming off the throttle cable that pushes the choke links etc doesn't start pushing choke until its all the way full throttle. Then dies/bogs. Sounded good low/mid throttle but won't reach highest rpms as it closes the butterfly valve in the carb & seems to choke it out


#8

Scrubcadet10

Scrubcadet10

Will need the Model type and code numbers off the engine, they will be stamped into the OHV valve cover on the front of the engine


#9

B

bertsmobile1

jdunn618 said:
Also not sure why but everytime I go to find a replacement. I get this one exactly with a fuel shut off solenoid & mine is a Walbro carb that I can't even look up on their site! Idk if the person before me put a different carb on & bypass the solenoid, idrk. Im not slow but im also not an expert by far ??‍♂ Im so lost!
Click to expand...
because I can't remember the actual thread size I won't mention it but there is no difference internally between the solenoid & no solenoid carbs
So all you need is a bolt to hold the bowl on .
If no one chimes in with the thread ( think it is a fine pipe thread or conduit thread ) take the solenoid to a specialist nut & bolt shop & ask them for the shortest bolt in that size.
I got my from a gas ( LPG ) appliance shop by doing just that .


#10

jdunn618

jdunn618

bertsmobile1 said:
because I can't remember the actual thread size I won't mention it but there is no difference internally between the solenoid & no solenoid carbs
So all you need is a bolt to hold the bowl on .
If no one chimes in with the thread ( think it is a fine pipe thread or conduit thread ) take the solenoid to a specialist nut & bolt shop & ask them for the shortest bolt in that size.
I got my from a gas ( LPG ) appliance shop by doing just that .
Click to expand...
I appreciate that but its already set up like so. It just seems to be a different carb than oem but if you would please look at my follow up posts & see what it might be? Like I said its fine until full throttle then it closes choke i guess and butterfly valve. Not sure if its supposed to but I'd assume at full throttle it would be all open right is the choke links supposed to be loose also when it's not full throttle? Sorry not an expert


#11

jdunn618

jdunn618

Scrubcadet10 said:
Will need the Model type and code numbers off the engine, they will be stamped into the OHV valve cover on the front of the engine
Click to expand...
My apologies the engine says 15hp Kohler command and the mower frame says 14hp. Might have a diff engine but that's probably why I can't find the same part. Idk model # for engine is CV15S special # is 41526 and displ # is 426 idk what else is needed there's a couple more numbers


#12

jdunn618

jdunn618

I found the right parts the engine is different. The guy who sold it to me didn't tell me that, found the new carb online if I need. I just hope I can find better videos on adjusting the throttle, the cable is fine but still dies in full throttle as it STILL closes the valves as soon as it hits full throttle. Ugh


#13

jdunn618

jdunn618

Scrubcadet10 said:
So it sounds to me like your problem is dying out/ straining under load, i would remove the carburetor and clean it. specifically the main jet.
The butterfly valve doesn't have to open very much for a engine to reach full speed (about 3600 RPM) with no load.... Under load the governor may open the throttle more to compensate for the load.
Looks like a Kohler Command engine?
Click to expand...
Crankcase breather hose had big ole split in it, ordered new one & a carb since it was only $18- I been stressing with yards to do as I just started my own business. Is there any other reason it would choke out at full throttle if those don't work??


#14

Scrubcadet10

Scrubcadet10

Let me back up one step to be sure we're on the same page....
When you put it up to full throttle, which one closes, the one circled in Red or Blue?
carb213.png


#15

S

slomo

jdunn618 said:
Idk model # for engine is CV15S special # is 41526 and displ # is 426
Click to expand...
If this is a CV15S, I just worked on one. If I could get a wider picture of the carb linkages, might be able to help.

For the two linkages, one will push in at full throttle slash choke setting about an inch roughly, and only that much. That is your choke linkage. Other one should move in concert with the throttle lever. This latter one is your throttle linkage.

Far as the engine losing power at high revs, are the block and cooling fins clean? As in a new engine looking clean? Wondering if this one is overheating. Carb area is pretty filthy. What's under the metal engine cover? Bet the cover has never been off.


#16

R

Ranamow

Some tractors are set up to choke when the throttle is in full forward position. Once it starts, you must pull the throttle back to the run position.
Could this be part of your issue?


#17

M

mac

jdunn618 said:
I got a 2004 Ariens Zoom34. I had the deck leveled etc. I was noticing odd level cuts, heard my engine might not be runnin fast enough. Turns out that & uneven tire pressure seems to be the blame. I have a slower time starting it btw also, but I noticed at idle & high idle it is okay (I even popped the air filter plastic off to check throttle movement from inside the carb). It works fine but only at running speed is the throttle actually wide open. When I put it in full throttle, the plate closes back up as the screw pushes & makes contact with the linkages on the carb. Here's a picture with throttle lever in the groove at running speed, again full throttle closes it back up & its bogs down or will die under blade running. Help
Click to expand...
It sounds to me like that your throttle needs adjustment. It should be wide open at full throttle. Try pulling back on the throttle until the butterfly is wide open and then see how it runs.


#18

StarTech

StarTech

The engine design with auto choke. Also the engine disigned max RPM is 3000 rpm with an idle speed of 1400 rmp. In order to go any higher you need to remove the choke linkage and install a manual choke. In this case you need make up a bracket to hold the choke cable..


#19

S

skiman

Do you have a seperate choke lever or control? If not then pushing the full throttle all the way engages the choke flap for startup. Once running you pull back on the throttle till it runs smooth. That position is full throttle. Take a picture of your throttle and or choke setup on your ariens dash.


#20

jdunn618

jdunn618

Scrubcadet10 said:
Let me back up one step to be sure we're on the same page....
When you put it up to full throttle, which one closes, the one circled in Red or Blue?
carb213.png
Click to expand...
They both appear to close. The blue definitely but the red one pushes to the left direction also (if ur looking at the pic)


#21

jdunn618

jdunn618

Ranamow said:
Some tractors are set up to choke when the throttle is in full forward position. Once it starts, you must pull the throttle back to the run position.
Could this be part of your issue?
Click to expand...
Oh really? I never had a mower that does that, yea running position is fine but full forward throttle chokes it def. I just had uneven tires I think one is warped from someone over inflating it so my cut was off & since my deck was leveled & sharp blades I assume it was bc full throttle wasnt working in thicker grass when I tried to run higher. Thanks a lot! The tires are same psi now but still look odd shape on the right side. If odd cut level continues would the VERY SLIGHT difference in tire be my issue then?


#22

jdunn618

jdunn618

mac said:
It sounds to me like that your throttle needs adjustment. It should be wide open at full throttle. Try pulling back on the throttle until the butterfly is wide open and then see how it runs.
Click to expand...
It runs fine like that, I just didn't know some were set up to choke at fullest throttle I didn't know that! Thank you


#23

Scrubcadet10

Scrubcadet10

I think you may be pushing the throttle up too high.... This one probably has the All in one Choke/Throttle feature,... there is usually a detent that catches on the throttle handle when you've reached max throttle, and then from there up is choking it.


#24

S

slomo

Pictures would be nice here. And turn your phone sideways to get a wider shot.


#25

B

bertsmobile1

As I am not familiar with Zooms I had been staying out of this
However on the first photo I notice there is no return spring on the choke .
If you get a rebuild kit you will see there is a small clock spring that goes under the black plastic top
You notice there is a step at the front for anchoring the spring to
There is usually a small foam ring that goes over the whole shooting match.
You have to pull the choke butterfly out to replace the spring .
Without the spring most chokes will close at higher throttle opening due to the air rushing past same as an out house door in high winds .


#26

jdunn618

jdunn618

Scrubcadet10 said:
I think you may be pushing the throttle up too high.... This one probably has the All in one Choke/Throttle feature,... there is usually a detent that catches on the throttle handle when you've reached max throttle, and then from there up is choking it.
Click to expand...
Thats definitely it, had no idea I just was choking it as I've been so use to separate choke mower. Such a rookie mistake ? thank you. Hopefully I didn't actually mess up anything cable wise & if my cut is still leaving unevenness, would a slightly bulge tire be to blame as I believe the last guy over filled one side & the other was just low. Hope it cuts fine now but I start all this because of small uneven cutting thinking since deck was level etc it was a slow running problem & I had to run "fullest throttle" ?


#27

Scrubcadet10

Scrubcadet10

It's possible.... Is the bulge in the tread or sidewall?


#28

G

Gord Baker

If your mower is at operating speed in the photo, it appears the Throttle Plate is nearly closed.
Governor linkage can do that if there is a fuel problem (not enough gas). Try squirting a small amount of gasoline into the Carb when it is set for wide open and see if it revs up considerably. I think you may have fuel starvation problem and need to have the Carb disassembled and all passages cleaned. There are some very tiny holes in the emulsion tube and jets that you may need a wire from a wire brush to clean. Remember carefully how it is assembled and if new to this, take photos.
Work on a big clean surface with a towel underneath so items don't bounce away . Good Luck.


#29

jdunn618

jdunn618

Scrubcadet10 said:
It's possible.... Is the bulge in the tread or sidewall?
Click to expand...
Tread, its not super noticeable and the left side was low. Only reason I care so much is I'm pretty knowledgeable but also starting a lawncare biz so I want things working/looking mint


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