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Mower power not consistent


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#1 aevansgatech OFFLINE  

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Posted May 08, 2015 - 07:56 AM

Hey guys,

 

I'm noticing a few conditions on the YT16H that are bugging me. The engine seems to run strong, but I've noticed that with the PTO on, the blade speed seems to come and go. It will be running smoothly, then randomly increase power/noise/blade speed for 10-30 seconds at a time. It cuts alright even at the 'lower speed' but I think it should be running at the higher speed all the time. Would a loose belt cause inconsistent power? My 16 horses might not all be there?

 

Related to that, it can't quite get the grass all the way up the bagger so it clogs

 

Lastly, after a solid 45 minutes or so of mowing, the engine will surge sometimes. Does overheating cause surge? Do I need to run with a bit of choke?

 

I'm hoping a splash of Marvel oil will help recover some engine power


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#2 boyscout862 OFFLINE  

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Posted May 08, 2015 - 09:12 AM

Have you done a complete service of the machine? Clean the mouse nest out of the engine(they get in there every winter). You are also having problems that are probably related to crap in the carb. Run it for awhile with fresh gas and then try carb cleaner. Unfortunately the ethanol damages many fuel system parts. You may have to overhaul the carb. Good Luck, Rick



#3 aevansgatech OFFLINE  

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Posted May 08, 2015 - 09:46 AM

Thanks Rick,

I've did quite a bit of servicing on this one when I got it. Changed fluids, new fuel line, new air and fuel filters.

Haven't opened up the carb on it though since it was running strong since I bought it. I'm always scared to spray carb cleaner in there, but it would probably help

I also need to change the hydro oil as the reservoir looks like bacon grease it's so dirty. I wouldn't think that affects engine power or pto/mower though.
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#4 lyall ONLINE  

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Posted May 08, 2015 - 11:31 AM

I would check the mower deck bearings, the bearing in the pulleys and the PTO.


Edited by lyall, May 08, 2015 - 11:32 AM.


#5 propane1 ONLINE  

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Posted May 08, 2015 - 03:50 PM

I would check the belt going to the deck for slippage and check the belt idler to make sure its pulling tight, had that problem with my YT16H Ford a while back.  Noel


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#6 boyscout862 OFFLINE  

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Posted May 08, 2015 - 08:45 PM

Thanks Rick,

I've did quite a bit of servicing on this one when I got it. Changed fluids, new fuel line, new air and fuel filters.

Haven't opened up the carb on it though since it was running strong since I bought it. I'm always scared to spray carb cleaner in there, but it would probably help

I also need to change the hydro oil as the reservoir looks like bacon grease it's so dirty. I wouldn't think that affects engine power or pto/mower though.

You can add liquid carb cleaner to the gas and it will clean the bowl and passages. Good Luck, Rick


Edited by boyscout862, May 08, 2015 - 08:50 PM.


#7 aevansgatech OFFLINE  

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Posted May 11, 2015 - 08:23 AM

I would check the belt going to the deck for slippage and check the belt idler to make sure its pulling tight, had that problem with my YT16H Ford a while back. Noel


I ended up putting the idler pulley at its tightest location and the belt did tighten up some. Maybe it's just me but the idler pulley doesn't stay perfectly vertical, it tends to lean a bit..
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#8 KennyP ONLINE  

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Posted May 11, 2015 - 08:35 AM

I ended up putting the idler pulley at its tightest location and the belt did tighten up some. Maybe it's just me but the idler pulley doesn't stay perfectly vertical, it tends to lean a bit..

Sounds like some wear there!


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#9 aevansgatech OFFLINE  

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Posted May 17, 2015 - 04:15 PM

Ok the saga continues and gets a bit more confusing for me

The belt is tight, idler pulley in its 'tightest' position, and engine is running strong

Now the weird part.. When I turn right the belt speed really picks up and I get a great clean cut and even most of the grass to the bagged

When I straighten up or turn left the belt speed slows down and I get a lousy cut. No kidding

Not sure where else to look!

#10 Rock farmer ONLINE  

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Posted May 23, 2015 - 06:03 PM

Sounds like electrical problems to me.
I would check the wire to the pto, to see if it is grounding out somewhere.
Pictures always help!
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#11 aevansgatech OFFLINE  

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Posted May 23, 2015 - 06:25 PM

Good idea Rock, I'm just not sure what to take a picture

I'll check the PTO wires

#12 Rock farmer ONLINE  

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Posted May 23, 2015 - 07:33 PM

I'd take a general picture. Front left, right rear, front on mower deck, and pto.
It may be easier to just jump out the pto wire.
Some times you just can't see the short!

#13 skyrydr2 OFFLINE  

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Posted May 24, 2015 - 06:36 AM

Sounds to me like the deck is not on correctly and when you turn your tightening up the belt because the deck moves and tightens the belt. Make sure it's installed correctly and the belt is routed proper from the pto. I doubt it's electrical, as the pto clutches will screech something wicked if they slip.

#14 KennyP ONLINE  

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Posted May 24, 2015 - 06:42 AM

Since this is a vertical shaft tractor, maybe the steering is making contact with the pulleys or belt?



#15 aevansgatech OFFLINE  

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Posted May 31, 2015 - 07:43 PM

So I tried troubleshooting the belt, pulleys, alignment, etc and came to the conclusion the 38" LT deck just doesn't work properly with the larger YT frame

It doesn't hang in the same spot/height and the rear isn't secure so it flops around

I found an affordable 48" YT deck and picked it up today!

Restoration on the new deck begins asap and the 38" will go back on the LT12H
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