Husqvarna TS348XD is leaving large brown patches on my lawn! - MyTractorForum.com - The Friendliest Tractor Forum and Best Place for Tractor Information
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post #1 of 16 Old 06-09-2019, 12:39 PM Thread Starter
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Husqvarna TS348XD is leaving large brown patches on my lawn!

I have been noticing large areas of brown patches (dead grass) on my lawn the last couple of mowings. First I thought maybe a gas leak, but no gas odor, then someone said it may be from the muffler.

They show up the next day after mowing, in the spot where I left the mower idling for 1-2 minutes.
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post #2 of 16 Old 06-09-2019, 03:35 PM
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Re: Husqvarna TS348XD is leaving large brown patches on my lawn!

Yup, it's likely heat from the muffler/exhaust. Had the same thing happen with my zero turn, when it would sit on the grass while I was emptying the bags of grass.
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post #3 of 16 Old 06-09-2019, 05:23 PM
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Re: Husqvarna TS348XD is leaving large brown patches on my lawn!

Got a pic of your exhaust? Is the heat shield in place? Is exhaust leaking from a gap in the muffler?
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post #4 of 16 Old 06-10-2019, 01:41 AM
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Re: Husqvarna TS348XD is leaving large brown patches on my lawn!

Just to follow up, the exhaust on my zero turn is about 8-10" off the ground, with the exhaust port on the bottom, pointing backwards (the "port" looks like the B&S screw on exhaust direction cover, like the one for this exhaust https://www.ebay.co.uk/p/Muffler%2DE...79699254&rt=nc)

It likely doesn't help that the cooling airflow over the engine goes downward, so at least some of it would blow down over the exhaust, then towards the ground.
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post #5 of 16 Old 06-10-2019, 12:15 PM Thread Starter
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Re: Husqvarna TS348XD is leaving large brown patches on my lawn!

The exhaust shield measure 9" from the floor.
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post #6 of 16 Old 06-10-2019, 01:36 PM
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Re: Husqvarna TS348XD is leaving large brown patches on my lawn!

Quote:
Originally Posted by jprzybilla View Post
I have been noticing large areas of brown patches (dead grass) on my lawn the last couple of mowings. First I thought maybe a gas leak, but no gas odor, then someone said it may be from the muffler.

They show up the next day after mowing, in the spot where I left the mower idling for 1-2 minutes.

I can confirm that with my Cub XT1 which may be similar (MTD) that I have the same issue with the heat from the muffler leaving brown patches. Took a few mows for me to figure it out, as I was thinking I must have spilled some gas or that it was leaking something.

Now I make sure to park it over the weeds or unwanted grass starting to come up through the gravel if I know it is going to be idling in place for more than a minute or so...
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post #7 of 16 Old 06-10-2019, 02:33 PM
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Re: Husqvarna TS348XD is leaving large brown patches on my lawn!

Had the same thing on my HQ tractor, crappy design...On the Husqvarna Rider the exhaust is high up at the rear so no such problems there.


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post #8 of 16 Old 06-10-2019, 07:38 PM
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Re: Husqvarna TS348XD is leaving large brown patches on my lawn!

Ok the shield and muffler look great, or normal. One more check to make sure your engine isn't getting real hot (causing a very-hot muffler): Would you be able to remove the cooling shroud on top of the engine to look for any signs of a mouse nest on top of a cylinder? I would say just look for signs, but it isn't always obvious from just looking from the outside.
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post #9 of 16 Old 06-10-2019, 10:06 PM
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Re: Husqvarna TS348XD is leaving large brown patches on my lawn!

since the exhaust is going forward it will not cause dead grass.. in the pic I see the deck near the bottom.. like the grass is scalped.. u may b mowin too low..


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post #10 of 16 Old 06-10-2019, 11:27 PM
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Re: Husqvarna TS348XD is leaving large brown patches on my lawn!

You didn't apply any Weed and Feed lately? That could cause brown spots. I have this weed that looks exactly like grass. This weed has a lime green color when it first comes up and usually in small 12 in diameter spots. When I apply my Scotts Weed and Feed, I notice it kills this weed that looks like grass. I see brown spots two days after I apply the stuff. I'm sure its not my muffler because that points out the side.

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post #11 of 16 Old 06-11-2019, 01:56 AM
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Re: Husqvarna TS348XD is leaving large brown patches on my lawn!

When your tractor is up to temp, park it and put your hand on the grass underneath the exhaust area and see how warm it feels.
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post #12 of 16 Old 06-11-2019, 10:02 AM
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Re: Husqvarna TS348XD is leaving large brown patches on my lawn!

I'm sure that it is heat from the engine causing the brown spots. There are lots of threads on this issue going back years. It's not limited to just one brand or model either.

Easy test... if it turns brown just where you stop for a while, it's not weed-and-feed. I don't use weed killer and still get brown spots if/where I stop. I say "if" cuz I learned not to stop in places where I don't want to damage the turf.

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post #13 of 16 Old 06-11-2019, 10:59 AM
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Re: Husqvarna TS348XD is leaving large brown patches on my lawn!

Quote:
Originally Posted by LLigetfa View Post
I'm sure that it is heat from the engine causing the brown spots. There are lots of threads on this issue going back years. It's not limited to just one brand or model either.

Easy test... if it turns brown just where you stop for a while, it's not weed-and-feed. I don't use weed killer and still get brown spots if/where I stop. I say "if" cuz I learned not to stop in places where I don't want to damage the turf.
the guy that get my Saber fertilize his lawn this spring.. he used a broadcast type.. he had clumps in it.. they left brown spots..


the round fenderd JD's
4-JD 60's.. 2-JD 70's.. 6-JD 100's.. 2-JD 110's.. 2-JD 112's..

3 JD LT 155's.. JD R-72.. JD Scotts 2048.. JD 111.. JD Sabre 1742..
WH RJ-58.. WH Lawn Ranger.. WH 654.. WH 854.. 2- MF 14's..
Craftsman GT 6000.. CC 70.. CC 100.. CC 129..
total tractors is 30..
home built log spliter 4x24 ram.. 20hp.. 11 seconds per cycle..

give a monkey a wrench & he can ruin the world.. whirly 7/27/2018
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post #14 of 16 Old 06-11-2019, 01:38 PM
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Re: Husqvarna TS348XD is leaving large brown patches on my lawn!

That looks like the same muffler and and heat shield that was on my polan pro. Did the same thing to my yard until I put a new muffler on it.

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post #15 of 16 Old 06-12-2019, 09:00 AM Thread Starter
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Re: Husqvarna TS348XD is leaving large brown patches on my lawn!

I'll check out these suggestions including restricted airflow. No fertilizer applied.
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