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Engine shut off loud rattle

#1

G

groeten

****Updated with Mower info***
I have a 2016 Hustler Raptor SD 54 Kohler 7000, Spec PS-KT740-3042 725cc, Serial 4601931503 mower, manufacture 03/2016 SN 934604, Hydro-Gear Model ZH-MCBB-3EMC-3PXX SN 6059D90011. When I shut the engine off, I hear a loud rattle around the engine or transmission. It sounds like there's play in the engine or somethings loose. It's very loud and lasts a couple of seconds. It doesn't sound like a loose bolt, but like the engine piston, etc. I believe it's gotten worse over the past few weeks. I'm worried it's something in the engine or transmission. But the engine runs good, no rattles from the engine or transmission when it's running. I change the engine oil once or twice a season with synthetic and the transmission with synthetic about 350 hours ago. I'm going to change the transmission oil next weekend. Mower has 450 hours. I couldn't find a thread that already discussed this symptom. Please help me.Thanks!!!!


#2

I

ILENGINE

It would help if you would of given us the engine information. Is this a Briggs, Kohler, Kawasaki, Honda or a 4 cylinder ford. Could also be an issue with the electric pto clattering on shutdown.


#3

B

Bertrrr

I worked on one and found the drive motors were missing some bolts, throwing belts and stuff, maybe look at your mounting hardware in that area


#4

StarTech

StarTech

And it would not hurt to give the actual model number of the mower (from serial tag). As Bertrrr mention there are thing that need to be looked related to drives. One thing the little two inch idler pulley tends to go bad bearing wise due it being over speed-ed by Hustler. Another is many of the Raptor tends to have loose or missing drive screws or simple have broken the mounting brackets. As mention by IL even the PTO clutch could be causing the rattle.

So it might be best the raise the mower rear end up and someone else shut the engine down while you looking and listening as to try to pin point the noise area.


#5

H

hlw49

Did you check the engine mounting bolts? If not please do.


#6

G

groeten

I updated the post with Hustler Raptor SD 54 Kohler 7000, Spec PS-KT740-3042 725cc, Serial 4601931503 mower, manufacture 03/2016.


#7

G

groeten

Thanks everyone. StarTech what do you mean with "loose or missing drive screws." Today I'll check for loose bolts and have someone turn off the mower while I have it jacked up to see if I can narrow down the sound.​



#8

StarTech

StarTech

groeten said:

Thanks everyone. StarTech what do you mean with "loose or missing drive screws." Today I'll check for loose bolts and have someone turn off the mower while I have it jacked up to see if I can narrow down the sound.​

Click to expand...
The hex head bolts are actually hex head screws. Just using the correct terms. Its just that over the years people started calling them bolts. So many types of screws out there is probably they started this to cut on the confusion what someone wanted.

Oh well off to get a couple shots that the docs insists on me getting.


#9

H

hlw49

A bolt is meant to be used with a nut, and it is tightened by torquing the nut. A screw is designed to be used in either a preformed or threaded hole, or it is capable of forming its own threaded hole. A screw is designed to be tightened by torquing the head.They are both threaded fixings and have a head for tightening the fastener but there is more to it than that. The most obvious way of differentiating between a bolt and a screw is that a bolt is not usually threaded all the way along its shank as it has a plain portion. A screw, however, is threaded fully to the head


#10

Tiger Small Engine

Tiger Small Engine

hlw49 said:
Did you check the engine mounting bolts? If not please do.
Click to expand...
Check engine mounting bolts. Torque and Loctite as needed.


#11

G

groeten

Thanks everyone. It was the engine mounting bolds. 3 were just a little loose, but that was all it took to make a loud rattle. Good thing I investigated the noise, because one of the transmission bolts that mount to the frame was just about to fall out. Put locktite on it. Thanks everyone for your help. Now on to figure out my oil leak.


#12

H

hlw49

Told you that was what it was. YW Glad you found the other bolts loose and got that fixed as well.


#13

Tiger Small Engine

Tiger Small Engine

hlw49 said:
Told you that was what it was. YW Glad you found the other bolts loose and got that fixed as well.
Click to expand...
I see loose engine bolts several times a year. Most of the time, the customer doesn’t even realize it. I remove bolts, clean them up, apply Loctite and torque.


#14

H

hlw49

I see them come in all the time with the engine so loose it looks like it could fall off any time. What do you torque them to?


#15

Tiger Small Engine

Tiger Small Engine

hlw49 said:
I see them come in all the time with the engine so loose it looks like it could fall off any time. What do you torque them to?
Click to expand...
I use a socket wrench and then apply a cheater pipe and use feel to tighten them. They are tighter than spec when I tighten engine bolts.


#16

S

slomo

Tiger Small Engine said:
I use a socket wrench and then apply a cheater pipe and use feel to tighten them. They are tighter than spec when I tighten engine bolts.
Click to expand...
:oops:


#17

F

Freddie21

Does that mean if it's threaded all the way and a nut is installed and tightened, it's a screw?


#18

J

Johner

StarTech said:
The hex head bolts are actually hex head screws. Just using the correct terms. Its just that over the years people started calling them bolts. So many types of screws out there is probably they started this to cut on the confusion what someone wanted.

Oh well off to get a couple shots that the docs insists on me getting.
Click to expand...
Could be a loose pully.


#19

J

Joed756

check for a loose blade or pulley.


#20

F

fish56

Joed756 said:
check for a loose blade or pulley.
Click to expand...
Tiger Small Engine said:
I see loose engine bolts several times a year. Most of the time, the customer doesn’t even realize it. I remove bolts, clean them up, apply Loctite and torque.
Click to expand...
Glad the poster found and corrected the problem before something serious happened.
One thing, a lot of you post to use loctite on screw threads. Good advice but please specify what kind of loctite.
There are many varieties for specific applications, but most common is the blue 242 which is for removable applications, red threadlocker that requires a torch heat to remove the fastener, and I also use bearing mount.
Google and learn.


#21

S

smallenginerepairs

check all bolts on the muffler. I just had one doing the same thing when shutting down the engine. and loose bolt holding the muffler to the frame was loose and when the engine wound down it would cause a rattling sound.


#22

H

hlw49

Yes The engineers a Hustlers are a bunch of idiots. Anybody that would bolt a muffler to the frame is not too smart. The engine and the frame flex differently. Have seen a lot of the Hustler mufflers break because of this.


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