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Anti rust coating for new mower deck #4755283
05/12/18 07:13 PM
05/12/18 07:13 PM
Joined: Jul 2014
Posts: 366
Ceciltucky Maryland
Oldtom Offline OP
Oldtom  Offline OP
Joined: Jul 2014
Posts: 366
Ceciltucky Maryland
My 10 year old Murray mower deck just broke in half from rust. The engine is running fine so I gave the whole thing to a local small engine guy/tinkerer. Maybe he can salvage the engine and mount it on another deck. Mowers rust out rather than wear out for me. Is there anything I can spray or brush on the underside of a new mower deck to resist rust? I thought of Fluid Film or wheel bearing grease, but thought it would be scoured off by the grass. Would spray undercoating or roof cement give a wear resistant surface?

Thanks in advance for any advice.

Re: Anti rust coating for new mower deck [Re: Oldtom] #4755297
05/12/18 07:31 PM
05/12/18 07:31 PM
Joined: Mar 2017
Posts: 5,718
...
PimTac Offline
PimTac  Offline
Joined: Mar 2017
Posts: 5,718
...
Keeping the underside clean is probably the best way and if rust appears then hit it with some Rustoleum


2017 Mazda CX-5 GT.

Valvoline Modern Engine 0w20
Mobil 1 EP 108A
Re: Anti rust coating for new mower deck [Re: Oldtom] #4755298
05/12/18 07:32 PM
05/12/18 07:32 PM
Joined: Oct 2012
Posts: 4,765
Taiwan
Ducked Offline
Ducked  Offline
Joined: Oct 2012
Posts: 4,765
Taiwan
For regular treatment, motor oil, perhaps mixed with diesel if you want to spray it (smelly though), or kerosene.

For longer term, Sunflower oil if you are not at all in a hurry. (off season?)
Boiled linseed Oil if you are still not in a hurry but don't have unlimited time.

Gets very sticky while its going off though. If you use it in that state I think a lot of grass might stick to it and be a pain to remove.

Once rust forms add a bit more veg oil and rub it in with aluminium foil, say at the end of the season. Builds up a good protective coating.

Last edited by Ducked; 05/12/18 07:36 PM.
Re: Anti rust coating for new mower deck [Re: Oldtom] #4755299
05/12/18 07:34 PM
05/12/18 07:34 PM
Joined: Oct 2017
Posts: 670
Georgia
MParr Offline
MParr  Offline
Joined: Oct 2017
Posts: 670
Georgia
The best thing to do is keep it clean. Rinse underneath with water after use. The accumulation of wet grass will do a number on a mower deck. After you rinse spay the business side of the deck with WD40 or another spray lubricant of your choice. This thin film of oil will help keep the clippings from sticking to the deck and it will be easier to rinse off.


2013 KIA Optima EX 2.4L. Now: QSUD 5W30 & STP S2808ML
2017 Ford Escape SE 2.0T Now: Mobil 1 5W30 & NAPA Gold 1348
Re: Anti rust coating for new mower deck [Re: Oldtom] #4755314
05/12/18 07:49 PM
05/12/18 07:49 PM
Joined: Aug 2003
Posts: 12,953
NE,Ohio
Rand Offline
Rand  Offline
Joined: Aug 2003
Posts: 12,953
NE,Ohio
no coating will hold up. get an aluminum,magnesium, or plastic deck


2019 Jeep Cherokee Trailhawk 2.0T
Re: Anti rust coating for new mower deck [Re: Oldtom] #4755326
05/12/18 08:03 PM
05/12/18 08:03 PM
Joined: Dec 2017
Posts: 2,469
SE British Columbia, Canada
Snagglefoot Offline
Snagglefoot  Offline
Joined: Dec 2017
Posts: 2,469
SE British Columbia, Canada
WD 40 Specialist Long Term Corrosion Inhbitor or perhaps PAM for an environmentally suitable solution?


If you want the job done right......do it yourself.
Re: Anti rust coating for new mower deck [Re: Rand] #4755339
05/12/18 08:17 PM
05/12/18 08:17 PM
Joined: May 2010
Posts: 9,169
North Carolina
spasm3 Offline
spasm3  Offline
Joined: May 2010
Posts: 9,169
North Carolina
Originally Posted By: Rand
no coating will hold up. get an aluminum,magnesium, or plastic deck


Or thicker steel.

I've not found anything that holds up.. Even graphite paint.


13 elantra 70k 5w30 QSUD
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Re: Anti rust coating for new mower deck [Re: Oldtom] #4755343
05/12/18 08:20 PM
05/12/18 08:20 PM
Joined: Dec 2002
Posts: 42,131
New Jersey
JHZR2 Offline
JHZR2  Offline
Joined: Dec 2002
Posts: 42,131
New Jersey
Do you store it outdoors?

I don't clean the deck regularly. I had the mower exposed for oil change and blade sharpening last weekend, and noticed there's starting to be a bit of surface rust when I removed the grass. It's still got many years left.

I plan to do a bit of cleaning now and again and apply FF when I think of it.

Re: Anti rust coating for new mower deck [Re: Oldtom] #4755347
05/12/18 08:26 PM
05/12/18 08:26 PM
Joined: Dec 2009
Posts: 288
Utah
ddtmoto Offline
ddtmoto  Offline
Joined: Dec 2009
Posts: 288
Utah
POR-15, pretty tuff stuff


Mustang GT 5.0 Brembo '11
ram 5.9
TL1000S
GSXR1000
DRZ400E
'09 GTZ1400 Concours
Re: Anti rust coating for new mower deck [Re: Oldtom] #4755367
05/12/18 08:48 PM
05/12/18 08:48 PM
Joined: Sep 2017
Posts: 251
One Step Beyond
MasterSolenoid Offline
MasterSolenoid  Offline
Joined: Sep 2017
Posts: 251
One Step Beyond
I just bought my first ever Riding Mower.
I will most likely over-maintain it like other stuff I own (1977 Ariens Snow-Thrower).

I used it for the 1st time today.
When I got done, I took the garden hose and blasted off all grass under the deck.
A strong stream of water really removes the grass.

They do sell jacks to raise the front of a riding mower so you can clean under them better.
Tomorrow I'm going to try jacking up the front with my hydraulic floor-jack (used for vehicle).
As long as it's SAFE to jack up, I can clean the deck alot better.

I figure if I can thourghly clean off the grass with a garden hose, I'll have a good chance
of keeping the deck rust-free
.

Oiling the deck in the Fall before putting away would be good.


2002 Ford Ranger
2 Wheel Drive
3.0 Liter Engine
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Re: Anti rust coating for new mower deck [Re: Oldtom] #4755382
05/12/18 09:06 PM
05/12/18 09:06 PM
Joined: Jan 2017
Posts: 327
NJ
JLawrence08648 Offline
JLawrence08648  Offline
Joined: Jan 2017
Posts: 327
NJ
I have a 48" walk behind I bought used. I grinder wire brushed the bottom, Rustoleum oil prime the bottom, then Rustoleum oil paint. Cut my small lawn, 30'x50', takes 3 minutes, after 5-8 cuts, the paint is gone. If you think of paint then think of POR-15, it is suppose to be super tough.

Re: Anti rust coating for new mower deck [Re: ddtmoto] #4755429
05/12/18 09:46 PM
05/12/18 09:46 PM
Joined: Apr 2012
Posts: 2,630
West Michigan
buck91 Offline
buck91  Offline
Joined: Apr 2012
Posts: 2,630
West Michigan
Originally Posted By: ddtmoto
POR-15, pretty tuff stuff


I treated a heavily rusted machete blade with POR-15 and tis held up fantastic! It should last a good, long time on a mower deck.


2011 F150 4x4 5.0L
1996 Mustang GT 5spd/ragtop
Re: Anti rust coating for new mower deck [Re: Oldtom] #4755432
05/12/18 09:49 PM
05/12/18 09:49 PM
Joined: Aug 2007
Posts: 1,795
.
Michael_P Offline
Michael_P  Offline
Joined: Aug 2007
Posts: 1,795
.
I dont know if you fertilize or not, but fertilizer is the arch enemy of mower decks, including non ferrous metal decks. Cut before you fertilize. Make sure the fertilizer had soaked in before next cut. Cut only dry grass.

Re: Anti rust coating for new mower deck [Re: Oldtom] #4755543
05/13/18 04:32 AM
05/13/18 04:32 AM
Joined: May 2005
Posts: 10,364
ROCHESTER, NY
Char Baby Offline
Char Baby  Offline
Joined: May 2005
Posts: 10,364
ROCHESTER, NY
After I scrape & clean and garden hose the underneath of my mower deck, I paint the undercarriage with used oil. I dip a brush in the pan of used oil and slap/slop it on. Once I'm done swatching on the oil, I run the engine for a few minutes.


"Retired"
-----------------------------------

'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'15 Nissan Altima 2.5 SV
'15 Honda Civic LX
Re: Anti rust coating for new mower deck [Re: Oldtom] #4755560
05/13/18 05:26 AM
05/13/18 05:26 AM
Joined: Jan 2011
Posts: 2,747
N.Ohio
Lubener Offline
Lubener  Offline
Joined: Jan 2011
Posts: 2,747
N.Ohio
Amsoil makes a good spray on rust inhibitor. Its waxy coating might last a couple years and you would have to clean it up and reapply. Rustoleum on a new deck will work too.Hosing the underside immediately after mowing is paramount and help the mulching abilities. Avoid used oil as that will attract and cause grass to build up creating a huge mess.


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