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Honda Harmony HRM215 oil burn #4113372 06/02/16 12:31 PM
Joined: Feb 2008
Posts: 176
J
JMHC Offline OP
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Joined: Feb 2008
Posts: 176
Hey guys. I have a Honda HRM215, I think with the GXV140 engine. It's over 20 years old, and I've had it for about 8. It always runs great and starts with 1 pull. Lately, it smokes a little on cold start, but if I have to shut it down, as it spools down it smokes bad. It smokes bad on hot starts too. While it's running I don't see any smoke, but I smell faint burning oil. I put a new plug in and changed the oil in the fall, and I've only cut the grass 7-8 times this year. Already, the oil is down about 1/3 of the way on the cross hatching and the plug is covered in sticky black goop. Seems to me like it's starting to burn bad and is on the way out (I'm guessing valve seals). Since it runs so well, I'd love to get a few more years out of it...any idea what will help these motors reduce oil burn?


1998 Pontiac Trans Am
2015 Toyota Camry V6 XSE
2009 Toyota RAV4 4WD 2.5
Re: Honda Harmony HRM215 oil burn [Re: JMHC] #4113506 06/02/16 03:21 PM
Joined: Oct 2014
Posts: 310
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Atesz792 Offline
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What's the coldest temp you'll mow in?
Monogrades traditionally work well in OPE.
SAE30 would serve you well and reduce consumption.
SAE40 would reduce it even further if you don't mow in too cold.
HDEO's are generally a good idea, monograde or not.

Edit: if you store it in a heated garage, you can use heavier grades then ambient would allow. In scenarios like yours, startup temp is what matters the most.

Last edited by Atesz792; 06/02/16 03:23 PM.

2004 Suzuki GS500F
2006 Renault Megane 1.5 dci
Re: Honda Harmony HRM215 oil burn [Re: JMHC] #4113514 06/02/16 03:30 PM
Joined: Sep 2004
Posts: 8,656
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andyd Offline
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If it was a car engine, I would recommend new valve stem seals I would try a heavier oil 20 w 50 or straight 40. As long as the engine runs. It will run longer if you check the oil before every use. That should be done to all OPE. Yours will just need oil every time. You may have some luck with a solvent flush.


'16 Camry LE STP synth 0w20 and STP filter. the Fridge

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
Thick oil is better grin2
Re: Honda Harmony HRM215 oil burn [Re: JMHC] #4113516 06/02/16 03:33 PM
Joined: Feb 2008
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Pop_Rivit Offline
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Originally Posted By: JMHC
any idea what will help these motors reduce oil burn?


Pull it apart and see what's going on, and then go from there. Those little engines are extremely simple to work on and take apart. Then you'll know what you have.

Re: Honda Harmony HRM215 oil burn [Re: JMHC] #4113580 06/02/16 05:52 PM
Joined: Aug 2003
Posts: 12,357
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JTK Offline
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Is the air filter and breather system all good?

I have seen a few really high hour Honda GXs smoke a bit and still run like a top.


2019 Nissan Pathfinder SV
2017 Ram 1500 4x4, 3.6L.
2015 Nissan Versa 1.6 S
Re: Honda Harmony HRM215 oil burn [Re: JMHC] #4113600 06/02/16 06:20 PM
Joined: May 2005
Posts: 431
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heynow Offline
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Joined: May 2005
Posts: 431
Have you done a compression check?

A headgasket leak that allows combustion pressure into the crankcase will cause excessive oil consumption.


1991 Acura NSX
2010 X5 35d twin turbo diesel
2005 BMW r1200GS
Re: Honda Harmony HRM215 oil burn [Re: JMHC] #4113636 06/02/16 07:09 PM
Joined: Sep 2005
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Warstud Offline
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Try some Restore...it worked great on my lawnmower.

http://www.walmart.com/ip/Restore-4-Cyli...dingMethod=p13n

Re: Honda Harmony HRM215 oil burn [Re: JMHC] #4113638 06/02/16 07:09 PM
Joined: Dec 2011
Posts: 1,956
toneydoc Offline
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Just keep the oil topped off. At your burn rate, it will almost always have fresh oil and you will not need to replace the oil all at once as you will have done it along the way

Of course, you can tear down the engine and diagnose it.

Or you could go to Harbor freight and buy a new engine and replace it.


1994 Jeep 167k NextGen 10w30
2014 Camry 44k Castrol Magnatec 0w20
2018 Jeep Cherokee 8k Pennzoil Platinum 5w30
2014 HD Ultra 51k Mobil1 15w50
Re: Honda Harmony HRM215 oil burn [Re: JMHC] #4114168 06/03/16 10:35 AM
Joined: Mar 2008
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bubbatime Offline
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You never said what oil you are using? If it is synthetic, get it out of there. Replace it with fresh conventional SAE30. Don't fill it to the top of the dip stick. Fill it to the halfway point on the dipstick. These few simple steps cures smoking issues on a lot of engines. Of course, the engine is getting old and is likely getting tired, either tear it apart and fix it or live with it until you can buy another mower.


2019 Honda CRV 1.5T dealer bulk
2017 Chrysler Pacifica SuperTech synthetic 5W20
2013 Yamaha XT250 Valvoline motorcycle 10W40
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