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#4537927 - 10/09/17 11:41 AM Kohler v-twin engines
loneryder Offline


Registered: 04/19/14
Posts: 489
Loc: WV
Recently I saw a new Kohler v-twin engine on a zero turn with the oil pan off. Was surprised to see a plastic cam gear and plastic governor gear which had broken. It was a new machine. I've always liked Kohler engines but I won't buy an engine with plastic gears. The new Toro commercial v-twins have plastic cam gears. The new Briggs Commercial Turf does Not have plastic gears in it. Not sure about Kawasaki but don't think so.

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#4537938 - 10/09/17 11:50 AM Re: Kohler v-twin engines [Re: loneryder]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Two different Kohlers:

Command = Good
Courage = garbage

Which was it?

LOTS of small engine makers use plastic cams, even Briggs & Stratton.
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#4537962 - 10/09/17 12:32 PM Re: Kohler v-twin engines [Re: loneryder]
dave123 Offline


Registered: 01/13/09
Posts: 2315
Loc: wi
I like my Series 7000 on my Scag Z Turn

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#4538275 - 10/09/17 04:50 PM Re: Kohler v-twin engines [Re: loneryder]
cronk Online   content


Registered: 01/06/09
Posts: 1288
Loc: Watertown, New York
Almost every small engine is going to have a plastic (nylon) governor gear.
The plastic cam gear or cam would turn me off though.
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#4538765 - 10/10/17 07:14 AM Re: Kohler v-twin engines [Re: loneryder]
jeepman3071 Offline


Registered: 04/15/10
Posts: 4220
Loc: Storrs, Connecticut
Likely a Kohler Courage with plastic cam gears. One of the worst engines ever produced. I've seen the plastic cam gears break, head gaskets blow multiple times, oil leaks, bolts back out and smack the flywheel, and the blocks crack from weak metal.

Briggs single cylinder smaller engines (5-6hp or so) have nylon camshaft gears, but I haven't had any issues with those yet.
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#4538857 - 10/10/17 09:06 AM Re: Kohler v-twin engines [Re: Linctex]
loneryder Offline


Registered: 04/19/14
Posts: 489
Loc: WV
Originally Posted By: Linctex
Two different Kohlers:

Command = Good
Courage = garbage

Which was it?

LOTS of small engine makers use plastic cams, even Briggs & Stratton.

I don't remember but it was on a 60" Big Dog z-turn. I would say it was a Command. It was at the dealer and he was surprised to see that also. It was a new mower in his stock. He starts them to move them outside and lets them run for a while to warm up the oil.

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#4538868 - 10/10/17 09:26 AM Re: Kohler v-twin engines [Re: loneryder]
jeepman3071 Offline


Registered: 04/15/10
Posts: 4220
Loc: Storrs, Connecticut
Commands don't have plastic cam gears. The Courage engine is an overhead cam engine with the plastic gears.

Courage has replaced Command in a lot of applications because they are much cheaper. I see new zero turns all the time with these Courage engines, and other Chinese clones.

Courage cam gears:

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#4538875 - 10/10/17 09:31 AM Re: Kohler v-twin engines [Re: cronk]
boraticus Offline


Registered: 04/19/09
Posts: 2908
Loc: Canada
Originally Posted By: cronk
Almost every small engine is going to have a plastic (nylon) governor gear.
The plastic cam gear or cam would turn me off though.


That would be true.

My neighbour's lawnmower kept dangerously over-revving (B&S engine). Upon inspection the nylon governor gear had come apart.

I loath the idea of plastic internal engine parts and will go to great lengths to avoid buying anything with plastic internal parts.

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#4538898 - 10/10/17 09:46 AM Re: Kohler v-twin engines [Re: loneryder]
JTK Offline


Registered: 08/14/03
Posts: 10589
Loc: Buffalo, NY
Like said above, I don't care for the Kohler Courage single cylinder series of engines. Some aspects of the design are good, but the whole package is not. OTOH, I find the Courage V-twin series of engines to be good. I have not known anyone with them to have issues. I had one on a ZTR for a few years and liked the engine.
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#4539382 - 10/10/17 05:19 PM Re: Kohler v-twin engines [Re: boraticus]
cronk Online   content


Registered: 01/06/09
Posts: 1288
Loc: Watertown, New York
Originally Posted By: boraticus
Originally Posted By: cronk
Almost every small engine is going to have a plastic (nylon) governor gear.
The plastic cam gear or cam would turn me off though.


That would be true.

My neighbour's lawnmower kept dangerously over-revving (B&S engine). Upon inspection the nylon governor gear had come apart.

I loath the idea of plastic internal engine parts and will go to great lengths to avoid buying anything with plastic internal parts.


Even the legendary Honda GX engines use a plastic governor gear!
_________________________
1998 GMC C1500
2003 Chevy Cavalier
2011 Nissan Quest
1986 Pontiac Trans Am
1940 Ford 9N Tractor
Amsoil lubes and filters!

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#4539402 - 10/10/17 05:50 PM Re: Kohler v-twin engines [Re: JTK]
Ausfahrt Offline


Registered: 04/07/08
Posts: 1374
Loc: Fl & Vt
Originally Posted By: JTK
Like said above, I don't care for the Kohler Courage single cylinder series of engines. Some aspects of the design are good, but the whole package is not. OTOH, I find the Courage V-twin series of engines to be good. I have not known anyone with them to have issues. I had one on a ZTR for a few years and liked the engine.


+1
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#4539445 - 10/10/17 06:34 PM Re: Kohler v-twin engines [Re: cronk]
boraticus Offline


Registered: 04/19/09
Posts: 2908
Loc: Canada
Originally Posted By: cronk
Originally Posted By: boraticus
Originally Posted By: cronk
Almost every small engine is going to have a plastic (nylon) governor gear.
The plastic cam gear or cam would turn me off though.


That would be true.

My neighbour's lawnmower kept dangerously over-revving (B&S engine). Upon inspection the nylon governor gear had come apart.

I loath the idea of plastic internal engine parts and will go to great lengths to avoid buying anything with plastic internal parts.


Even the legendary Honda GX engines use a plastic governor gear!


What's this world coming to?

Seems Honda is prone to using plastic internal parts in some of their engines. That's disappointing. Nonetheless, their GX series engines are indeed legendary. Wonder how long they've been using plastic governor gears?

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#4539478 - 10/10/17 07:10 PM Re: Kohler v-twin engines [Re: loneryder]
ragtoplvr Offline


Registered: 01/14/15
Posts: 529
Loc: missouri
On the courage I think it is important to prefill the filter as full as possible per the instructions. They have no oil pressure until it fills.

I do know of one where the owner did not prefill his. Putting it on dry is good enough for his car, good enough for the mower. The rod parted company with the crank at about 100 hours. I got mine at the same time, it now has about 250 hours, it is 7 years old so has had 7 changes. Still seems good. That is still many hours away from acceptable. maybe I am just lucky.

Rod

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#4539531 - 10/10/17 08:05 PM Re: Kohler v-twin engines [Re: ragtoplvr]
JTK Offline


Registered: 08/14/03
Posts: 10589
Loc: Buffalo, NY
Do the Courage single cyl engines have full pressure lubrication? Most make/models don't. The oil pump just circulates oil through the filter. Some have top bearing pressure lube and splash lube for the crank end and con rod.


Edited by JTK (10/10/17 08:05 PM)
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#4539943 - 10/11/17 09:03 AM Re: Kohler v-twin engines [Re: boraticus]
jeepman3071 Offline


Registered: 04/15/10
Posts: 4220
Loc: Storrs, Connecticut
Originally Posted By: boraticus
Originally Posted By: cronk
Originally Posted By: boraticus
Originally Posted By: cronk
Almost every small engine is going to have a plastic (nylon) governor gear.
The plastic cam gear or cam would turn me off though.


That would be true.

My neighbour's lawnmower kept dangerously over-revving (B&S engine). Upon inspection the nylon governor gear had come apart.

I loath the idea of plastic internal engine parts and will go to great lengths to avoid buying anything with plastic internal parts.


Even the legendary Honda GX engines use a plastic governor gear!


What's this world coming to?

Seems Honda is prone to using plastic internal parts in some of their engines. That's disappointing. Nonetheless, their GX series engines are indeed legendary. Wonder how long they've been using plastic governor gears?



The Honda GC engines that have the overhead cam and use a timing belt have a plastic cam gear. I haven't seen any issues with it though, likely because it is connected with a belt.
_________________________
2000 Jeep Cherokee 4.0L (180k) - Pennzoil 10w30, Napa Gold 1516, Magnefine trans filter
2009 BMW 328i (32k) - Castrol Edge Euro 0w40, MANN HU816X

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