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Author Topic: Kohler 7CM21-RV generator  (Read 17741 times)

Offline Van

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Kohler 7CM21-RV generator
« on: July 05, 2012, 07:03:30 PM »
I have available to me right now a 7cm21-rv genny (serial #134213) that I am going to go see, does any one have any exp with this particular model gen? I am ready to step up another rung on the ladder so we can power up both the ac's at once. This would be strictly a trade even deal for my Honda EM-5000 noise maker, owner says the unit runs out fine Undecided Undecided Thanks Ya'll


   V-Man
« Last Edit: July 05, 2012, 07:47:45 PM by van »
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Offline gus

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Re: Kohler 7CM21-RV generator
« Reply #1 on: July 05, 2012, 08:15:16 PM »
Go online and see if you can find any comments about it, there is usually some good stuff on SS RV boards.

It looks like a noise buggar to me!!
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Online luvrbus

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Re: Kohler 7CM21-RV generator
« Reply #2 on: July 05, 2012, 09:26:21 PM »
Those are good generators 1800 rpm uses about 1/2 gph of gasoline under load Sonja said ,the motor home you seen in my shop has one  

I thought all these years since 1985 it was a Onan lol not very loud either 2328 hrs showing on the hr meter and Sonja said she never spent a dime for repairs except for oil changes and air filters

 I may go fire that baby up before leaving for Scottsdale just for fun it is the same unit as you posted she ran 2 AC's and the microwave with out problems  

Update Van she did find a bill for $58 upgrading the engine to soild state from the old points system 58 bucks at Camping World unheard of today lol
« Last Edit: July 05, 2012, 09:36:35 PM by luvrbus »
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Offline Van

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Re: Kohler 7CM21-RV generator
« Reply #3 on: July 05, 2012, 09:40:55 PM »
That's good hear Cliff, just spoke to the small engine guru in town, said the same thing, thanks!
Gus, thanks..but I am a retired Army Tanker, I d ;Don't hear that well anywho lol!
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Offline goutoe

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Re: Kohler 7CM21-RV generator
« Reply #4 on: July 05, 2012, 10:05:41 PM »
My kohler generator is very similar not sure of the model no. Mine runs on propane, I have had no problems, It runs great and runs both of my air conditioners, as well as any thing else in the bus, John.
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Offline Van

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Re: Kohler 7CM21-RV generator
« Reply #5 on: July 05, 2012, 11:54:29 PM »
Oh well, the owner upped the anty and wanted 3oo cash on top of the trade and I declined.
Ya know that funny tingle ya get when a good deal is ;D about to happen? It wasn't

Thanks yall, mybe next time!
Ex 1989 Model 15 Predator class War Bird owner

Offline thomasinnv

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Re: Kohler 7CM21-RV generator
« Reply #6 on: July 06, 2012, 02:12:26 AM »
offer him 150 and see if he bites.
Some are called, some are sent, some just got up and went.

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Offline Dave5Cs

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Re: Kohler 7CM21-RV generator
« Reply #7 on: July 06, 2012, 05:35:28 AM »
We have a 15 KW Koler and it runs everything including both A/C's and the Microwave at the same time. That should be a good one too. Koler makes great things.

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Offline Bussman84

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Re: Kohler 7CM21-RV generator
« Reply #8 on: July 09, 2012, 01:05:16 AM »
A couple days late i know (story of my life! LOL) But just in case something comes around and you find yourself back looking at this unit again, it is the same unit I mounted in our MC-9. Not overly noisy plenty of power for 2 roof a/c's and microwave. I have no complaints. Also I have all the manuals for this model if you might need some info. Hope this might help.


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1961 Int. Skoolie 345v-8 w/4spd.
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Offline Van

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Re: Kohler 7CM21-RV generator
« Reply #9 on: July 09, 2012, 03:29:52 PM »
Thanks Billy, that is good to know. I do have a goal, and getting there will be the toughest part. I have had good luck with our Honda (EM-5000 portable), which had served it's purpose admirably as a portable unit, but now is the time for me to climb one more rung up the ladder and get something more suited for the bus. My goal is to eventually have a 10,000Kw diesel unit, which I cannot afford at this time but will hope to make the transition to an 1800rpm unit capable of running the 2 ac units and have some left over for my other accoutrements ;D the unit I was looking at seemed to fit that bill, but for the owner of said unit a little price gouging seemed to be in order, so I walked ( I can be stubborn too  ;D ) away from the deal. But thank you for the response ;) :)

    V-Man
Ex 1989 Model 15 Predator class War Bird owner

Offline Van

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Re: Kohler 7CM21-RV generator
« Reply #10 on: July 15, 2012, 12:48:57 AM »
Thanks to some good advice I decided to go ahead and make the deal for the 7kw Kohler. went and took a look at it, it ran flawlessly and produced good power under load, now to rewire the bus for 50 amp service. Thanks all for the advice!

Ex 1989 Model 15 Predator class War Bird owner

Offline lostagain

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Re: Kohler 7CM21-RV generator
« Reply #11 on: July 15, 2012, 01:14:45 AM »
Van, I am happy for you. This will keep you occupied for a few days, LOL. Won't that run 2 ACs? I have a 7.5 Honda in mine and it runs both airs. I bet that is the last generator you buy for a while.

JC
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Online luvrbus

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Re: Kohler 7CM21-RV generator
« Reply #12 on: July 15, 2012, 01:22:14 AM »
Good for you Van one thing I see missing the seal around the oil filter they need that, it helps in forcing the air through the fins on the head for cooling just so you know buddy
Life is short drink the good wine first

Offline Van

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Re: Kohler 7CM21-RV generator
« Reply #13 on: July 15, 2012, 04:51:26 AM »
Thanks Clifford, I got one for it, pulled the old one out it was dried up.
JC , Yeah for a few days, I already sent parts to the chrome r  :o ;D
 This is a good start so that I can finally get rid of that yucky 30 amp ;D But this is just the beginning, 100amp is the eventual goal but this is an improvement. I got no muffler for it (need one :'( ) was thinking up-swept fish tails :o , kinda sounds like a sporty now with drag pipes (bus :o) Whaddya think? LOL!

 Feeling all tingly now! ;)
   V. ???
« Last Edit: July 15, 2012, 05:15:06 AM by van »
Ex 1989 Model 15 Predator class War Bird owner

Offline Bussman84

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Re: Kohler 7CM21-RV generator
« Reply #14 on: July 15, 2012, 12:41:24 PM »
Van that's great! I beleive you'll be happy with it at least until you get the opportunity to upgrade to the diesel unit. Like I said before same one we're using and have several different manuals for it if you need any info. I'm not real savy on uploading that kind of stuff to the computer but I will do what ever I can to help if needed.


              Best of luck, Billy
1961 Int. Skoolie 345v-8 w/4spd.
1979 MC-9 8v71 HT740
Southcentral, Kansas