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Old 10-09-2020, 08:42 AM   #1
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Tiffin Sitting for a year!

I have a Tiffin I am looking at , it has been sitting inside plugged into power with the climate control on.

Also been started once a month but not driven.

Please tell me what to look for besides getting the oil changed.

Thanks for any help

its a 2018
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Old 10-09-2020, 08:53 AM   #2
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Stale gas could cause lots of issues after running it for 30 seconds or less. Oil, filters, all should be replaced. Starting once a month is really hard on motors. Especially if they did not drive it or let the motor come completely to operating temp.
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Old 10-09-2020, 09:03 AM   #3
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Is it a diesel or a gasser? A gas motor will warm up from an idle if allowed long enough, a diesel will not. Diesel fuel also lasts longer than gas, so if it was diesel there is less chance of stale fuel. Either way I'd take it out for a drive and find a big incline and run it hard. That will tell you if the systems are still running right. Even so, still change all the filters.
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Old 10-10-2020, 07:05 AM   #4
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ask for the service records, should have been serviced every year for warranty.
allen and bonnie
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Old 10-10-2020, 11:44 AM   #5
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If itís been sitting for an extended period of time you may want to check the tires for cracking and the batteries. I purchased my rig after a year of sitting (not sure if it was plugged in) and I had to replace the tires and batteries within the first year. Also ask if the generator has been run. It should be run under load at least once a month. If it has not you may need to change the oil and filters on it as well. If it has Aqua Hot heating make sure that it too has been serviced.
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Old 10-11-2020, 07:50 AM   #6
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Sitting too long

Thanks for the great ideas, the batteries and the tires or good ones along with the others.

Thanks to all who responded

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Old 10-12-2020, 06:34 AM   #7
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As with any used car, take it to a good mechanic familiar with chassis make. He may be able to spot issues such as corrosion (eq. components under chassis, brake calipers, etc.). Test drive, with mechanic, would reveal wheel pulling tendencies, as well as other issues. Brakes are very costly to repair. Work in recommended repair costs into negotiated price if still interested.
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Old 10-12-2020, 05:01 PM   #8
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How many miles are on it?
I do not know why you would have to change oil and filters if it was within the normal oil change interval. I assume you are not worried about any internal damage otherwise you could draw an oil sample out of the crankcase and send it in for analysis.
Tires are within the recommended life of 7 years for motorhomes. Make sure they are aired up to spec and take it to a reputable dealer for their expert analysis. Tires are more difficult to recognize issues on if you are not familiar with their signs of potential failure.
My opinion is different than some of the others here, but you asked for it....
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Old 10-14-2020, 06:12 AM   #9
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Great idea, thanks.
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Old 10-14-2020, 06:26 AM   #10
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Pmoroney, Is it a gas coach or diesel?

And, which model?

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Old 10-17-2020, 06:47 PM   #11
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I imagine the majority percentage of motorhomes have sat for similar times. Ours must have at some point. It was 7 with 9800 miles prior to us owning it. We changed oil, filter, air filter...all the basics. New set of tires. We've now driven 14k miles of two years and haven't had a single issue. I wouldn't necessarily consider it a huge negative for the coach you're looking at.
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Old 10-17-2020, 06:59 PM   #12
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Originally Posted by TXTiger View Post
...Also ask if the generator has been run. It should be run under load at least once a month. If it has not you may need to change the oil and filters on it as well...
If it's a gasoline genny that has a carburetor you might was well as plan to have a genny service bring it back to life. Mine hadn't been run in years and needed a new carb, new fuel pump, new brushes, a new fuel hose back to the fuel tank, the plugs were original(!) so I replaced them... might not have needed replacement but I did.

Now if it's going into storage I disconnect the fuel pump intake hose and sbustitute a short piece that drops into a can that is sitting on the ground. I purchase a quart of "white" gas or lamp fuel and drop the hose into it and start the genny... I let the genny run through that quart and die from lack of fuel. That procedure fills the carb with pure gas... no additives, ethanol, or other crap that can plug the tiny, tiny jets in these tiny carbs...

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