Coltri MCH-6

 I bought mine two years ago and I've had no problems. Still runs like it's brand new.

I have the Daystate Type 2 version and it runs like a top.

Thank you for this post, as I was wondering this myself. This will certainly be my next major purchase. I have searched high and low and cannot find a used one for sale, that says a lot.

its a great unit for mobility...

I can talk about compressors for hours. Having been in the professional side of the scuba industry for over 3 decades, I can summarize this view in just a few words.

If you get a compressor that has proven itself within the diving industry, you can't go wrong.

The Coltri line is a good line of compressors. They have crossed over into the HPA world of PCP airguns and have found a good fit with the end consummer with the MCH6.

There are others but the OP askd about this one. Dive safe and shoot straight!  

I'm a year and a half in; so far on issues to date, stills fires right up and finishes fast..

I have owned both a gas and now an electric version of the MCH-6. It’s is one of the easiest to work on and you do get what you paid for. Like others have said above. Just oil change and it just keeps on going. My electric version is just passed 66 hours of use. 

I have had mine for about 1 year now, I have NOT had a single problem or worry, I get face cramps from smiling. I should go do my 1st oil change. I don't have the 50hrs run time yet but I am a firm believer in annual oil changes for machines that do not get to the hrs of run time to need more frequent oil changes

I have not read of any regrets about buying the Coltri MCH-6, I am very happy with mine

 

I have MCH-6 two years now. Had some problems with gun so have not used it much. Less than 10 hours. Electric 220v version. I had the gauge leak all its fluid out for some reason. I called coltri, they said this happens all the time. The rubber plug fails and leaks the oil, the gauge still works perfect without any oil. They said I have to buy the new gauge at $65.00 because I was 2 months out of warranty. Kinda surprised about that, because the girl told me it happens all the time. Disappointing for sure. I will only buy a new gauge if I ever sell the unit, it works fine. Love mine the times I have used it.

Wish they would offer the 220 volt version at the same price, I'd be all over that. I'm guessing that ain't happening unfortunately.

Had the top head leak air and the electric motor died. Luckily all under warranty.

Wish they would offer the 220 volt version at the same price, I'd be all over that. I'm guessing that ain't happening unfortunately.

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Call Nuvair and ask. The 220v is about the same price as the gas version ($2500). At least it was when I got mine a little over a year ago. No problems with mine but it does make an unpleasant noise (almost like a scraping sound?) when I run it hard for multiple tank fills. These days I let it rest 30 minutes after filling each air tank and no unusual sounds.

Have mine 3 months about 6hrs . no problems

Thanks to you all for the info on this compressor. It’s been on my radar for awhile I feel much better after reading all the comments. My one question is get the gas version or the electric version? Does anyone know if there is really any difference? Thx

My advice would be remove the cage completely when changing the oil, apart from that the DAYSTATE unit (which is not exactly the same as the COLTRI original) is brilliant!

The owner of DAYSTATE and the owner of COLTRI are friends hence the competitive price of the DAYSTATE unit which has extra features over the COLTRI original, the COLTRI distributor here in the UK could not match the price of the DAYSTATE badged unit even though it has the extra features, a first if I ever saw one!

Gas or Electric...that is a good question.

And the answer is.....personal choice.

If you really need portability and are going to be filling many tanks at a remote location...go gas.



For me it is the Electric, and there are several factors that affect that answer. Mainly I don't need portability, I have my 100cuft tank(s) for that. Personally I prefer to run my compressor in a environmentally controlled area, such as my air-conditioned house or shop. With a gas model, you can't do that safely due to the exhaust. By using (air-condirioned) cooler air to begin with in the summer, there is less moisture that has to be removed. Low Temperature and low humidity air will help make your compressor last longer. There are two things that kill compressors, heat and moisture. Also I prefer to pump out Grade E or Grade D breathing air quality compressed air. Kinda works out, what is good for Scuba breathing air is also good for airguns. The more I can do to prevent moisture build up in my gun as well as particulate, the better. So I prefer the 220V electric with Grade D minimum filter cartridges in the filter tower on the Coltri MCH-6. If I was using this compressor for filling tanks for diving, I would also get it tested. Use to cost me around $35 to get a sample sent to the labs to be tested. Good insurance when diving and still not a bad idea for airguns....but a little over-kill. 

I will also share a bit of wisdom that was passed down to me years ago on running scuba compressors that applies to us air-gunners as well.

When you are filling your tanks, don't shut off the compressor when it is running and pumping at high pressure....when your tank gets full, shut the valve on the tank, and open the drain valves on the water separators, while the compressor is still running. Allow the compressor to continue to run while the pressure of the compressor output drops down to less than around 50 Bar (approx 735 psi) or all the way to zero if you like. This will allow the compressor to do two things....cool down a little, as the only oil circulation on these lower end compressor units is a slap paddle system, and of course the fan is still running, but it also helps the reduce the load on the pistons and valve system before being shut down abruptly in mid-stroke. Happy diving and safe shooting.

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