You Will Love the MCH6
- I recently bought this older Aerotecnica Coltri MCH-6 and it runs as good as a new one. Here's a picture of my MCH-6:
- I also have 3 diving buddies who each have the MCH-6 in MaxAir 35 branding. They all love their MCH-6s and have had zero problems with them in 3-4 years of heavy use. These guys each dive 40-100 dives a year and fill some of their friends tanks as well as theirs. I recently bought a used Aerotecnica Coltri MCH-6 after my friends showed me how their MaxAir MCH-6 machines function. Mine is quite a bit older than theirs but it works the same and as well as a new machine:
- Here are the advantages I see to the MCH-6:
1. Proven 4-Stage pump. Four stages give a better compression ratio than 3 stage pumps. This means it runs cooler than a three stage for the same amount of work. I say "proven" because I think this is the same four stage pump they've been making since the even older days when it was called the Olmeva 6000.
2. Actual Free Air Delivery CFM... Meaning the fill rate cubic feet per minute is rated from 0 psi to full, not "SCFM" which is 500 psi to full.
3. Easy maintenance: It's easy to open the filter tube and pop up the filter cartridge to check the blue test strip. It's easy to check the oil and top it off or change it.
- Personal experience... My little Aerotecnica is probably similar to the "EU" version of the Compact MCH-6. I bought it used. It had been in storage awhile but turned over fine. The motor started with a prime of fuel in the spark plug hole but wasn't getting fuel to keep running. I took apart the gas tank and carburetor, cleaned corrosion and gunk from the gas tank, cleaned the filter screens. But it still wouldn't suck up the fuel and keep running. Then I put new, TIGHTLY Clamped hose clamps on the vent tube. One pull on the cord and she was running perfectly. I filled a Scuba tank from 0 psi to full at a rate of 2.93 cfm. The current EU model specs say it runs 3.2 cfm... Mines running just as good or close enough!