lomcevac540T

My Feedback: (1)

I am just disgusted with this engine. I will get it taken apart soon to see that the problem is. I know it has very little compression again. The engine only ran about a minute and luckily was still on the runway when it happened. It's not locked up, and don't have any rough feeling to it. So I'm not sure what the issue may be. Either way, it is not going back into one of my airplanes.

captinjohn

Lomcevac, get someone to fix your Mintor 22 engine...it may end up being your favorite. Post more about it. Did you get it new or used? Help is out there, they just got to know more about details to figure out what needs doing. Best Regards, John

Cyberwolf

My Feedback: (4)

Lomecevac's engine happens to be a 33. Email is a much better place to talk about this Ronnie. Considering this thread is for the 22 Mintor.
Feel free to contact me any time so we can get to the bottom of what happened.
[email protected]

captinjohn

Karol, wanted to know the RPM of my Mintor 22. My friend checked the RPM with a new tack. The Idle was a low as 1450 & the High RPM was 8,230. This was on a mix of Red Line oil at 30-1 & the fuel was Pure-gas that was mixed last summer. Going to get some new of the same gas that's fresh & see what that does. Best Regards to all, John

karolh

Using a 32 :1 mix of 90 octane ethanol blended (E90) unleaded pump gas and Red Line at approx. 3,000' elev. my M22 spinning a Falcon 17x6 has a reliable idle at 1,900 and 7,600 rpm at WOT. At my club's flying field which is at sea level max rpm's are close to 8,000 rpm.

fgnn

Absolutely outstanding workmanship. What skirt clearance will the new piston have in the cylinder, also in the picture showing both pistons, which is the new one ??

Cyberwolf

My Feedback: (4)

The cylinders on the Mintor engine's are not true and can vary as much as .001, but I try to maintain .0015-.002 clearance if possible.
The new piston is the one on the left hand side.
I have seen some with as much skirt clearance as .008.

captinjohn

Just wondering, was the .008 skirt clearance caused by a tapered cylinder or a piston not uniform in dia? Or a combination of both the cylinder & the piston off dimensions? Thanks & Take Care

karolh

As I recall in the case of my engine it was the undersized piston that was the problem.

captinjohn

Karol, I may fly the Pro 260 today as it is warm here now. I have the carbon cleaned out & I plan to run it hard with not much idle time. I do not want the carbon to build up. May try Stilhl Ultra.

Cyberwolf

My Feedback: (4)

Its mostly piston clearance I have seen some taper in the cylinders but not enough to cause issue's

karolh

Capt,n, I really don't think that there is much difference between the Red Line you are presently using and the Stihl Ultra, but that's just my opinion.

captinjohn

It seems like Red Line Has some quick carbon build-up at 30-1 & 32-1 ratios. Maybe there is cleaner running oils???

captinjohn

I flew the Aeroworks Pro 260 with the Mintor 22 on it. I just pulled the cyl to see how it looked inside. It was ok except for some soft carbon that cleaned out real easy with acetone & a scotch brite pad. It ran real good today with the air temp in the high 70,s. Got 2 flights in then my friend Jack showed up & he flew 2 flights. I then put 2 more flights and it ran super good at all speeds. The Idle was so slow I had to trim it down...the thing just did not want to stop. The Idle was so slow it was unreal. Back home, cleaned the plane & checked the compression. It has more now...good bonus! Capt,n

karolh

Did you eventually pull your engine to see just what went wrong.

lomcevac540T

My Feedback: (1)

No, I haven't had time to get it apart yet, getting ready for Joe Nall this week.
I have been meaning to get back on here just to say that I am in no way blaming anyone for this happening. Richard has been nothing but helpful to me and I also recommended him to another friend of mine that is also happy with his work. I have just made the decision to retire this engine and replace it with something that will be reliable. It is on a Gee Bee Z and I really need an engine that I can rely on. I will get it apart soon because I will be putting a DLE 35RA on the Gee Bee. This plane has been built for almost four years and I have very few flights on it because of this engine.
I am curious as to what happened, and I may even try to make a new rod for it and get it running again. I will let you know what I find as soon as I know.
Ronnie

captinjohn

Well another nice day to fly RC here so we did. Got more real good engine runs & some practice for them 3 point landings. Jack flew his Carl G Extra 300 with a Supertiger .75 on it. I tuned it for him & it now runs great. SOME FUN ! John

grandstand

My Feedback: (290)

I have a mintor 38 ..piston is 12thousands too small ..no comp. new engine..everyone I talk to ,,no help

captinjohn

Try to get in touch with cyberwolf....he can make a new piston. good luck. Capt,n

the pope

That unfortunately is mintor in a nut shell . If you can do as captain said your lucky if not strip the carb , ignition and anything else you deem of value and throw the rest as far as you can off a bridge . At least you may get some satisfaction that way . Lucky you only have one , I have 2 . Cheers

grandstand

My Feedback: (290)

I did better than that..chalked it up as a loss and willed it to my kids ..some day it might be worth something to a collector
it sits in my trophy case ..cant figure it out..it was made in ITALY , im lucky to be married to a Day-go..she donest act or look like that engine...LOL ,,,,

the pope

Hi there GS , thats pretty funny . Pluss if she works your miles in front unlike your engine .Don't you like your kids ? Cheers the pope

karolh

Hi Ronnie,

I'm curious, dd you ever get around to opening up your Mintor to see what went wrong inside ??

Karol

lomcevac540T

My Feedback: (1)

Yes I did, the wrist pin keeper had came out on one side and the wrist pin had rubbed and scared up the cylinder. I just took the engine off, removed the carb, spark plug, and ignition for parts, the threw the rest away. I just got tired of messing with the engine, and it was pretty much useless at that point anyway. Ready to put this whole Mintor thing behind me. lol.
Ronnie

captinjohn

I think it may be a good idea to use Teflon buttons instead of clips. What do you guys think?

Regards Captain John