Is the Mark engine as good as the original Moki engines were? I am particularly referring to the 2.10.

They are the same except for the name

Yes, the engines are the same, except for the name.
The parts are all interchangeable.
The 2.10 is a SUPER-DYNA-WHOPPER!!!
JC AMA 3042

Thanks. I just wanted to be sure it was not a cheap "knock-off"

What is your favorite blend o glow fuel for your Moki engines? Thanks Capt,n

What is your favorite blend o glow fuel for your Moki engines? Thanks Capt,n
[/quote]

I will be using Cool Power FAI

Quote: "What is your favorite blend o glow fuel for your Moki engines?" Thanks Capt,n

Hi Capt,n
I normally run Powermaster 5% with a synthetic/castor blend.
The Moki/Mark engines will run OK on straight FAI (80% methanol, 20% castor oil), but it's gooey and a mess to clean-up your airplane. In cold weather it's a real chore to clean the castor off your model. My favorite fuel is 75% methanol, 5% nitromethane, 15% synthetic oil, and 5% castor oil. The 5% nitro will give you more power and improve your idle and throttle response. The synthetic/castor blend is much easier to clean off your airplanes....and it doesn't create as much varnish and gum in and on your engines as does straight castor fuels.
If you run your engines in a rich 2-cycle, you'll get more engine life and glowplugs will last much longer.
Best Regards
JC

I was under the impression the Mark series engines had a slightly different compression ratio than the original Moki engines, to facilitate running 15% nitro. Can anybody verify this?

The original Moki's were fire-breathing monsters on FAI or 5% fuel, with the 2.10 approaching the same power level as a 40cc - 50cc gasoline engine. They were lighter, too.

I do not have the Nitro...what then do I do? Thanks Capt,n

Quote:

ORIGINAL: BTerry

I was under the impression the Mark series engines had a slightly different compression ratio than the original Moki engines, to facilitate running 15% nitro. Can anybody verify this?

Terry,


There was a Moki production run for Dave Patrick Models.
These engines had a blue cylinder-head, in which the compression ratio was reduced to allow 10-15% nitro.

These Mokis were sold along with the Dave Patrick models they were intended to power, in the North American market.

Therefore the Mark compression is similar to the compression of the original Mokis? I hope it is, as the original Moki 2.10 was a wonderful engine, just perfect for the "in between" size planes that are not quite big enough for a 50cc gasser.

Terry


The 'Mark' badge was/is used to by one US importer or other; probably to allow selling more engines. It will run on 0-5% nitro fuel only.

The Mark is identical to Moki; like the Como is identical to Super Tigre and like Magnum are identical to ASP. The engines are made by the same factory, on the same production line.


The lower compression Dave Patrick engines were badged 'Moki'.

I read here that the US importer had a lock on the moki name and rights in the US, so Moki badged them as Mark to get around the legal system.

Moki service and parts became sporadic at times.

Since Hobby People have taken over the Mark brand, things have been consistent.

I don't know what the problem between the original importer and Moki was. But Horizon did sell them through the original importer and Moki became real popular. Then the trouble started and you couldn't get them and Horizon dropped Moki.

Due to the rocky road of getting a good importer relationship, the Moki company lost a lot of market share.

The introduction of the Chinese gas engines has since cut into the market share. Moki/Mark will never again hold the share it did in the very late 90's

I think Moki/Mark engines could again recapture a lot of the market back...if they get with the program and re-design there engine for gas use by at least adding needle bearings and more cooling fins. Also a RCexcell CD ignition would be good to have included with the engine also. Another thing is if a big company like Tower Hobbies would sell them and have parts on hand that would help bring the Moki/Mark engines back. Just my 2 cents! Capt,n

They already have a gas version and Hobby people carries it. I have one but I have not run it yet.

I thought tere was going to be a gas version sold by??? The thing I would lke to know is, does it have needle bearings on the rod & what other imprvments did they make to assure it will last and not overheat? Gas engines run at higher temps tan glow engines. Thanks Capt,n

I have not had mine opened up to look but you can see some of the changes here
http://www.hobbypeople.net/gallery/214240.asp

Quote:

ORIGINAL: captinjohn

...The thing I would like to know is, does it have needle bearings on the rod & what other improvements did they make, to insure it will last and not overheat?

John,


From the [link=http://www.hobbypeople.net/gallery/214463.asp]Part's description and photo[/link], it seems to be the standard, bronze-bushed item.
This does not wear-out quickly, but requires 5% oil (a needle-bearing rod will do very nicely with 1-2%).

The price, however, suggests it has needle-bearings... The normal, bushed con-rod should cost less than a 1/4, of the $50 they charge for this rod...


The head, however, does seem to have capacity for added cooling; with additional, wide horizontal spans, instead of the short fins.

Yes that rod must be special.....$50. I noticed the rod & related parts was on back order!!! HHHummm. Capt,n

It's the cat's meow.
Picture shows ready for testing with a huge Macs double quiet Pipe.
Mark 2.10 on 5% APC 16x16 yielded 9300rpm.

MR fast....is that right a 16x16 prop??? Wow, I bet the airplane you have that on lands rather fast!!!!!! [X(] Capt,n

The plan was for a giant delta(a scaled up Diamond Dust to 60"), but I cant find the time in this lifetime to get to it, so there it sits. Maybe if I won the lotto and didn't have to work. [sm=teeth_smile.gif]

The engine was in a Sundowner 80" and plane type dedicated (tight fit) Pitts muffler using the same prop. It was turning 7800, new engine + restrictive exhaust. I liked the 17X12 better, don't remember what that turned.

Sold the plane, kept the engine.

Looks like you used 5% nitro in fuel. How much oil per gal and how much castor? Thanks Capt,n

freakingfast,

When I started this thread on the Mark/Moki it was because I have a Sundowner project in mind. Call me weird but I prefer Glow Fuel over Gas. I am more into "speed" planes. I have tried several gas planes (Yaks, 260, 300, 540) and that type of flying is not what I enjoy. I want a little larger plane than I am currently flying and it seems the 80" Sundowner is the best game in town. You have flown the Sundowner with a 2.10 and I was wondering what you thought about this combo?