MGF is proud to offer this very special gasoline SH Aircraft Engine
SH Engines offer everything you’d expect in a powerful, high quality engine
- -ABC Piston/Sleeve Technology
- -Dual Ball Bearings
- -Dual Needle Precision Carburetor
- -Aluminum Case with Precision CNC Machining
- -Properly Tempered Precision Crankshaft
- -Specialized Turbo-style GR4 Glowplug Included
- -Glow Plug Wrench for Turbo Plug Included
- -Muffler Included
The GF6 is a gasoline engine that requires no on-board ignition. It operates just as a glow engine would, but uses vastly more affordable and commonly available gasoline (High octane please, 91) with an oil mix of 20:1 - We recommend Red Line Two Stroke Oil.
Case size of a .25! It'll drop right in most .25-.36ci size aircraft. You're even going to fly smaller 40 size airplanes with good authority or have superior power in 25-32 size airplanes. At the time of this writing, this engine is the smallest gas engine in regular production today. Tired of swelled batteries? Convert that EP airplane to Affordable gasoline!
Don't forget this is a gasoline engine so you will need a tank and gas lines that are gasoline compatible.
SH Engines has been in business for decades making helicopter engines as well as high performance racing engines and super reliable sport car engines for almost every major car maker around the world. These new aircraft engines are based on these learnings. Precision fit and finish result in easy break-in and superior longevity. You’ll notice they feel smooth brand new out of the box.
And, every SH engine we sell is supported with parts and service. We know engines and know you need support. You can depend on SH and MGF for superior performance, value, and support.
SH Engines are made in Taiwan
SH GF6 6cc .37 Gas Engine
- Bore: 20.4mm
- Stroke: 18.4mm
- Displacement: 6.01cc (.37c.i.)
- Weight w/Muffler: 358g
- Glow Plug: SH GT4 (This is a Turbo Plug, not a standard size airplane plug)
- Fuel: 91 octane/ 20:1 FUEL/OIL MIX (RED LINE TWO STROKE OIL)
- Practical RPM: 2800 to 11000
- Recommended Prop: 10x6
- H.P. w/Rec prop: 1.3HP @ 11000rpm
Compatible Clamp and Clip Glow Plug Ignitor Connectors (McDaniels style 1/4 turn lock will NOT fit):
If you'd like to add the pump system from the GF9 to the GF6, SH has made a kit and it's ready to use. Click Here for the Pump System Retrofit Kit
Garry Kraemer (verified owner) –
This is my first glow ignition gas engine. I installed it in my engine run stand and used Sullivan ProFlex fuel tubing. The tubing is a little bit too small for the connectors on the carb and fuel tank. I gently kept working it until I had the tubing stretched over the fuel fittings. I used 16:1 fuel to oil ratio. Approximately a 50/50 mix of Benol Racing Castor and 2 stroke oil for air cooled engines. I used a Dynamite LiPo powered glow igniter to power the glow plug. The glow plug is too large in circumference to allow the glow igniter to clip the glow plug securely. I had to hold it in place. I tried hand propping the engine to get it started. I couldn't even get it to pop. I grabbed my electric starter and used it to crank the engine. it sprang to life and I made sure it was '4 stroking' due to a rich fuel mixture. The throttle was almost 50% open. I let it run for a period of time. After cooling for an hour, I started it again. Still no luck hand starting it. The second run would not keep running due to the high speed mixture being too rich, so I closed the HS needle a bit. After several runs I opened the throttle wide open and kept the mixture rich. I have not put a tach on it, but it is running good enough to put in an airplane. So far, I've used about 1/2 gallon of fuel.
1. I haven't been able to get it started at a low throttle setting. I have to open the throttle above 50% to get it to start. I'm sure the low speed needle needs adjusting prior to attempting the first flight.
2. Be extremely careful when tightening the glow plug. I believe the aluminum head is pretty soft. I'd like to see a brass insert for the plug to be inserted in. I also noticed bubbles leaking from the threads around the glow plug. With the tapered plug, I didn't expect to see any leakage.
3. The prop must be drilled in the front to allow the nut to center the washer. I do not like this design!
4. I could see visible smoke during the first run; temp at the glow plug showed 70C. Subsequent runs have not displayed signs of blue smoke (oil) in the exhaust.
I hope to get several years use out of this engine.
SH engines needs to produce a .61 (10cc) gas engine!
Robert Cummings (verified owner) –
I received the engine and it looks great, the only problem I have is that a normal glow plug ignitor doesn't fit the plug. This problem would have been nice if noted on Mikes webpage, now I have to order a special ignitor for this engine be advised!
Mike Greenshields –
The glowplug is compatible with all of the clamp or clip style connectors such as this one
https://www.mikegoesflying.com/shop/engine-accessories/long-glow-plug-connector/ for us
Or Dubro, Hangar 9, and Rage.
Also, this type from Sullivan will work although this is from a different website https://sullivanproducts.com/product/glow-plug-klipall-gc40/
This information was listed on the website but it wasn't very clear. I've updated the webpage to make sure it is not easily missed. Thank you for pointing it out.
Thank you and Happy Landings!
Kenneth Gerlits (verified owner) –
I purchased the little gasser and I was totally pleased how easy it was to start and break in. I ran 30 oz. of 91 octane thru the engine at 20 to 1 oil mix. What I would like to see is a 90 cc gasser for my Bud Nosen Cessna 310. That would really make it a fantastic flyer. Keep me informed on your future engines I am now getting my Four Star 40 ready. Thank you, Ken
Mike Greenshields –
Thank you for the kind words. The SH Factory Owner has been informed of requests. We'd like some bigger engines too.
Robert Cummings (verified owner) –
got the ignitor working, was my fault. Engine started up first time and ran great very happy with the engine. Would love to see bigger engines now.
GENELANGLEY (verified owner) –
I HAVE HAD MY SH GF6 FOR 3 MONTHS NOW AND RAN TWO GALLONS OF FUEL THRU IT WHICH IS A LOT OF FLYING. NOT SURE WHAT MY AIR MILES PER GALLON ARE BUT IT IS A PRETTY HIGH NUMBER. I MIX CHEVRON 91 20:1 WITH REDLINE OIL. IT TOOK A LONG TIME BUT I FINALLY GOT THE SETTINGS SO I COULD GET THRU A COMPLETE TANK WITH SMOOTH RUNNING END TO END. LIKE OTHERS SAID I HAVE TO START WITH THE THROTTLE OPEN ABOUT 1/3 OPEN TO GET A START WITH ELECTRIC STARTER. THE IDLE IS VERY GOOD AND TRANSITION IS ALSO GOOD. THE MOST AMAZING THING IS THIS ENGINE HAS THE POWER OF A .45. PS SLOT THE NEEDLE AND USE A LONG TOOL TO ADJUST. BE SAFE.
Bill Sidney (verified owner) –
Picked up this engine as an experiment to replace a OS .25FX 25 engine. It is 2 oz heavier, has the same engine mount spacing and the muffler is interchangeable too.
Put it on Limited B combat ship and it pulls the 50 Oz plane with authority! Flew combat against a 25, speeds were very close, felt like 25 was faster on downward lines but the GF6 carried speed better through the corners. Not contest legal but we had a BLAST.
I'm using 93 Octane with Redline oil at 20:1. So far I've run 32 oz of fuel through it, still using the same glow plug.
Thank You Mike! You have been extremely helpful with my first gasoline engine.
David Hoffmann (verified owner) –
I started using this engine in May in a Balsa USA Eindecker 40. I have been using 93 octane and 24:1 Redline oil mix. I have almost a gallon through the engine. Here in the northeast the weather changes often. I found that I have to adjust the low end needle and the high end needle every tine I fly when the weather changes. It could be hot and dry, hot and muggy now in the it's fall cold, 45 65 degrees. I always have to let the engine warm up for 2 minutes before it will transition smoothly. Once adjusted for the day the engines runs just fine. Today I had a situation where I could do a loop but the engine would quit when I did a roll. I could do a half loop to inverted flight and the engine continued run. Once I got the needles adjusted the engines ran fine the rest of the day.
Stan Rhein (verified owner) –
Purchased this engine about 3 months ago (8/29), and only until recently, have been able to fly the plane. Initially, the engine ran fine on a test stand, but once put on my plane with the engine head sticking out of the right side, I couldn't get it to run in any position but level. When pointed up, the engine would lean out and die, no matter how rich the needles were. When pointing the plane down, it would richen up a die. Mark was very helpful in working with me to resolve the issue as he sent me a new engine, in addition to a new carb. The new engine was a .37 Nitro, of which, I removed its carb and installed on my gas engine. With some tuning to the needles, I was able to move the plane on different axis without the engine stalling. Then made my first flight with no other issues. I have noticed the engine needs quite a bit of break-in time as this engine now has roughly 3/4 gallon of gas through it and is still gaining on performance. Am hopeful it'll become stronger as the flights get logged. I Thank Mark again for all his support with this.
GENELANGLEY (verified owner) –
MY GF 6 IS STILL RUNNING STRONG I JUST ORDERED A SECOND ONE SO I CAN BUILD A TWIN JUST TO LET PEOPLE KNOW MY SOLUTION TO MY GLOW STARTER NOT FITTING WAS TO CUT A CLIP LEAD IN HALF AND SOLDER TO A BATTERY . WHAT I AM MOST HAPPY ABOUT IS THE GLOW PLUG IS STILL WORKING WITH THIS MUCH TIME ON A GLOW ENGINE I WOULD HAVE REPLACED IT BY NOW PROBABLY MORE THAN ONCE
NO SIGN OF BEARING WEAR SO VERY HAPPY WITH THIS LITTLE GUY.