I am not sure about that, in my experience Subaru ECO 35 is the way to fly, I own one.
Subaru ECO 35 still made in Japan, reported 30000 miles runs with no problems.
You can get it for around $150 (limited time and quantities)
Honda GX outsourced to Taiwan, price $200 + without clutch.
Some people on this board report dissatisfaction with Honda 35GX power.
That,s the bottom line.
The Honda plant producing the M4 engine series is a world class state of the art facility, Honda is justifibly proud of it. 5000 associates producing 2.1 million power products and 1.5 million motorcyles annualy.
I wasn't going to say anything negative about the Robin, but you forced me to present the facts.
The Honda has ample power and a superior oil system to any of the other mini four strokes.None of the other engines have an oil system that centrifugaly filters the oil to keep metal particles and heavy solids from entering crankcase.Thats the bottom line.
The Honda doesn't have the inherent weaknesses that the Robin EHO series have, namely a flywheel that is hung off the crank well away from the engine subjecting the crankshaft to unecessary loads and crankshaft whip.
A check ball valve system in the oil metering circuit that can be tempermental (a ball wedged open renders oil system inoperative)
The worst part is the rubber hose oil pickup that breaks off at the fitting or looses the weight to keep the end in the oil and no longer picks up oil.
You can keep a Robin full of oil and still lose the crankshaft assembly or score cylinder due to these problems, I've seen more than one of each on high mileage trimmers. You basicly end up throwing the engine away and replacing it.
As long as there is oil in the Honda it gets oil. Thats the bottom line.
Don't get me wrong I'm not bashing Robin, just stating the facts.
I've owned at least one each of the RedMax, Ryobi mini four strokes on the market, at least 2 EHO35 engines and probably a dozen Hondas.Worked on over 2 dozen Honda M4 engines ranging fron GX22 to GX35 and many EHO25 and 35 engines.
Working on these engines for 10 years in various real world applications and dyno testing, hands down the Honda GX35 is the best performing four stroke under 36cc.
Guess I'm a noob that doesn't know anything...