RE: Saito FG-20 or 21
If you ask me to justify the purchase of this engine,I seriously can't.After having used and operated it, I find that it is a zero sum game.The cost of the engine is rather high, coupled with the higher maintenance required i.e adequate lubrication and heat issues ,additional weight and extra wiring vs the fuel savings , it just doesn't add up.The fg36 for that capacity is fine but i think anything lower becomes a novelty.
You just can't afford to fling the plane about with nary a care as the cost of damage repair is rather high.The pump assembly alone will set you back more than 100 bucks and I seriously don't know how long the pump will last and it is not serviceable.A cheap chinese two stroke at a fraction of the cost would give you more courage! just my 2 cents.