whats the heaviest motor ever put on a Kitfox

[Alex 13]

Hi, interesting to read the weights and distribution of the center of gravity of each one.
Captainden, in Argentina, aeronautized car engines are widely used. The cost of a Rotax is equivalent to 4 or 5 car engines, when the budget is small there is no other option. They work well, there are planes flying more than 10 years ago. They've even used an Audi 2.0 diesel without problems. The most sought after are the Japanese, Suzuki M10 and Honda L15, they have an aluminum block that gives them a gross weight close to 200 pounds.
I think Rotax's performance is hard to beat, but in some countries cost is a big factor when it comes to choosing, it's not just about benefits.
Look for Aeromomentum, they have good engines at a good price

[efwd]

Precisely the realization I experienced as well. I can probably state that the Rotec engine install that the factory had on their plane, sold me on the KF. Then reality struck. That is how I came to the 912iS. Not regretting it though. The operation of the 912iS is simple and all the data right on the screen.

[PapuaPilot]

I upgraded to the larger (current design) elevator at John McBean's suggestion. I do not have the trim assist kit, but have seriously thought about installing it. With full flaps I do have a fairly high stick force. There is enough nose up trim with half flaps. I installed a gap seal on my elevator last year using Gorilla heavy duty tape and it seems to help a little.

[David47]

Not sure if it’s the heaviest but I’m putting in a Lyc 0-233 which weighs 210lb dry together with a Airmaster CSP which weighs 24lb. I can still take 2 people and full fuel but have to reduce baggage which is no big deal.

[airlina]

While I would hate to be the winner in this fat engine contest, my Continental IO-240(125HP) weighs in at a portly 250ish lbs with accessories. At least this is what I thought when I installed it years ago. At OSH this year while wandering around I saw specs for the IO-240 that had it weighing 277 lbs, yikes!. Having said that , I have to say my Series 5 performs great and here in the east haven't found any airstrips I can't get in and out of. Prop is a 11 lb wood sensenich. We cruise at 120 mph true , takeoff dist -350' solo, and land 350' if i try hard. Bruce N199CL

[PapuaPilot]

I was holding back too. I believe the dry weight of the IO-240 is listed at 246#. Just like Bruce I am very happy with the performance of the aircraft with the IO-240 on my model 5 Kitfox. I think I ended up with one of the lightest planes with the IO-240. I have a useful load around 660# and over 500# with full fuel. My normal flying CG is always near the front limit (me and fuel), but I can almost put the full 150# of cargo in the back and not be out the aft CG limit.

[jmodguy]

My IO-340 with accessories and harness etc weighed in at 279.5.

[alexM]

Blowing the dust off this thread. New guy question: Do all of you folks with the heavier engines have the 1 degree forward sweep as well?

[ken nougaret]

Mine does not have forward sweep with O-200A. The manual said to do it but John Mcbean said not to. He was correct and balance is perfect.

[ridgerunner]

My 7 has 1 degree as well