Zenith Aircraft Builders and Flyers
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FRANKLIN O-200
FRANKLIN 4 Series engine. Rebuilt in excellent condition. 4AC-199-D - 85 hp (63 kW) at 2,500 rpm can be upgraded to 4AC-199-H (O-200-5) - 113 hp (84 kW) at 3,500 rpm. This is excellent power especially for a CH 750 on floats. Complete with all accessories and currently on a piper mount. $3,000 Located South eastern Indiana. Call or text 812-767-3545
Replies to This Discussion
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Permalink Reply by John "Allen" Walker on
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Would like to see some pictures and what's involved in upgrading to a 113 hp?
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Permalink Reply by Dan Pohle on
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You would see very little in a photo. More RPMs is simply more power at the same torque.
Example C-90 vs Cessna O-200 at 100 hp. Simple engine physics,
If you are willing to buy higher octane fuel you can up the compression but it would cost new pistons.
Easiest is a bit more spark advance and a prop that will allow more rpm. Not allowed if certified.
I have the engine repair manuals and it appears that you could pull and regrind the cam shaft with out splitting the cases. More lift and duration= more power.
Wikipedia list the different options that were available new.
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A bit more on engine physics.The link below will take you to Jabiru 3300.
More compression = 100 LL
Less weight.
A single Bing 40mm carb. ( a older 1200 cc BMW motor bike has 2- Bing 40mms.)
Some of the weight is saved in case bolts. 1 in 10 3300s were falling out of the air in Australia from stretching bolts. If you don't fly they tend to hold up well?
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