If you’re looking to own a largely forgotten piece of Porsche history, take a look at this 1988 Mooney M20L PFM aircraft that contains a 3.2-liter flat-six engine that is linked to the mill of the 911 at the time. The seller on Facebook Marketplace is asking for $ 140,000 CAD ($ 103,039), which is about what you would pay for a new, slightly optional 911.
PFM stands for Porsche-Flugmotoren, or Porsche aircraft engines in English. In the early 1980s, the company saw space in the aviation market for its air-cooled six-cylinder flat engine. Mooney, an aircraft manufacturer focused on high performance models, expressed interest and installed the powertrain in a variant of its M20 model. With 217 horsepower (162 kilowatts) to operate, this was a slight upgrade from the 210hp (157 kW) Continental engine from the previous M20K aircraft.
Typically, propeller planes have separate controls for adjusting the throttle, engine fuel mix, and propeller pitch. One of the interesting aspects of the Porsche powertrain in the M20L is that there is only one lever that handles it all. This means there is less to think about for the pilot in the air.
This one is personalized with what appears to be Porsche seats. They have a white leather covering and the brand badge on the headrests.
Mooney only made 41 copies of the M20L. The company produced 40 in 1988 and only one in 1989. The M20M replaced it in 1989 with a Lycoming turbocharged developing 270 hp (201 kW).
The PFM project was short-lived and Porsche stopped it in 1991. This caused problems for the owners of M20L because the company also stopped producing spare parts for the engine. The FAA has very specific requirements for keeping an airplane airworthy, and the people with that airplane were unable to keep them. There has even been a trial on the matter.
The owner of this M20L indicates that he still has the Porsche engine and that there have been 400 hours since a major overhaul. Typically, a powered aircraft needs to be serviced approximately every 2,000 hours, so the buyer can spend some time in the air before tackling the problem of how to maintain it.