furledd Posted June 16, 2015 Report Posted June 16, 2015 I am selling a Powerflow exhaust system, removed from a M20J model Mooney. It has approximately 300 hours on it and is in excellent condition. This is a "Generation 1" design, with original muffler, with ceramic coating, and is still in production at Powerflow. The Gen1 version fits I am told the majority of the M20E and F models with IO-360, as well as the later J models. It is the only choice if your aircraft is equipped with either the LoPresti cowling or (on the J Model) electric cowl flaps. Note: on approx.30% of the E, F (1964-1968) the Gen2 version may be a better fit and has to do with clearance of the alternate air door configuration in some cowlings. This exhaust mod will give significant performance gains , according to the manufacturer, including: Top speed capability improved by as much as 6.5 knots at 11,500 feet Improved rate of climb - up to 15% improvement Fuel savings at the same speeds - up to 1.3 GPH less This also includes a drip pan to be installed on the engine (J Models) as part of a service bulletin in 2007. A slightly different shield is available for the E and F models from Powerflow for $75. The reason I am selling is has mainly to do with the timing of an annual and an unexpected tax bill from the wifes business plus I was unsure if it would fit a Southwest Texas Cowl and did not want to take the additional time and money to trial fit it. All the original paperwork comes with the exhaust system. I checked with Powerflow and the STC is transferrable for $300 to your Mooney of choice. Equivalent hardware can be used according to the install manuals, but you can also buy from Powerflow the following items to aid in installation: P/N Description 10310 – New exhaust gaskets, nuts, lock washers, washers. $42.00 10362 – Hardware pack for clamps for muffler: $5.50 210 – Neoprene straps (used ones are included but you may want new ones) – $10.00 each A new system runs about $4,600 retail ($3,800 including shipping with the discount for long lead time orders plus if you order from a Powerflow dealer). Asking $1,800 Shipped. Any questions, please ask.
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