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Made to Order - See Notes Below

 Product Notes

This kit is made to order. Typical assembly time is 1 week if all parts are in stock.

Lycoming O-360 Series - 180hp

Our STC covers the installation of the O-360 series* 180hp Lycoming engine with fixed-pitch Sensenich propeller for the entire 108 Series of Stinsons. The 3/8 inch fuel lines in the 108 and 108-1 will have to be replaced with 1/2 inch fuel lines. This will require a modification of the fittings on the fuel tanks. Univair can supply all the necessary 1/2 inch fuel line components with the exception of the fuel valve. Also, the 108 and 108-1 will require the Rudder Bungee Kit if not already installed. Neither the fuel lines or Rudder Bungee Kit are included in the Detail Kit; they must be purchased separately from Univair. The 108-2 and 108-3 already have 1/2 inch fuel lines. The 108-2 will also have the Rudder Bungee Kit already installed. The 108-3 does not require the Rudder Bungee Kit as it has a rudder with a pilot adjustable trim tab.

This engine conversion will allow the use of the existing cowling requiring some modifications to the nose and lower cowl.

Below are lists of major items that we require as a minimum of purchased parts from Univair. These Minimum Conversion Kits will be sold only as a complete package. Other "detail" items are needed for the installation. However, they may be purchased individually or from other vendors. These include items such as controls, ducting, hoses, etc.

Note: In developing this STC installation, Univair used the narrow (standard) deck engine. Installations using the later wide deck engines may require minor modifications to the baffling.

*O-360 engines approved for this STC are O-360-A1A, -A1D, -A1F, -A1F6, -A1F6D, -A2A, -A2D, -A1AD,-A2E, -A2F, -A3A, -A3AD, -A4AD, -A4M, and -A5AD


This kit includes the following:

Part NumberDescriptionQuantity
108-U9001008-2 Oil pressure line 1
CAT16 Aeroduct 2 ft
20060S Hose clamps 2
TACH-37 Tachometer cable 1
SCAT4 Aeroduct 1 ft
SCEET8 Aeroduct 2 ft
SCAT8 Aeroduct 8 ft
MIL6000-12 3/4 inch hose 3 ft
49X8 Elbow 1
A700-10-0600 Button lock control 1
A750-10-0526 Throttle control 1
A750-20-0480 Mixture control 1
J7402-24 Lord mount 4
U70371-003 Swivel 1
89307-000 Rod end 2
BA-4106 Air filter assembly 1
108-U9001011 Tail pipe 2
108-U-9001055 Baffle air scoop 1
108-U-9001058 Muffler clamp 2
108-U-9001053-00 Hanger 1
108-U-9001053-01 Hanger 1
108-U-9001050 Cowl reinforcement ring 1
108-U-9001065 Bushing 1
CLM-60 Circuit breaker 1
82311 60-0-60 ammeter 1
MS20816-8D Fitting (AN816-8D) 1
MS20822-8D Fitting (AN822-8D) 2
MS20823-8D Fitting (AN823-8D) 3

To the extent that the trademarks or registered trademarks of an original equipment manufacturer other than Univair are mentioned on this website, the name of that manufacturer is only for descriptive use and does not imply any affiliation with, manufacture by or endorsement by the respective owners of such trademark. Many products of Univair are replacement products for products of original equipment manufacturer of the aircraft. Univair to the extent required by Federal law obtains approval from the FAA for the manufacture of replacement parts for aircraft. The reference to the name of the original manufacturer is for identification purposes only and not to represent the original manufacturer is associated in any way with the Univair product.

 Shipping & Returns


Univair charges ACTUAL SHIPPING COSTS on all shipments. The shipping charges calculated during checkout are ESTIMATES only. We will adjust your final invoice depending on the size, weight and number of packages being sent. Full details can be found on our Shipping policy page.

Free Shipping Promotion

Orders over $300.00 may qualify for free ground shipping within the contiguous United States. Orders over $3,000.00 may qualify for free motor freight (truck) shipping within the contiguous United States. Full details can be found on our Free Shipping policy page.

Shipping Hazardous Materials (HAZMAT)

Products classified as Hazardous Materials (HAZMAT) cannot be shipped outside the contiguous United States (lower 48 states). 5 gallon and 55 gallon sizes will only be shipped via Motor Freight; smaller sizes can be shipped via either UPS Ground Hazmat or Motor Freight (shipping method will depend on the size of your order). 55 gallon drums will incur an additional drum charge of $76.09 per drum.


All items returned to Univair for a refund or credit must be authorized in advance. Additional conditions apply. Full details about our return policy can be found on our Returns policy page.

To initiate a return, call Univair at 303-375-8882 to receive a return authorization (RA).

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Univair Aircraft Corporation

2500 Himalaya Road
Aurora, Colorado 80011

Toll Free Sales: 888-433-5433
Phone: 303-375-8882
Fax: 303-375-8888


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