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Monday 9am - 5pm Tuesday 9am - 5pm Wednesday 9am - 5pm Thursday 9am - 5pm Friday 9am - 5pm

Yesteryear Aviation

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Mason, MI
Yesteryear Aviation

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Owner: Dave Groh Yesteryear Aviation Inc. is located in Mason, Michigan, fifteen miles south of the state capital, Lansing, Michigan.

Our inventory started with three hundred and fifty drums of surplus aircraft hardware from WWII and the Korean War. We have grown and now produce a smoke system, PMA gaskets for the Continental W670 & Lycoming R680, and PMA T-6 parts. In addition, we build Stearman Model 75 series wood wings, wing kits, and overhaul W-670 engines. Our hardware inventory includes a wide variety of bolts, clamps, Dzus fasteners, nut plates, plumbing fittings, bearings, primer fittings, and prop bolts, plus many “out of production” items. We are not able to include the entire inventory on our website. If you are in need of a specific part that is not listed, please call!

11/10/2026

More progress on the Snj center section rebuild, painted the top side today. Next painting the bottom light grey and all the stencils.

10/27/2026

Valve lash tool now available for the Kinner Radial engines. Clearance is set using a dial indicator instead of feeler gauges. Much more accurate and easier to use. It sets up the same as the tool for the continental as shown in previous photos.
Includes tool assembly two thumb screw nuts and storage block. $395.00 plus shipping. Yesteryear Aviation 517-676-4416

10/27/2026

Valve lash tool now available for the Lycoming R-680 engines. Clearance is set using a dial indicator instead of feeler gauges. Much more accurate and easier to use. It sets up the same as the tool for the continental as shown in previous photos.
Includes tool assembly two thumb screw nuts and storage block. $350.00 plus shipping. Yesteryear Aviation 517-676-4416

09/27/2026

Fuel lines installed, new cables made and installed. About time to put the rear bottom skin on for good. SNJ-5 center section rebuild.

09/15/2026

New valve adjusting tool for continental W-670 engine now available. This tool uses a dial indicator to set the rocker arm instead of a feller gauge. This is much more accurate and easier. The tool mounts to the top of the head as shown using two thumb nuts. The inidicator is setting on the rocker arm roller. Set roller against the valve stem set indicator to 0 and adjust the rocker arm until you have .010 clearance indicated on the dial. Lock down the rocker arm and double check.
Each set includes indicator head, two thumb nuts and storage stand. 517-676-4416
$350.00 per set.

09/11/2026

We are at the national stearman fly in this week. About 80 stearmans have arrived.

08/19/2026

Upper skin has all the stringers riveted in place on the SNJ center section skin. The skin has been put on the center section for good. Now working at getting the tabs on the ribs riveted to the stringers.

08/13/2026

Started squeezing the stringers on the top main skin of our snj center section. Will squeeze all the stringers then reinstall on center section. Ribs and spars will be shot with rivet gun.

07/28/2026

SNJ-5.

07/23/2026

Lots Clecos needed drilling rivet holes in to Snj-5 center section top main skin.

Address

4322 Curtice Road
Mason, MI
48854

Opening Hours

Monday	9am - 5pm
Tuesday	9am - 5pm
Wednesday	9am - 5pm
Thursday	9am - 5pm
Friday	9am - 5pm

Website

http://www.yesteryearaviation.com/index.htm

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