TRACTOR AND GAS ENGINE REVIEW

A Home-Made Mixing Valve


| September/October 1966


This is a 1929 Oliver Hart Parr owned by Eppinga Oliver Dealer, Rock Valley, Iowa. Benjamin Henry Gesink is on the tractor.

On page 23 of the May-June issue, Mr. Krueger states that Avery on Page 22 of the January-February issue is a 20-35. I am almost sure it is a 12-25 H.P. which was built from about 1912-1922. It had a 19?x 7' pulley while the 20-35 had a 16 x 7?' pulley and had fenders covering the front half of rear wheels. The Twin City looks like a 12-20 or 17-28 H.P. I am checking with Mr. Blomgren to find out about pulley size.

Recently the mixing valve on a stationary engine was put hopelessly out of commission, and a very simple but effective one was constructed in the following manner.

A piece of one-eighth inch copper tubing was connected to the gasoline pipe above the check valve. The free end of the pipe was flattened nearly flat, leaving a hole about the size of a large sewing needle for the gasoline to flow through, and then was inserted through a one-fourth inch hole in the intake pipe above the regular mixer connection. Then, in place of the old mixing valve, a discarded motorcycle throttle valve was screwed on. When this valve is closed the suction on the spray nozzle is heavy, permitting easy cranking. Then the valve is opened some, until enough air passes to make a good mixture. Of course any form of adjustable air intake would do. But this device was made of old material.



Here is a picture of two little gas engines that I made of pieces of steel. They don't run but look rather nice on a corner shelf.

This is the 1947 Model B. K. John Deere gas tractor I am working on at present.














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