Glen-L Hot Rod

1. The sensors are only installed when we wish to check the carburetor's calibration after we've made jetting changes. A stainless steel oil pan drain plug is installed when the sensors are not needed.

2. Sensor fitted to the first cylinder bank...

3. ... and the second cylinder bank.

To help tune our carbureted engine, we fabricated aluminum spacer blocks to mount a wideband oxygen sensor in each cylinder bank as close to the exhaust ports as possible. The sensors will feed an air-fuel meter which will indicate if the air-fuel mixture is rich or lean. The spacer blocks are prototypes for an automotive TBI to marine conversion kit that we've been working on. We'll have more on that project as soon as its up and running !

1. We fabricated a set of exhaust manifold spacers from 1-1/2" thick aluminum stock.

2. The original allen head cap bolts were replaced with studs.

3. The spacers will be drilled and tapped to accept a wideband oxygen sensor.

1. The prop on the left is our old OJ 12x16p LH 3 blade Nibral propeller. It has performed flawlessly, but we wanted to increase our cruise RPM by several hundred RPM, so we had a new OJ propeller reworked to an 11x14p.

2. (Index)

The propeller shaft was shortened by 5/8" to reduce the distance between the aft end of the strut and front face of propeller hub.

Diameter was reduced from 12" to 11" which yields 1/2" more blade tip clearance.

1. The rubber webbing we originally used for the seat base and back was too soft, so we replaced it with seat belt webbing. Here are a few photos of the final installation.

2. Custom fabricated steel brackets mount the adjustable driver's seat base to the engine stringer.

3. Here's a close-up shot of one of the brackets.