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Part# 12-04969


The propeller blade mounted timing device is a self-contained unit that incorporates the blade mount, digital inclinometer, and adjustable cinch strap. More accurate, quicker, and easier to use than competitive products. The blade slots are graduated and spaced so as to allow installation on many different blade model designs.



nice simple and accurate tool!

Ken K
August 27, 2020

It works great. Very accurate. Improved my speed and quality. It fits every airplane Ive put it on so far. Done a 1947 aeronca scout and a 180 hp 172 1974. So far. Just in the first week. Its paid for its self.

Mike S
August 5, 2019

I bought this unit to double check a problem I was having with my Lycoming. Im very meticulous with mag timing. Anyway, the unit worked very well. Yes, I have heard of people saying they can use their smart phones to do the same thing. But you still need a solid plug for your spark plug hole. The prop mount fit my sensenich prop very well. THeres no doubt there is considerable profit margin on this set up, but I gave it 5 stars because it is something I probably couldnt make (I dont have a machine shop that nice nor a 3-d printer). I like it far more than the flower pot we use for continentals. For Lycomings....if You can see your starter index, you can still do a great job timing that way. With this unit, you dont have to remove the front cowl though. Trying to time using the top case half just isnt all that accurate in my opinion (from the back side). This unit takes all the guess work / slop out.

June 10, 2019

Ive timed engines using the taped on digital protractor. If your time is worth anything to you and if you actually work on doing this often, you will appreciate the difference and time saved.

Richard B
November 5, 2017

One guy said you can hold a timing device on with rubber bands or tape. You can, but this works so much better. Ive timed engines using a taped on digital protractor. If your time is worth anything to you and if you actually work in a shop doing this all day, you will appreciate the difference.

October 31, 2017

The digital device is $45. Tape or rubber bands will hold it on. You still need a top dead center device.

August 27, 2017


Q: Does the Propeller Blade Mounted Magneto timing device register a full 180 or 360 degrees or does it reset at 90?

Per Vendor: The device follows a 90 degree rotation. So as you turn and reach 90 degrees if you were to continue it would count from 90 back down to 0. That is why I provide a special length timing stop pin with the kit that will keep everything in a 90 degree fan.

Q: Does the Propeller blade mounted timing device work with 3 bladed props?

Yes this will work with a 3 bladed prop.

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