timing

[Mike Jamison]

Can anyone tell me where the timing mark for TDC would be on a F-14 Wakasaw motor, I assume it is on the flywheel but haven"t been able to locate on this tracotr. Thanks

 

[Tom Fleming]

Mike, I personally don't use timing marks. I like to take the plugs out, and turn an engine over until #1 cylinder is on the compression stroke, and at TDC. Each person has their favorite way, and that is mine. Timing marks can be hard to see, and they get you close, but not always "spot on".

Getting the #1 piston on TDC on the compression stroke is the absolute way to time your engine. IMHO, your mileage may vary.............

 

[Mike Jamison]

Thanks for response Tom. Asked this question for another friend's project, had an F-20 in front of me but not the F-14 to find marks. Yes you are right, everyone has their methods, just prefered a more "spot on" approach than looking thru spark plug hole or using a wire to feel piston motion. Since the engine is coming off an in frame overhaul, may suggest to him using the crankshaft inspection plates to visually make sure rod is at TDC, a 10 degree swing can make the difference in how your wrist feels in the morning.

 

[Earl-IL]

When spark plugs are on a direct angle to the top of the piston, I made a adjustable stop out of a old spark plug. Adjust it to where the piston is about a 1/2 in from TDC Make a permanent timing marker for the front pulley. Then screw your adjustable stop in the plug hole. Then slowly bring your piston up to make contact. Mark your pulley. Then turn the engine backward slowly until you make contact. Mark your pulley. Half way between your marks is the exact TDC. Then adjust your timing marker. This eliminates the piston dwell at TDC. With a modern timing light(with advance knob) you can really tell what is going on with your starting & advanced, running timing. I have found mags. & dist. with 40-50 degree of advance. Have fun & keep them purring.

Earl In Illinois

 

[Tom Fleming]

Mike, understood. I keep a 1/4" wood dowel rod on the bench for determining TDC. it doesn't flex drastically, and by holding it between your thumb and index finger, you can "feel" TDC really well through the plug hole. Since it is wood, it also doesn't mar or damage plug hole threads.