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View Full Version : How do you tell a Merc crank??

34Fordtk
11-17-2003, 03:46 PM
How do you tell a Merc crank out of the motor?????? Any easy things to spot???
Thanks
34Fordtk
11-17-2003, 05:30 PM
BTTT Damn bottom of page 2 already
Bigcheese327
11-17-2003, 05:33 PM
5/8" cleanout holes. Ford cranks (and a few Canadian Merc, apparently) have 3/8" cleanouts. If you can fit your finger in, it's probably a 4" stroke.
hatch
11-17-2003, 05:36 PM
IN a very firm voice shout....CRANKSHAFT!!!....OUT OF THE MOTOR!!!!!!!!!!...if that doesn't work, try grounding it for a week.
Smokin Joe
11-17-2003, 05:46 PM
hatch, you may have to shout more than once, it may not hear you well. There's lots of sludge in a flatty bottom...
On second thought, better not go there... http://www.jalopyjournal.com/ubbthreads/images/graemlins/wink.gif

And bigcheese is right, if you can finger it, it's a stroker... http://www.jalopyjournal.com/ubbthreads/images/graemlins/wink.gif
lefturn
11-17-2003, 05:52 PM
the front counter wieght has a dimple in the front of it. this is a merc 4" crank I have seen a web site with a web site showing a picture of the dimple but can't remember where. i'll look again and post a picture -------ray
34Fordtk
11-17-2003, 08:10 PM
Hatch I tried that and that SOB will not come out!! http://www.jalopyjournal.com/ubbthreads/images/graemlins/grin.gif Your killin me http://www.jalopyjournal.com/ubbthreads/images/graemlins/cool.gif Thanks the clean outs and the dimple sound like the easy way. I found an Econoline van with a bunch of Flatty stuff in it I am gonna score some of it tomorrow.
Thanks much guys
fuel pump
11-17-2003, 08:37 PM
You know what they say ..... you can always tell a Merc crank .... but ya can't tell it much http://www.jalopyjournal.com/ubbthreads/images/graemlins/grin.gif http://www.jalopyjournal.com/ubbthreads/images/graemlins/grin.gif
Jim Marlett
11-17-2003, 11:00 PM
The dimple only works for Canadian cranks. If the motor is still together, but the heads off, just measure from the deck to the piston at the bottom of the stroke. It's easy to measure the 1/4" difference. If it is out of the motor, the most reliable way is to measure the straight line length of the front heavy counterweight (second counterweight). If it's longer than 6 inches (like 6 1/8"), it's a Merc. If it's noticeably shorter than 6 inches (like 5 5/8"), its a Ford.