Motor Size
Lead Driver
Joined: Jun 2005
Posts: 8,463
Likes: 724
From: Calgary Canada
If you post the VIN or info from the Data plate, we can tell you what the motor was when it shipped from the factory. If you want to identify the current motor, you'll need to post some info about it.
I'm not the local expert on the 390's, but I'm sure they are around here somewhere.
I'm not the local expert on the 390's, but I'm sure they are around here somewhere.
New User
Joined: Jan 2008
Posts: 0
Likes: 24
well Lucky You 
You now get to measure the stroke of the piston.
There is NO visible way to differentiate the 2 engines .
Other than tearing it apart and identifying the parts , the only way is to *Measure the stroke*
You can use the dowel method of inserting it in the sparkplug hole and turn in the crak over until it bottoms out > Making a mark >> Turning the crank until it tops out...then making another mark .......then measure the distance .
The guy probably knows this too
You now get to measure the stroke of the piston.There is NO visible way to differentiate the 2 engines .
Other than tearing it apart and identifying the parts , the only way is to *Measure the stroke*
You can use the dowel method of inserting it in the sparkplug hole and turn in the crak over until it bottoms out > Making a mark >> Turning the crank until it tops out...then making another mark .......then measure the distance .
The guy probably knows this too
