well I used a wooden dowel and rotated the piston to tdc and set my degree wheel to 0 and from what i have read there will be a little play in the crank so i moved the crank untill the piston moved and moved it back to 0 and moved the crank the other way till the piston moved there was about a 2 degree movement in both directions so i devided it by 1 and reset my degree wheel to 0 and went 28 degrees btdc did i do it about right michael