do you know the crank part number?The R4 block was only sold as a bare block, just like all blockzillas.
555204 is the single bearing crank is there a number for the dual? i hear a single would work if it's turned down555204 which is also 495645. Flathead 5hp cranks have been out of production for years now.
The bushing block crank can be turned down in a lathe to slip fit a bearing...the single bearing cranks will accept a ball bearing just fine.555204 is the single bearing crank is there a number for the dual? i hear a single would work if it's turned down
You don't want a bushing under the bearing - that was the factory's doing. Yes, it was placed between the crank and bearing. It was a way to limit the number of cranks and part numbers necessary to fit in several different style engines. They already had a larger ID bearing in stock for another purpose. Instead of inventorying a bearing similar to the 9 ball replacement bearing shown above, they used what they already had in stock. There are several crank part numbers that will work, some take more effort than others. The single bearing crank will fit as long as you use the aftermarket 9 ball bearing. If the bearing does not come with a chamfer machine on the inner race, you will need to do that to match the radius cut in the crank so that the face of the bearing meets the face of the machined flat surface on the crank. This is also important to center the crank in the bore. Then adjust your endplay.thanks for everyone's help so far. however, 555204 is the crank listed in the Raptor II parts diagram. I'm not interested in a different part number for the same crank shaft. did briggs not make a dual bearing crankshaft? is there I/C flathead motor with dual bearings that fit the raptor 4 block? anyone have that part number?
how do you put a bushing under a bearing? i only know of a busing on the inside of the inner race vs around the outside race.