I am freshening up a SBC 400 for my fishing boat and have to replace the crankshaft due to rusty coupler splines from the out drive that used to live behind it. I recently replaced the starter with a top mount on my three point mount/bell housing. Since I have to have the crankshaft balanced I thought a change from a flywheel to a lighter flexplate would be in order. I don't intend to pull the engine until winter sets in. Does anyone know how many teeth are on the flexplate used with the top mount starter?
No but on an outdrive it causes the input shaft to push on the crankshaft when trimming and that will take out the thrust surface. I have determined that indmar used a 168 tooth 14" flexplate with the three point mount bellhousing.
I retained the right to borrow it back if I need it. What is the program on using it. Do you temporarily mount the suction housing without the impellor shaft and adjust mounts till the tool rotates smoothly like a mercruiser out drive?
Didnt realize you were putting the mercruiser motor in a jet. Pretty hard to align with 3 point mount. Up and down with an inclinometer. Side to side looking at 3 point flange alignment to jet housing or measureing off bellhousing bolts to sometbing on jet. Originally there was a tool that slid over the jet shaft and then it had a drill jig made into it to set tha front mounts. Havent seen one in over 40 years. Using that 3 point mount. Better make sure you have the right driveline length. Too short. You will bend the pump shaft. Too long. So long thrust bearing
I should mention it has a 350sbc in her now but one of the vortex heads is cracked. I can't see throwing money at it when I have this 400 built by a NASCAR engine building buddy. We used the 153 tooth flywheel with the alpha out drive but it had a bottom starter. This engine pushed my heavy welcraft 60mph. Should push my new boat even faster since it weighs a ton less.