Hot Rods gm inline 6 250 inline question

just bought a buick apollo 1973 has a inline 250 the guy i bought it from took the whole car apart for paint didnt bag or tag anything, im a v8 man myself never would have considered a 6 cyl but THE QUESTION is I have the motor back together new starter and it turns really slow like a old tractor is this normal? does this motor have such high compression it doesnt need to spin fast like a chevy v8 ?

 

No. It should spin just the same.

 

Check all of your cables. Make sure the battery is indeed good, with all cells present and accounted for.

If all checks out, it is probably just a bad starter.

I have several present and former customers running the 250. They make good, useful torque, and work just fine for a street cruiser. A few bolt on's-in's can boost the performance to a nice level.

 

Check your ground body to motor but most of all battery ground to motor

 

Make sure your engine/tranny has a good ground

 

did you put the motor back together? If so, are the main and rod caps where they belong? did you check bearing clearances? how hard was it to turn as you assembled it?