Rebuilt motor Too Tight?

[getitrunning]

I had a seemingly too tight problem with a ford 8n I rebuilt. I double checked everything, from ring gap to crank end play to rod and main bearings. it was tight. but when I put it all together and put power to the starter it spun it fast enough to start and ran great. I had rebuilt a whole bunch of engines before doing that one and never had one that was as tight. I guess Im just saying if you know all your parts are correct and you reassembled it correctly if the flywheel will turn and the starter will turn it over you should be good to go.

[Larry in WNY]

Download and read the Blue Ribbon manual. It has everything you need to know in there. Great learning resource.

Larry

[outdoors4evr]

If it really is just too tight for the starter but within spec, then just tow it around like you are pull-starting it for a mile or two behind a truck. Use third gear and be sure to attach the tow rope to the tow bar (at the rear of the tractor). Don't have the vehicle driver go very fast, the tractor only does something like 8mph wide open so keep it slow. The tractor should turn over just fine while being towed as you let out the clutch. After a mile or two, it should start to clean off the cross hatching and warm up those cylinders. It may even try to start if you turn on the ignition and open the fuel petcock. If it does start, then great! Let it do the break-in.

[Clemsonfor]

If it really is just too tight for the starter but within spec, then just tow it around like you are pull-starting it for a mile or two behind a truck. Use third gear and be sure to attach the tow rope to the tow bar (at the rear of the tractor). Don't have the vehicle driver go very fast, the tractor only does something like 8mph wide open so keep it slow. The tractor should turn over just fine while being towed as you let out the clutch. After a mile or two, it should start to clean off the cross hatching and warm up those cylinders. It may even try to start if you turn on the ignition and open the fuel petcock. If it does start, then great! Let it do the break-in.

With the clutch in your not moving the cylinders. And if you "wear off your cross hatching" in the cylinders in a mile or two you have some major problems! You don't want to wear off your cross hatching at that point your probably more likely to score and wear out the rings as there will be no where for the oil to hide and cling to in the cylinder walls.

[outdoors4evr]

If it really is just too tight for the starter but within spec, then just tow it around like you are pull-starting it for a mile or two behind a truck. Use third gear and be sure to attach the tow rope to the tow bar (at the rear of the tractor). Don't have the vehicle driver go very fast, the tractor only does something like 8mph wide open so keep it slow. The tractor should turn over just fine while being towed as you let out the clutch. After a mile or two, it should start to clean off the cross hatching and warm up those cylinders. It may even try to start if you turn on the ignition and open the fuel petcock. If it does start, then great! Let it do the break-in.

With the clutch in your not moving the cylinders. And if you "wear off your cross hatching" in the cylinders in a mile or two you have some major problems! You don't want to wear off your cross hatching at that point your probably more likely to score and wear out the rings as there will be no where for the oil to hide and cling to in the cylinder walls.

Might want to re-read.
"The tractor should turn over just fine while being towed as you let out the clutch."
** It is very well understood that towing around a cub with the clutch in isn't going to turn over the engine.

"After a mile or two, it should start to clean off the cross hatching and warm up those cylinders."
**The cross hatch pattern will remain for a couple hundred hours of runtime, but the very rough edges of the cross hatch do get cleaned off very quickly. This ridge material of the cross hatch does make an initial startup difficult with high friction. Pull starting is just a way to turn over an engine with more torque available than a starter can provide.

[SamsFarm]

Did you start your Cub up yet?

[Cubfriend]

Blue Ribbon Service Manual GSS-1411 should also be a good source for information. Also GSS-1008 specification manual.