All Small Six 170 issues

[Rodders]

Have been having ongoing issues that I just can't seem to resolve.
I rebuilt my 170, first time ever done an engine. Replaced pistons, rings all the gaskets and bearings etc. I got it running finally after a lot of tinkering. It has compression readings of 100psi on each cylinder. I have put some oil in each cylinder and the checked and stays about the same, so pretty sure rings are sealing ok.
Is the head leaking? Somewhere?
I have checked and re checked the rocker spacing, timed the engine, checked points, replaced the advance valve thing on the distributor.

When try to drive it, it has no power and will stall under virtually any load.

I am really struggling to work out what's going on and honestly at point of giving up.... Not one to be beat but it's been 6 months of trying and trying again. Appreciate any help!!!!

 

[rickwrench]

That seems on the very low side for compression psi. Did you check it with all plugs out, carb wide open? Fresh/fully charged battery, good starter, etc. How did you break in the engine?
Also, was the block at least honed?
Check/set initial timing with the vacuum dashpot disconnected and hose plugged.
Accelerator pump working?

Run through each possibility, completely, before moving on to the next. Very hard to solve anything shotgunning every problem at once.

 

[Frank]

Have been having ongoing issues that I just can't seem to resolve.
I rebuilt my 170, first time ever done an engine. Replaced pistons, rings all the gaskets and bearings etc. I got it running finally after a lot of tinkering. It has compression readings of 100psi on each cylinder. I have put some oil in each cylinder and the checked and stays about the same, so pretty sure rings are sealing ok.
Is the head leaking? Somewhere?
I have checked and re checked the rocker spacing, timed the engine, checked points, replaced the advance valve thing on the distributor.

When try to drive it, it has no power and will stall under virtually any load.

I am really struggling to work out what's going on and honestly at point of giving up.... Not one to be beat but it's been 6 months of trying and trying again. Appreciate any help!!!!

All symptoms point toward late camshaft timing. Did you degree the camshaft when installing it?