154 won't fire

i followed the instructions i got and the 154 is firing but it is not turning over fast enough to start it is very slow, the battery is new with 630 amps, can i jump it also will tht make it crank fster or how do you connect batteries to get 24volt it has not run in a long time if you remove th belt the startr spins at full speed

The starter is also the generator,not sure how it would handle 24 volts. Sounds like it may be time for a rebuild on the starter.

I agree with billde. To show you how little of a battery you need to turn a Cub engine over, I just use a small 12v battery like you would find in a typical lawn mower. Works good and much cheaper.

DO NOT try 24 Volts! You will ruin the starter/generator and regulator.

Just because a battery is new doesn't mean it's fully charged. Put it on a battery charger overnight and try again.

Taking the belt off and running the starter tells you nothing. Even a bad starter will run full speed without a load on it.

If your battery is fully charged, AND the cables are good/clean/tight, AND the switch isn't burned, AND it still doesn't turn over very fast, you have a bad starter motor.

i was thinking that but wasn't sure, i know a cub turns counter clockwise and a cadet goes clockwise is it possible to alter the cadet starter

You need to make sure your points are clean and in good shape without any pitting. Clean them with some 320 wet or dry until shiny. Then see if the engine will start. You don't get the mechanical advantage with a starter/generator as you do with a 12 volt starter that engages the ring gear on the flywheel. If your battery cables are old and cracked replace them.

I have that S/G on a Wards garden tractor and I've had it 40 years. I do have a car battery in there with the terminals on the side. The battery is from Walmart and is nine years old. It has a 14hp B&S engine. Hal

By meaning it won"t fire, do you mean it will not start or it has no fire? They are two totally differant things.
You do need a 22nf battery to turn it over, do you do have the correct amperage battery. If the engine is just turning slow, I would check the brushes on the str/gen, they can be worn, springs weak, or the commutator is dirty, unless you have some experience in that field, take it to a shop that does that.
If it has no fire, then you need to to check for voltage to the coil, check your points for fire would be the first two things to look for.
If you will post what your exact problem is, maybe someone can help you a little better
Jim

DOUBLE check the timing!!! Jump pos to pos and neg to neg. but I dont think thats your problem. I think your problem is the the starter/genny, and Im also pretty sure one from a Cadet wont spin it over, even if you can reverse the rotation. Its not near as big. (BTW, I have a lawn mower battery in mine, and it turns it over just fine!) You could try and pull start it.

Hard to say how slow is too slow.

Definitely don't get into 24volts, you're wasting your time.

GENERALLY speaking, you don't need to turn the engine over very quickly at all to get it to start.

If you do have to, there are other problems. Turning it over faster is only hiding the problem.

If it's TRULY going way too slow - that means you don't have the CURRENT to turn the starter - either weak battery/corroded connections/bad starter.

I'd undo and sand/file all connections from the battery to the starter - INCLUDING the one everyone forgets - the ground connection on the chassis side of the battery ground cable.

I think you'll find that at least speeds the starter up a little, if not solve your problem.

After that, go back to basics on your engine - it SHOULD start even with a slow starter.

Make sure your using fresh gas, and your carb is clean (see if a little starter fluid will get it to start - if it does, you probably have blockage in your carb)

Check your plugs, make sure they're all firing, with a strong spark, and firing at the right time (timing).

Clean your points.

Check your compression to be sure you don't have deeper problems.

I'm not familiar with the 154 and valves, but if they're adjustable, adjust them.

If all that does nothing for you and you feel it's really turning too slowly, I'd pull the starter and bring it somewhere for testing/rebuild.

Everyone has pretty much covered this, but I'll summarize:

1.) Full charge on battery
2.) Clean, solid connections on all wires
3.) Correctly tuned ignition
4.) Correctly working starter
5.) Carb and fuel delivery correct

If all of these are in order, you don't have to spin an engine fast to start it. I have been starting F series tractors for years, with only a hand crank. When the fuel and ignition are right, they start within 1/4 turn on the crank, and I ain't superman, so the RPM's are SLOOOOOOOOOOOOOW when I am cranking. Never had a problem starting them.