Spun hub?

[tipitina]

Fixing to pull my prop off, is there a way to tell if the hub is "spun"? I think this may be my problem, just trying to determine how to tell once it its off..

 

[achris]

Re: Spun hub?

Once it's off, best way is to take it to a prop shop.<br /><br />Chris.........

 

[Silvertip]

Re: Spun hub?

What's the symptom? Leave it on the motor. Place a mark on the outer portion of the prop. Then place another mark on the hub in line with the other mark. Run the engine (in the water) at full throttle to recreate the problem. Check the prop. If the two marks are still in line with each other the hub is not spun. If they aren't, it is spun.

 

[tipitina]

Re: Spun hub?

Turns out it probably isnt the prop. Dropped the lower unit tonight, and got just under the water pump, and just inside the prop, and still the same thing. When on the water, it idles fine, and then when put in gear, it just pops hard like popping a clutch, and the motor dies. While on land, I put it in forward, and turned the prop, it shouldnt turn, and should pretty much be locked. Well it will turn with very little force, and make a clicking sound from the gear area. Unfortunately, I don't have the tools to get to the gears. Any ideas on what the problem maybe, or if I should just finc another LU?

 

[Motor Boater Bill]

Re: Spun hub?

I'd say don't spend much money on the prop until you find out what's up with the rest of the motor--you may have bigger fish to fry based on your earlier posts! Even if it is spun, it will probably suffice for testing your motor in a tank.

 

[Motor Boater Bill]

Re: Spun hub?

Take off the LU, turn the drive shaft by hand and see what the prop shaft does. Shift by turning the shift shaft, may need vise grips to do this. The turning and clicking, if I understand what you are saying, is normal, it is just the clutch dog doing what it does. Only turns one way, right?

 

[Silvertip]

Re: Spun hub?

Are you sure the shift linkage is properly adjusted. Don't dig into the lower unit until you have verified that. Disconnect the shift cable at the engine and manually place the shift lever in forward. Now try to turn the prop. If it still jumps, there is likely a lower unit problem. If it doesn't jump with the cable disconnect, place the shift linkage on the engine in neutral and adjust the cable until the end is perfectly aligned with the shifter on the engine.

 

[tipitina]

Re: Spun hub?

Bill, it does only turn one way, but no other motor I have ever seen has done this. It will usually have very limited play when in gear. In reverse, it has little play, but in forward, you can turn it but hear the clicking, and yes it only turns the one way. With the lower unit down, I removed the water pump, and there is no longer pressure on the drive shaft, so it turns both ways again, as if in neutral. I have no idea what to do next, as I don't want to invest in the "special" tools, and the mechanic isn't open again until Monday. Ideas?

 

[Motor Boater Bill]

Re: Spun hub?

"it does only turn one way, but no other motor I have ever seen has done this. It will usually have very limited play when in gear. In reverse, it has little play, but in forward, you can turn it but hear the clicking, and yes it only turns the one way."<br /><br />This is normal--look at the LU diagram in your manual, you will see that the teeth on the clutch dog are beveled, and it is spring-loaded, that lets it turn and is the cllicking you hear.<br /><br /><br />"With the lower unit down, I removed the water pump, and there is no longer pressure on the drive shaft, so it turns both ways again, as if in neutral."<br /><br />With it in gear, does the drive shaft turn when you turn the prop shaft, and vice versa? Check this in fwd and reverse, see it if grinds,, check for side play and end play, all can be done without tearing down the LU. You can shift by turning the shift shaft with pliers, don't bugger the splines though.

 

[tipitina]

Re: Spun hub?

I shifted with the pliers, and it does all the same things. Why will it spin and click in forward, but not reverse? I thought for sure this was my problem. If it isn't then I definitely don't want to pull the whole thing apart, I'm guessing it would be something in the powerhead, maybe spark plugs or compression? I have no idea at this point, and am afraid at how much the mechanic will charge/laugh at me........ Please, everyone help!!

 

[tipitina]

Re: Spun hub?

Also, the shafts seem to turn each other while in their respective gears, of course I still hear the dreaded clicking while turning the prop shaft in forward gear. And by the way, there was a very small amount of metal flakings on the magnetic drain screw, however I was told a small amount is somewhat normal. There were no big chunks, and no water in the oil when I drained it. I just want it to work again!!!!!! (and a new floor and a new transom, oh yeah and some stringers while I am in there)

 

[erniex]

Re: Spun hub?

Hi,<br /><br />The clicking you hear is analagous to a socket and ratchet. With the socket on the ratchet handle, you can hold the handle and turn the socket one way and it clicks, but won't turn the other way. The drive shaft is the handle and the prop is the socket.<br /><br />When looking from the rear -<br /><br />Forward - prop will turn CW and ratchet - will not turn CCW<br />Neutral - freely turns either way with no noise<br />Reverse - will turn about 1/8 -1/4 turn each way and stop

 

[tipitina]

Re: Spun hub?

Okay, so the the prop shaft is very slightly SLIGHTLY bent, and the mechanic tells me my problem may be a broken rod, based on the symptoms I described. Is that true, and how can I check?