funny acting motors

Bigg J · 01-25-2008, 08:13 PM

Took my boat out the other day to see if my impeller install worked. Ended up taking a good little trip. I noticed something when throttling while coming out of the hole and onto plane.

While the boat is coming up and I'm still throttling, the rpms amp up and it doesn't feel like the props are pushing, and then it kicks in and goes.

Why????????

X-Shark · 01-25-2008, 09:32 PM

Just a guess.

Prop pitch is to high and it's not bitting the water enough.

Bigg J · 01-25-2008, 09:40 PM

Ok got another question.

I've been on boats before and be running on plane and all of a sudden if stops engine revs way up and you can't go anywhere.

I was told that had something to do with the shear pin or the packing in the prop. Could the packing in my props being going bad.

Voodoo Lounge · 01-25-2008, 09:48 PM

Could be spun hub?!?!?

Bigg J · 01-25-2008, 09:50 PM

is that a major problem and what could've caused it

orion · 01-25-2008, 10:17 PM

I spun a hub before.It starts out slipping a little under high power and before long I was lucky to get 5 mph out of it. Eventually all your motor will do is make noise. They can be repaired at one of the local prop shops. I got mine fixed at ACCU prop for I think about 80-90 dollars. They will inspect it first to make sure the old one is bad. There was no doubt on mine, the black rubber was about half gone. Some of the things I'm told that cause it are old age, hit something in the water, and improper propeller pitch. I'm no expert, but that is my experience.

sosmarine · 01-25-2008, 10:27 PM

Could be a hub, but I have never seen a hub slip and then grab. Usually it is like orion said, it goes from bad to worse. Sounds to me like air is getting into the prop causing it to slip and then as the boat starts to level it grabs water again. Has anything else been done to the boat recently?

The Maintenance Shoppe · 01-25-2008, 11:37 PM

What kind of motors? Do the engine rpms increase but the boat just won't go? Or are the engines bogging down and just not making power?

Bigg J · 01-25-2008, 11:38 PM

Nope, just changed a t-stat and took the water pump apart to change the impeller.

The Maintenance Shoppe · 01-25-2008, 11:43 PM

While the boat is coming up and I'm still throttling, the rpms amp up and it doesn't feel like the props are pushing, and then it kicks in and goes.

Why????????

Can you describe in further detail?

Read my questions.

01-25-2008, 08:13 PM	#1
Bigg J Senior Member Grouper Join Date: Nov 2007 Location: Gulf Coast Alabama Posts: 1,072	funny acting motors Took my boat out the other day to see if my impeller install worked. Ended up taking a good little trip. I noticed something when throttling while coming out of the hole and onto plane. While the boat is coming up and I'm still throttling, the rpms amp up and it doesn't feel like the props are pushing, and then it kicks in and goes. Why????????

01-25-2008, 09:32 PM	#2
X-Shark Senior Member White Marlin Join Date: Oct 2007 Location: Pensacola, Fl. Posts: 2,870	RE: funny acting motors Just a guess. Prop pitch is to high and it's not bitting the water enough.

01-25-2008, 09:40 PM	#3
Bigg J Senior Member Grouper Join Date: Nov 2007 Location: Gulf Coast Alabama Posts: 1,072	RE: funny acting motors Ok got another question. I've been on boats before and be running on plane and all of a sudden if stops engine revs way up and you can't go anywhere. I was told that had something to do with the shear pin or the packing in the prop. Could the packing in my props being going bad.

01-25-2008, 09:48 PM	#4
Voodoo Lounge Senior Member Sailfish Join Date: Sep 2007 Posts: 1,210	RE: funny acting motors Could be spun hub?!?!?

01-25-2008, 09:50 PM	#5
Bigg J Senior Member Grouper Join Date: Nov 2007 Location: Gulf Coast Alabama Posts: 1,072	RE: funny acting motors is that a major problem and what could've caused it

01-25-2008, 10:17 PM	#6
orion Senior Member Mingo Join Date: Oct 2007 Posts: 119	RE: funny acting motors I spun a hub before.It starts out slipping a little under high power and before long I was lucky to get 5 mph out of it. Eventually all your motor will do is make noise. They can be repaired at one of the local prop shops. I got mine fixed at ACCU prop for I think about 80-90 dollars. They will inspect it first to make sure the old one is bad. There was no doubt on mine, the black rubber was about half gone. Some of the things I'm told that cause it are old age, hit something in the water, and improper propeller pitch. I'm no expert, but that is my experience.

01-25-2008, 10:27 PM	#7
sosmarine Senior Member Sailfish Join Date: Sep 2007 Location: Navarre/Town Center Posts: 1,826	RE: funny acting motors Could be a hub, but I have never seen a hub slip and then grab. Usually it is like orion said, it goes from bad to worse. Sounds to me like air is getting into the prop causing it to slip and then as the boat starts to level it grabs water again. Has anything else been done to the boat recently?

01-25-2008, 11:37 PM	#8
The Maintenance Shoppe Senior Member Snapper Join Date: Nov 2007 Posts: 532	RE: funny acting motors What kind of motors? Do the engine rpms increase but the boat just won't go? Or are the engines bogging down and just not making power? __________________ *The Maintenance Shoppe* Full service boat, pwc, and trailer repair 4048 Creighton Rd Pensacola, FL. 850-221-6789 www.themaintenanceshoppe.com

01-25-2008, 11:38 PM	#9
Bigg J Senior Member Grouper Join Date: Nov 2007 Location: Gulf Coast Alabama Posts: 1,072	RE: funny acting motors Nope, just changed a t-stat and took the water pump apart to change the impeller.

01-25-2008, 11:43 PM	#10
The Maintenance Shoppe Senior Member Snapper Join Date: Nov 2007 Posts: 532	RE: funny acting motors While the boat is coming up and I'm still throttling, the rpms amp up and it doesn't feel like the props are pushing, and then it kicks in and goes. Why???????? Can you describe in further detail? Read my questions. __________________ *The Maintenance Shoppe* Full service boat, pwc, and trailer repair 4048 Creighton Rd Pensacola, FL. 850-221-6789 www.themaintenanceshoppe.com

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