6 hp outboard problem

L

lauriee15

Member
Joined
Aug 28, 2002
RO Number
9947
Messages
25
Hi, so I have a 6 hp or outboard motor when I put it at half throttle it runs fine.. when I put it at full throttle it feels like it has spun the hub... I stop the motor ..restart it and it runs fine at half throttle .... then when I turn it to full throttle again it feels like the hubs spun again ..?!? does anyone have any suggestions on what it could be ?!?
thank you so much
Laurie
 
Ok, so have you actually checked to see if the hub is spun?
 
Looks like you ID d the problem. Change the prop. They re cheap on a motor that size
 
I don't think the prop is spun because when I am going 2-3 knots it's feels find but when I go full throttle it feels like it's spun or maybe out of gear ... it revs up but does not go forward ...( Will the boat go 2-3 knots if the prop is spun?)... I have to turn off the motor restart it and then I can move forward again but only 2 to 3 knots...
 
That is exactly what happens when a prop hub is spun. It will move ok at slow speeds but slips when any real power is applied. Cheap fix.
 
That's exactly what happens. Fine with little power then spins out. And the more it spins the worst it get to the pint where it will spin even at low rom
 
I agree it does sound like a prop problem
 
Awesome .. thank you guys sounds like an easy fix I can do myself !!!
 
Does your 6 hp actually have a replaceable (spinnable) hub , or perhaps just an inexpensive shear pin (very easy if you have spare pins)?

Just to clarify, you do mean above a certain throttle setting , revs go up while thrust goes down, right?
 
Sounds like a spun hub, shear pin would have very little thrust!
 
Would a prop with a sheared pin even spin? I have a 3.5 HP and the prop spins(you can see it turn when you go from neutral to forward) but will not move the boat, but when I turn it off and put it in forward I can spin the prop and feel the piston is moving. Would a sheared pin hold enough to do all of this?
 
"Would a sheared pin hold enough to do all of this?"

With a sheared pin? No.

With a "spun hub"? Yes.
 
Turned out to be the shear pin, was fine when I layed it up last fall, how it broke is a mystery to me, but thank goodness, a cheap shear pin!
 
I used to have a 1988 WetJet that used plastic shear pins. Every time I'd come up out of the water a little bit (where the intake was out of the water) and then hit back down, the plastic shear pin would, well, shear. I finally replaced it with a finishing nail and never had a problem after that.
 
George, never owned an outboard but I'm thinking that finishing nail would defeat the purpose of a shear pin; no ? Isn't a shear pin supposed to shear when required do do so ?

BOB J
 
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