New Prop - 1/8 inch clearance?

[logart00]

I just got a new prop for my 1971 50hp Evinrude (50173S). The old prop was 13-3/4X15, the new prop is 14X13.

When I put the new prop on, I noticed there is barely 1/8" clearance between the tip of the prop and the trim tab anode??

I am afraid to spin the prop! Is that enough clearance? The prop selector shows that prop as an option for my motor.

 

[Crownie2]

Re: New Prop - 1/8 inch clearance?

Sounds too close to me. I'd remove it and try it. Perhaps you could cut it down if you feel you need it on there.

Bob

 

[Texasmark]

Re: New Prop - 1/8 inch clearance?

The prop will move forward slightly (clutch dog slack), but not backwards. Both the prop and tab are fixed entities. Personally I run about 1/4" clearance on my 24P Ballistic. Would not have a problem if I only had 1/8". Now, if it were something else, that could wobble, then you might be concerned about it.

Mark

 

[logart00]

Re: New Prop - 1/8 inch clearance?

It is actually the clearance between the tip of the blade and the bottom of the anti-cavitation plate. I called the prop shop and they said the prop make only sells props that fit perfectly and that 1/8" is not a problem. Scary though to see that small of a gap and thinking about that prop spinning 5500rpm!