Cone on the front of the prop?

[deejaycee_2000]

I'm not too clued up on Chrysler outboards, but this past weekend I saw a 140hp Chrysler that had this plasic dark grey cone thing on the front of the prop, it didn't look like it had any purpose ..... what the hell is it?

 

[tashasdaddy]

Re: Cone on the front of the prop?

some of the older engine had the prop cones, before thru prop exhaust, it was just a plastic cone that covered the prop nut, held by a cotter pin. probably just to look cool, also seems like some of the held the cotter pin in place, it must have been an oldie you saw.

 

[Texasmark]

Re: Cone on the front of the prop?

Hey Dee,

If you are talking about a conically shaped prop nut hootus, the '71 85 I used to own had one. It also had a real hot dog shaped alum prop. But that was a mistake as the hot dog shape caused real cavitation, not ventilation, on the forward area of the blade, rear side, and it wore holes in the alum.

The intent of the cone was aerodymanics, er ah aquadynamics.......reduction of the vacuum and resultant drag at the rear of lower unit as it went thru the water. That same effect is one of the reasons for thru prop exhausts....fill the vacuum with exhaust gasses.

Mark

Mark

 

[JC1933]

Re: Cone on the front of the prop?

Hi guys,

I have a 1993 8 hp Johnson that has this nose cone makes it look streamlined. d

 

[deejaycee_2000]

Re: Cone on the front of the prop?

mmmm, yeah now that I am thinking about it it makes sense ..... this 140hp just had a normal prop ..... thanx for the info guys ........