looking for somewhere to start ???

[brnschoneck]

hi yall im just looking for some suggestions not perfection here .. i have a 1978 14ft bumble bee with a 1965 merc 650 outboard on it the prop is old n damaged i cant pull any numbers off it ..I basically cruise n fish does anyone have a similiar setup i am looking to replace the prop not sure what to try as far as pitch goes,i dnt wanna spend a lotta money on one,maybe 150.00 it is 15 tooth reversed i know, since its old motor id like to keep rpms down of course what is a decent prop to start with ??ok I found numbers in hub thy are 46-77342 a4 ol 15 thanksvguys u been a great help

 

[RogersJetboat454]

Re: looking for somewhere to start ???

Welcome to Iboats.

How damaged is your old prop? You may be able to get it rebuilt for less than the cost of new. Even if you still want to get a new one, it's not a bad idea to have the old one rebuilt to keep as an emergency spare. The prop shop would also be able to tell you the pitch of it so you would have a good starting point on wisely selecting a new prop.

BTW have you tried looking in both the exhaust portion, and on the barrel of the prop between the blades for the diameter and pitch numbers?

As far as keeping motor RPM's down, you don't want to over prop the motor. It can, and will do worse things to the engine (think melted pistons from detonation), than selecting a prop that sets the engine in the correct RPM ranges for WOT. If you want to take it easy on her, back off the throttle a bit....

 

[jestor68]

Re: looking for somewhere to start ???

You want to prop the motor so that it runs in the full throttle rpm range of 4500-5500 rpm.

The Soloas Amita(aluminum) 13.5 X 15 pitch should be a place to start. The number is 1411-135-15. $94.45 here.

The 4 blade version(13 X 15) is number 1413-130-15. That one would work better for what you seem to want; better hole shot and cruising performance since you don't want to run wide open all the time. And it's only like $10 more.

 

[brnschoneck]

Re: looking for somewhere to start ???

thanks y'all I id find numbers they are 48-77342 a4 ol 15 I will get this one fixed chewes up a bit n buy this soias one looks good to me y'all been a great help thanks sooo much! !

 

[brnschoneck]

Re: looking for somewhere to start ???

thanks y'all I id find numbers they are 48-77342 a4 ol 15 I will get this one fixed chewes up a bit n buy this soias one looks good to me y'all been a great help thanks sooo much! ! I do not have rpm gauge? wats a good easy way to make sure wot is good with this motor??? n prop is right seems like it is assuming this is rght prop for motor that's on here? ?

 

[RogersJetboat454]

Re: looking for somewhere to start ???

thanks y'all I id find numbers they are 48-77342 a4 ol 15 I will get this one fixed chewes up a bit n buy this soias one looks good to me y'all been a great help thanks sooo much! !

By that part number, I'm coming up with right hand 15 pitch.

 

[jestor68]

Re: looking for somewhere to start ???

thanks y'all I id find numbers they are 48-77342 a4 ol 15 I will get this one fixed chewes up a bit n buy this soias one looks good to me y'all been a great help thanks sooo much! ! I do not have rpm gauge? wats a good easy way to make sure wot is good with this motor??? n prop is right seems like it is assuming this is rght prop for motor that's on here? ?

The Mercury prop selector indicates that your motor should turn 5200- 5300 rpm with a 15 pitch prop.

 

[brnschoneck]

Re: looking for somewhere to start ???

The Mercury prop selector indicates that your motor should turn 5200- 5300 rpm with a 15 pitch prop.

sweet I'm rght there then awesome n ima go with the 4 blade def...ill let y'all know how it goes in a few weeks as soon as I get it n get out wheather should break here in nc soon! !! thanks again y'all !!!

 

[brnschoneck]

Re: looking for somewhere to start ???

i was thinking that ill def.. go with the 4 blade thanks ....