sturdi87
Well-known member
I am about to replace my damaged propeller and have been trying to decide what exactly to buy (and for anyone who saw my thread asking about repairing a cracked prop blade with jb weld I did not do it or even try in case you were wondering).
Here is the setup, it is a 1983 40 hp Mariner 2 stroke on a 14' aluminum. The prop that came with the boat and motor is stamped with the number "48 73136 A40 13P." After a little research I determined that it is a Mercury Black Max propeller 10 3/8" diameter and 13"P.
The first decision is to replace it with a prop of the same specifications or something different? I have been unable to find any information as to what diameter and pitch of prop was original to my particular motor, this prop could have been a replacement for all I know. Before I damaged the prop I gps'd the boat at 29mph in some chop on the ohio river, probably about 3-4". I don't have an RPM guage but here is a video of it running:
[youtube]<object width="480" height="385"><param name="movie" value="https://www.youtube.com/v/JknUrpKJOXQ&hl=en_US&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="https://www.youtube.com/v/JknUrpKJOXQ&hl=en_US&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="480" height="385"></embed></object>[/youtube]
Is there anymore top end to be had? I can open up the throttle a little more from there, when I do the rpm's drop a little, the motor acts like it is choking or something? flooding maybe?
When I actually measured the old prop it was 4 15/16" from the center of the hub to the farthest point on the remaining blades, which comes out to a 9 7/8" diameter. The prop that came on it was already beat up when I bought the package, so I think this explains the missing 1/2" of diameter. The boat seemed like it takes a little long to plane out completely.
I'm in the ohio river, creeks, and backwaters a lot so I am definitely sticking with aluminum. I have been looking at direct replacements (3 blade aluminum 10 3/8" dia 13" pitch); two different props specifically, a Mercury Quicksilver Black Diamond and a Michigan Wheel Vortex XHS. I found some information about the actual features or characteristics of the Vortex XHS (here: https://www.miwheel.com/Propellers/OutboardPropellers/Vortex.aspx) but have not been able to find much information like that for the Black Diamond. How do the features of the black diamond compare? What about michigan wheels exchangeable hub system? pros? cons? vs the standard hub in the black diamond?
Thanks for any input!
Here are links to the props:
https://boatpropellers.iboats.com/M...19217/?session_id=114107940&cart_id=292044272
https://boatpropellers.iboats.com/M...7/624/?session_id=114107940&cart_id=292044272
Here is the setup, it is a 1983 40 hp Mariner 2 stroke on a 14' aluminum. The prop that came with the boat and motor is stamped with the number "48 73136 A40 13P." After a little research I determined that it is a Mercury Black Max propeller 10 3/8" diameter and 13"P.
The first decision is to replace it with a prop of the same specifications or something different? I have been unable to find any information as to what diameter and pitch of prop was original to my particular motor, this prop could have been a replacement for all I know. Before I damaged the prop I gps'd the boat at 29mph in some chop on the ohio river, probably about 3-4". I don't have an RPM guage but here is a video of it running:
[youtube]<object width="480" height="385"><param name="movie" value="https://www.youtube.com/v/JknUrpKJOXQ&hl=en_US&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="https://www.youtube.com/v/JknUrpKJOXQ&hl=en_US&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="480" height="385"></embed></object>[/youtube]
Is there anymore top end to be had? I can open up the throttle a little more from there, when I do the rpm's drop a little, the motor acts like it is choking or something? flooding maybe?
When I actually measured the old prop it was 4 15/16" from the center of the hub to the farthest point on the remaining blades, which comes out to a 9 7/8" diameter. The prop that came on it was already beat up when I bought the package, so I think this explains the missing 1/2" of diameter. The boat seemed like it takes a little long to plane out completely.
I'm in the ohio river, creeks, and backwaters a lot so I am definitely sticking with aluminum. I have been looking at direct replacements (3 blade aluminum 10 3/8" dia 13" pitch); two different props specifically, a Mercury Quicksilver Black Diamond and a Michigan Wheel Vortex XHS. I found some information about the actual features or characteristics of the Vortex XHS (here: https://www.miwheel.com/Propellers/OutboardPropellers/Vortex.aspx) but have not been able to find much information like that for the Black Diamond. How do the features of the black diamond compare? What about michigan wheels exchangeable hub system? pros? cons? vs the standard hub in the black diamond?
Thanks for any input!
Here are links to the props:
https://boatpropellers.iboats.com/M...19217/?session_id=114107940&cart_id=292044272
https://boatpropellers.iboats.com/M...7/624/?session_id=114107940&cart_id=292044272