Nissan 1986 5hp NS5B Propeller Size

[StarGazerI]

I would like to change my prop size. :facepalm: Has anyone done this? Whats are the pros and cons.
Regards, StarGazerI

PS I gess now I have the basic MFG on now.

 

[pvanv]

Re: Nissan 1986 5hp NS5B Propeller Size

Robin,

There is a whole range of props for that motor. There is also a "mouse ear" high-thrust sailboat prop available, which may work on the Stargazer...

See the prop chart at http://www.tohatsu.com/accessories/prop.html

Any dealer (including myself) can supply a prop. But, knowing the correct prop for your setup is only speculation. You must do a little trial and error. You want to get as close as possible to the factory WOT RPM, without exceeding it. For a heavy dinghy, such as the Stargazer, the EE prop is a good choice. Good low-speed torque, but limited top end.

 

[StarGazerI]

Re: Nissan 1986 5hp NS5B Propeller Size

Robin,

There is a whole range of props for that motor. There is also a "mouse ear" high-thrust sailboat prop available, which may work on the Stargazer...

See the prop chart at http://www.tohatsu.com/accessories/prop.html

Any dealer (including myself) can supply a prop. But, knowing the correct prop for your setup is only speculation. You must do a little trial and error. You want to get as close as possible to the factory WOT RPM, without exceeding it. For a heavy dinghy, such as the Stargazer, the EE prop is a good choice. Good low-speed torque, but limited top end.

Sounds good to me Commander! So let me give you some background on my "heavy dinghy" and also a picture too. I had a special mast install that moves up and down to go under bridges and tight area's as seen in the photo's... Also the dinghy specs.

This is StarGazer I:
LOA --18'
LWL -- 15' 5"
BEAM -- 7' 5"
DRAFT, Board up -- 1' 6"
DRAFT, Board down -- 4' 3"
Displacement -- 1700 lbs. fully loaded including the wife's Cosmetics.. LOL
Ballast -- 400 lbs
Sail area -- 165 sq. ft.
Mast height above DWL -- 30'

Pictures: Mast up and down




Nissan 5hp on back bracket that goes up and down




Picture of me and Dinner at a lighthouse with wife....LOL



How do I tell what I have right now? Is there a marking somewhere? Is the EE the same as the "mouse ear" ? where do I see them or can you send me a link. Thanks again Capt. Rob of StarGazer I

 

[pvanv]

Re: Nissan 1986 5hp NS5B Propeller Size

Rob,

Anything over 1500 pounds is considered "heavy". Your best prop will be the 3-blade high thrust ("mouse ear" or "elephant ear") prop. There should be cast-in markings on the current prop, either on the back of a blade, or on the hub between blades. Regardless, there is no other prop that comes close for sailboats. It's stock on the 6 hp sailpro model for just that reason. The last page (p4) of the 2-6 hp brochure http://www.tohatsu.com/tech_info/brochure_pdfs/2012_brochure/Toh2012_2-6.pdf has a small picture of that prop. If you'd like one, they are available from any dealer (including me). You would order 399B645121 PROP 4/5/6HP, 8.375" DIA X 6" PITCH (ELEPHANT EAR) $145.83. We sell a lot of them. In fact, should you one day want to retire the old M5B 2-smoke motor, the ultra-long (25") sailpro would be a great choice, as it comes stock with that prop, and also has charging capability.