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 Catalina/Capri 25/250 Sailor's Forums
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 message to online re. 4blade prop		  New Topic  Topic Locked
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tinob
Master Marine Consultant

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USA
1883 Posts
Initially Posted - 05/11/2006 :  11:27:57  Show Profile
I sent a message to Chris Collins @ Online Outboards stating that we/I were wondering if he would consider providing the group of Nissan/Tohatsu users on this forum with a loaner four blade prop for testing. Tom ,Atgep, volunteered to do the testing should Online accept the idea. I await his reply.

Val on Calista # 3936 Patchogue, N>Y>
Val Bisagni]
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tinob
Master Marine Consultant

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USA
1883 Posts
Response Posted - 05/12/2006 :  07:55:10  Show Profile
Folks, Chris Collins of Online Outboards response was a rejection of my suggestion stating that several members already have the props on backorder and will be reporting on the props when they get a chance to use them. Oh well I'll stay with mu ywo props until then.

Val on Calista # 23936 Patchogue, N.Y.
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atgep
Master Marine Consultant

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1009 Posts
Response Posted - 05/12/2006 :  12:10:40  Show Profile
I guess there is no need for them to offer real world data. I was prepared to do a pretty scientific comparison including pulling power and fuel economy.

Too bad. I guess the association does not give them enough business....

Tom.
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dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts
Response Posted - 05/12/2006 :  13:29:57  Show Profile
Maybe they don't want to roll the dice on a possible unfavorable review.
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tinob
Master Marine Consultant

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USA
1883 Posts
Response Posted - 05/12/2006 :  13:44:57  Show Profile
One way or the other a poorly performing prop is going to be made known on the forum. I think he had a better deal lending us a prop. Should the prop get rave reviews here I'll not buy it from Online. There is a dealer eight miles from me who could use the business. He'll get mine.

Val on Calista # 3936 Patchogue,N.Y.
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atgep
Master Marine Consultant

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1009 Posts
Response Posted - 05/12/2006 :  16:45:48  Show Profile
I will contact Nissan and see if they can provide a few samples for testing.

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Keith D.
Navigator

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USA
233 Posts
Response Posted - 05/12/2006 :  19:14:51  Show Profile
Here is an idea for testing props. I went to a local prop repair shop in Newport Beach and asked if I could test several props. With a suitable deposit I walked out of the shop with 4 props which would fit my outdrive. I took the props and my boat to a local lake and started doing some testing. 5 runs of 0-40mph and top speed on each prop. If one of the runs was way out of the rest it was thrown out, the rest were averaged. What I found out was the composite props have too much flex and there for no performance. The stainless steel props had a better top speed but were slower on the 0-40. The boat needed the flex of the aluminum to reduce the pitch under power. There was only one prop, which gave me 12 seconds better in the 0-40, and a better top speed from 48 mph to 55 mph was a five-blade stainless steel prop with small blades (the high 5 by Mercruiser). With this prop I was able to up the pitch from 21 to 23 which gave me the better top end and still get a better low end (0-40) because the small blades slipped more when under power. When I took the props back to the shop you know which one I bought. So if you are looking at a 4 blade you will need more motor unless the blades are smaller. If they are sufficiently smaller you may be able to pitch up by one pitch and get the same result I got with the 5 blade.
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.