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yanmar 3Ym30 engine replacement

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Sea-U View Drop Down
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Joined: 14 September 2012
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Sea-U Quote  Post ReplyReply Direct Link To This Post Posted: 16 November 2020 at 18:12
I have yet to remember to get the size of the propeller when on shore. Cry

It was delivered by Hanse.


Edited by Sea-U - 16 November 2020 at 18:13
Sea-U is a 370e #532 located SW Norway
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Captain Cook View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Captain Cook Quote  Post ReplyReply Direct Link To This Post Posted: 16 November 2020 at 20:33
Search->advanced search->"size flexofold"->all forums->any date->
-> and you will find 6 pages with informations about propellers.
Change the search words, and you may find more.
Freya H400 #27 (2006), 40HP 3JH4E, 2-cabin, 3-blade Flexofold, Aries LiftUp Windvane, Exturn 300, Jefa DD1,Simrad NX40,Icom M603(VHF)+M802(SSB)
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H8jer View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote H8jer Quote  Post ReplyReply Direct Link To This Post Posted: 21 November 2020 at 17:17
I also have the 30hp yanmar sd20. It is not under powered.

Flat out the boat goes 7.3kn with a tiny (too tiny?) Flexofold Racing 16x13 2Blade
SD20 is max 16" in diameter but hear 17" is ok.


Edited by H8jer - 21 November 2020 at 18:02
Hanse 370#487 30HP 3-cabin
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jeb View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jeb Quote  Post ReplyReply Direct Link To This Post Posted: 21 November 2020 at 17:57
I use to have a Hanse 371 with the Yanmar 3ym30 and sd20. It was fitted with a flexOfold 16x10 3L, revved much to much. When order the boat I did som research and got a prop calculation from flexOfold and they suggested 17x12 or 17x13 3L and I also asked Hanse for that. But when taking delivery (back in 2004) the boat was already in the water so I could not check. after first summer I got it replaced with a 17x11 3L. Better but still revving a little bit to much. Before replacing your 30hp, buy a decent prop.

Edited by jeb - 21 November 2020 at 17:59
Jesper
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tango View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tango Quote  Post ReplyReply Direct Link To This Post Posted: 21 November 2020 at 18:02
Thank you for the answer
the 370 is lighter than the 375 (800KG)
can you tell me if you have a 3 or 2 blade propeller and at what rpm do you reach the speed of 7.3
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Post Options Post Options   Thanks (0) Thanks(0)   Quote H8jer Quote  Post ReplyReply Direct Link To This Post Posted: 21 November 2020 at 18:15
Originally posted by tango tango wrote:


can you tell me if you have a 3 or 2 blade propeller and at what rpm do you reach the speed of 7.3

Have not measuered the tachometer but looks like 3600. To blades.
Next season I can try to measure.
Normal crusing is 2100-2450 around 6 kn
Hanse 370#487 30HP 3-cabin
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