Forum Home Forum Home > Technical Help > Engine, Gearbox, Stern Gear, etc
  New Posts New Posts RSS Feed: Propellers (Again!)
  FAQ FAQ  Forum Search   Calendar   Register Register  Login Login

Propellers (Again!)

 Post Reply Post Reply
Alastair Pugh View Drop Down
CO32 Members
CO32 Members

Joined: 12 Dec 2010
Location: Scotland
Online Status: Offline
Posts: 35
Post Options Post Options   Quote Alastair Pugh Quote  Post ReplyReply Direct Link To This Post Topic: Propellers (Again!)
    Posted: 30 Dec 2018 at 9:59am
Marisca has a 2-blade 14x8 prop with mottled pink, slightly nibbled blades and interesting cracks emanating from the blade roots.
The swept back angle of the blades is also noticeably eccentric.  Despite this I used to get ~5kts at 2000rpm and ~6.5kts at piston-popping teeth-rattling 3300rpm on my Yanmar 2GMF in flat water but a hobby-horsing 3kts or less in head seas.  "Used to" 'cos I  re-engined in March with an instant starting 3YM20.
The re-engining was a bit rushed as an unused, still in its packing case but 7-year old donk fell into my hands and has been an almost unalloyed joy all year. (Did I mention instant starting?)  The rush meant I kept my original prop and the performance remains the same except it revs to 3600 and gets a stern-squatting ~7kts.  What hasn't changed is the ability to punch into short steep seas or the vibration from the prop.
I am contemplating a Darglow 3-bladed Featherstream - a reforming/weld of my original 2-blade is the alternative - and seek the forum's wisdom.  Will it give more bite into head seas and be a bit smoother?  The forum has tales of woe from earlier Darglow adopters of low speeds and worn stops - are these problems all in the past?

Edited by Alastair Pugh - 30 Dec 2018 at 10:00am
Back to Top
 Post Reply Post Reply

Forum Jump Forum Permissions View Drop Down