[Sentoa] 26' Repower

[Pete Bradshaw]

Mike--Suprised by only 5000 hrs. on a BMW. We had three times that on
a 50hp BMW in a Swan when we sold it.The owner says it still works
well. Our 26 has the 100hp Yanmar-which has been entirely
satisfactory. We usually run about 8 mph @ 2400 rpm which takes
roughly 1.3 gph.WOT is 3600 rpm and 11.5 mph which is sometimes very
nice to have available. My only beef with the engine is that its
cooling system is just barely adequate at top rpms. Someone had way
over-proped ours. When we installed a less aggressive prop, the
problem was solved. I have seen Yanmars with truly impressive hours
that performed well. Pete Bradshaw,26141, Retta J, Lake Norman, NC
On Tue, Apr 15, 2008 at 2:41 AM, Mike Pedersen <mikeped at gmail.com> wrote:
> Hello all,
>
> I know there is a lot of info in the archives, of which I am digging
> through, but I thought I'd ask a few questions anyhow.  I am in the process
> of narrowing down options for repowering a NT26.  I am interested in 50 to
> 75 hp.  100hp may be nice, but I can't imagine using it, even in the
> treacherous passes here in BC.  I imagine it would throw a heck of a wake.
> I am used to cruising at 5.5 - 6.5 knots, but it might be nice to be able to
> do 8-9 knots if needed on occasion.
>
> I currently have a 45hp BMW 3 cylinder diesel with ~5,000 hrs on it.  Let's
> just say it's near death and leave out the grim details.  It powers through
> a 1.25" SS shaft and a 18RH11 prop with a Hurth 1.88:1 transmission.  The
> boat also has Morse cables connected to a brass Kobelt head which I would
> like to keep (it goes so well with the brass Brown Bros & Co ships wheel).
> I have a semi custom interior as it is an owner finished boat, so your boat
> details (on engine hatches, pilothouse doors and cabinetry, engine mounts)
> may or may not apply.  I am interested in seat of the pants or empirical
> data.
>
> I know many of you have Yanmars.  What are the pros and cons?  They seem
> like a high rpm engine to me.
> Anyone out there have a Beta or a Sole?
> Does anyone have a trolling valve on the transmission?  I think many hours
> of low rpm (low temp) trolling for salmon may have been the demise of this
> engine.
> What kind of boat speed does 75hp get?
> Kind Regards
> Mike Pedersen
> Northern Spy NT26-028
> Powell River, BC
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