Engine Envy
A couple of months ago
Clive Cameron mentioned he was
considering getting a bigger engine for
his H28 Rondo. I though it
sounded like a good idea. When the wind
is blowing from the southwest and the
tide is running out it can take what
seems for ever to get back up the Tamaki
Estuary. In ideal conditions my own H28 Achernaries
can get over five knots but when the
wind is on the nose and it’s choppy we
fall back to four knots. Not bad going
though for an ancient Yanmar YSM12 but
we struggle to keep up with H28 Monty
Python! Anyway we are a
sailboat.
Dale Felmingham (our
Nelson coordinator) tells me that in
Nelson most H28s have 20 to 30hp
engines. The big engines go really well
in an H28 - about 25hp is the max for
one - anything over you don’t get the
benefit from it as you are breaking hull
speed and just dig a big hole as you go
along. One can comfortable cruise at
6-6.5 knots and have plenty of extra
power to use when necessary - strong
winds, currents, getting out of trouble
etc. In Nelson there are 4 H28's with
Yanmar 3Gm - 27 hp engines in them, one
with a 25hp Daihatsu; 1 with a 21
Kubota, 1 with 20hp QM Yanmar.
Well it turns out that
Clive has done more than consider
installing a new diesel – he’s done
it! And he’s not alone as Nigel
Trickett has decided to replace his
Yanmar YSE 12 on Vanadas
with a bigger engine. I had to have a
look! It turns out that the new engines
are smaller, quieter, more powerful and
lighter than the original 10 / 12 hp
motors they replaced. I can't get over
how much spare room there is.
A Nanni 3 cylinder 21
hp (a marinised Kubota) is installed in Rondo.
The fridge compressor is mounted in
front. The Nanni comes with a sump pump
which you can see on the left of the
picture and all the parts you need to
get access to service are mounted on the
front of the engine.
http://www.nannidiesel.com
A Yanmar 2 cylinder
18hp is installed in Vanadas
http://www.yanmar.com/marine/products.html
I was also intrigued
by a new Bluewater "drip less"
stern gland installed on Vanadas.
Notice the water hose which goes to the
stern gland from a tap on the raw water
feed to the engine. This keeps the
ceramic seal lubricated with water.
The engine in Achernaries
was fully reconditioned 4 years ago, is
running well and should have a few more
years life yet. I guess it’ll be a
while before I get my new engine. In the
meant time we’ll get there in the end
– keep a place near the BBQ for me.
Richard Legge - Achernaries
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