[C320-list] Repowering update and anti-siphon height?

[Scott Thompson]

Most boats I've looked at (including my 1999 boat) have the engine raw 
water anti-siphon loop in the port side cockpit locker, up high, right 
below the deck.  I forget the exact routing of the hoses, but they do 
not go through exposed areas of the aft cabin, and certainly no holes in 
the rear engine cover are required.

Bernie Garrett wrote:
> Hi folks,
> 
> Re-powering is almost complete and as soon as we¹re done I¹ll post info and
> pictures on the Website, and see if Mainsheet are interested in a write up.
> 
> The Volvo D1-30 is in place and looks great, it is a bit smaller than the
> old Perkins, and access is superb, but there have been a few additional
> unanticipated issues along the way:
> 
> 1. I needed to get the engine mounts cut down and re-glassed a couple of
> inches lower as the Volvo sat too high on the existing bed rails. An extra
> $600 I wasn¹t expecting, but they have done an excellent job.
> 2. The prop shaft needs cutting down a bit as I am installing a drive saver
> coupling, and the flex of fold prop couldn¹t be re-pitched so I needed to
> buy new blades for it ($950)!
> 3. The exhaust hose needed replacing to a wider bore and the Water muffler
> box needed adaptors for the inlet and outlet  glassing in to fit the Volvo
> exhaust outlet and new diameter water hose. At the same time I have had new
> hoses and a larger raw water filter installed to improve the flow into the
> engine.
> 
> One thing my mechanic has suggested is raising the anti-siphon loop higher
> in the boat as where it is it is only about 4 1/2² above the actual exhaust
> outlet. This would involve cutting  holes in the rear engine cover, for the
> pipes and mounting it in the rear cabin, and then manufacturing a cosmetic
> cover-up for it. I can see the rationale but wonder if it is really
> necessary as it is a lot of extra work, and the exhaust outlet is above the
> water line. I would value other owners thoughts, and also to know if anyone
> else has made this mod?
> 
> More news soon on the first fire up and sea trials!
> 
> Cheers
> Bernie Garrett
> Antares, Hull #88
> Point Roberts, WA

-- 
Scott Thompson
Surprise, #653