grumpy_o_g
Well-known member
Try ringing the British Kiel Yacht Club for advice. They should know the good guys and bad guys in that area.
I have just had the quote for fitting a new Beta 20HP into my Rival 32 by a German yard in Kiel. The quote was fairly eye-watering (€8500) but when I read it in detail seemed to be very comprehensive, including changing skin fittings for the water inlet, replacing just about everything which could be replaced, including in particular; fabricating new engine mountings from S/S. The replacement of all hoses, and associated skin fittings, makes sense, particularly as they are the age of the boat (25 years) with the exception of part of the exhaust which i replaced in 2007. The pipes are all of different sizes, too.
My concern is that replacing the engine mountings may be gilding the lily somewhat - but I don't know enough to say definitively. The old engine was an MD11c - which I believe was a fairly standard fit for this type of boat. Does anybody else have any experience of this sort of upgrade, and if so, can you answer the headline question?
On a separate but related issue, if I am going to replace the prop, is it worth bothering with a folding versus a fixed? The current one is fixed about 14 inches (I think).
I do not know, I have never changed an engine before and am merely quoting the mechanic's verbal approximation - his formal offer shows €2'500 for labour. Yes, a bit of a round number but I can accept something of a guesstimate for such work.How on earth can anyone need 20 days? I changed our engine,gearbox,shaft & prop + new instrument panel and loom and it took me a total of 4 days, including having to remove and refit the cockpit floor, steering pedestal etc. Most manufacturers will supply engines with mounts to fit existing holes. These prices are typical "marine" rip-off.
It would be a bit like fitting a 6 inch exhaust to a Clio. Yes it will improve sailing performance by maybe half a knot, but you are clearly not so interested in speed or you would not have bought the boat you have. So why bother?
MrJemm. Thanks for the reassurance that I (probably) haven't bought an engine that is too small!
And when I had a steel 35 footer, 21hp was plenty (for me), so 20 not being enough in a GRP 32 footer is surprising.
You are right - but I have 50% more hp than with the proposed engine in the Rival - put another way he will be pushing 90% of the weight with only 67% of the power. Waterline length is less so max speed will inevitably be a bit less and 20hp will achieve that in flat water. The loss will be in motoring in adverse conditions.Mine was a Nanni. But although I cannot remember her displacement, I rather doubt she was lighter than the OP's. As for your 37' Bav against his 32' Rival, surely your's will face more resistance into heavy weather, with 1) being heavier, 2) Being beamier and realted to that, 3) possibly more "blunt".
But, my lessons in small craft design and such were several years ago now, and only rely on my limited experience to discuss this, so will bow to other before I drop myself in it!
Replaced a md11c with a beta 28 and didn't bother with the modified mountings.The distance between the feet across the engine were the same.I had to raise new engine by 12mm did this with 2x10mm flat bar and 2mm shims.The flat bar ran full length along top of each engine bearer and attached using the original holes for the md11c feet.This allowed me to drill and tap the bar for the beta mountings.That was almost 4 yrs ago no problems since (except for seawater pump).