If this is just a raw water pump
, why not get one that is driven by an accessory belt and use that? If the pump etc is impossible to find, I'd personally eliminate the possibility of having one break in the first place. I'm sure you could use a cog belt like a timing belt and run a water pump designed for racing
use. Since it looks like it either uses cast iron or some other metal for connectors, it should be simple to seal off that housing after removing the gear
. I've used JB Weld to good effect on cracked parts, as long as their isn't any weight on them anyway.
But a belt driven, or even an electric raw water
pump might be worth the investment if this one is so hard to find that you'd be stranded for weeks waiting for a part like that. I had a ford Vee Four forklift motor in my Saab Sonnet that was a ford forklift/industrial motor (Gas though). Tiny little thing, but it put out 50hp with a one barrel carburator. A friend took one of those motors and installed in HIS sailboat to good effect, and if you have a gas motor in a forklift or skid steer that is a ford vee style motor, that's it. Also, ford STILL makes that motor! you can get them brand new in the crate VERY cheap
. However, you'd have to get your own marine
manifolds made up unless ford made some. But the motors can be had new in the crate, last time I looked, for around a grand, because Ford made millions of those motors and shipped them worldwide.
Just an idea or two. But if that motor you have is so rare that you can't even find it in a major boat salvage
yard, what will you do if it grenades while You're underway or in a foreign port? Admittedly a raw water
pump is a very important piece, but it can be bypassed if you're creative enough. However, if something ELSE breaks, can you bypass anything else?
The cheapest way I've seen to replace a sailboat motor is to find a yanmar
diesel motor that is used in a semi tractor trailer reefer trailer (the refrigerated trailers). Those reefer engines are diesel, usually get great mainteance because nobody wants to have a semi load of rotten meat on their hands. Plus most yanmar
engines that I've seen can be readily adapted to marine use, since they usually have the same engine blocks, just the mounts are way different. I bought a perfect runner, around 2000 hours, for a hundred bucks off ebay last year. Used it to repower
my riding lawn mower. Oddly enough, it was turbocharged too. (long trailer)
Also consider the older diesel motors that were used in refrigerated railroad cars. The old 4v71 motors were used in those, IIRC... Those can be had for a song from the rail yards as they are usually destroying the old reefer cars and building new ones. The older diesel motors aren't as clean, high tech, or efficient as a brand new diesel, but you can find them all over the globe. If it was me, I'd personally find a more common motor and sell that one while it still runs good to someone who has one already and is willing to pay a good price
for a complete runner. Its relative rarity might completely finance a swap to a more common engine!