The prices quoted sound about normal for Australia
to me. I didn't say they were OK, just normal.
In the OP's situation I would stop and have a really long think about this one. If the diagnoses of insufficient anti corrosives in the coolant
is correct then the engine is most likely a small time bomb. And no amount of test runs are going to reveal the issues, what will reveal the issues will be a hard slog into the wind
, or a messy approach to a harbour, or some other boating
manoeuvre where it matters whether the engine is ok. That's when it is going to fail from internal corrosion
. Therefore, any money
spent on a heat exchanger
, no matter how economical, may well be wasted money
Certainly I would not spend any significant money on the engine, and since pulling it apart to see how much damage has been done will be a very significant cost there's a bit of a catch 22 here. If you can do the work yourself the at least that problem will be reduced but even a gasket
kit for the engine could run to hundreds of dollars and the OP has indicated a limited level of experience which to my mind suggests a home job is not an option, not as a learner on a marine
I agree that an outboard on a Roberts 25 will not be great, but if budget
is tight, this may be about the only way to get a TRUSTWORTHY engine on the boat. Performance will be limiting, grip will be a problem, and if you have to throw a set of remote
controls into the equation it is going to be the better part of the quoted replacement cost anyway.
One thing I would consider is seeing if a replacement engine of the same make and model can be found cheap
enough to warrant a pre installation
checkup. A 10hp is not going to be a monster to handle and you could easily drive it around in the back of a station wagon to a non marine diesel mechanic
for a checkup first. If you get lucky and find a good one then replacing like for like should be a pleasant and rewarding project
that will bring you much confidence in both the engine and your ability to maintain it into the future. This is the approach I have taken with our engine when I purchased a decent short block and injectors from a truck wrecker to keep on hand for an emergency
. If our elderly engine dies tomorrow I will just strip off the marinisation components and fit them to the new block. The block is in the attic wrapped in industrial glad wrap. It was bought for less than it would cost to have a marine diesel mechanic visit our boat.
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