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Stan and Jeremy:
When you cruised tropical waters, what was the engine temperature. I just talked to the third owner of IDUNA and he said when they sailed the boat from Maine to St. Martin and back, the engine ran on the warm side as the sea water temperature increased. Have you made the same observations.
Thanks and Fair Winds,
Rod
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Rod,
At first I didn’t worry about the water temp. since I
had no gauge. Then I put in a gauge and worried
everytime it read a little high. Then the gauge broke
and I breathed a lot easier. But it still concerned me
that it might be running a little hot at times but
without consistancy.
Finally I thought I had it figured out that with the
variable pitch prop it was critical not to lug the
engine with too much pitch and high throtle. This
forces excessive fuel to be injected into the cylinder
which I guess doesn’t burn well and the engine seems
to run hotter.
With the proper pitch the engine doesn’t smoke and
runs cool enough to hold your hand for a short time on
the outside of the cylinder just below the head (this
is my newest temp gauge).
In practice I probably run it in the neighborhood of
1200 rpm (too slow to be good for it?). I can chug
along in calm water at about 5 knots with this rpm.
I don’t have an rpm gauge on it but borrowed one from
a mechanic once and at 1600 it sounded like a sewing
machine and at 1800 (its continuous rating)was scary.
I hope this is helpful. I don’t use it much and am
often surprised when I want it and it always works.
By the way, I sold the starter that came with the
engine back in '83 and have always started it by
hand. Now I’m thinking I could use a starter but the
original Bosch is terribly expensive. Someone
suggested finding the proper sized pinion gear and
putting a car starter on it. I put that on ‘the list’
but haven’t done anything about it yet. Any input?
best regards,
Stan Roeder
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Rod,
I installed an engine driven compressor for cold plate refrigeration. When I installed this, I installed a belt driven impeller pump, as the flow from the engine’s diaphragm pump was inadequate for the refrigeration system’s condenser. I also disconnected the diaphragm pump and the engine now gets its cooling water from the impeller pump. All of the cooling water goes through the condenser, but only some of it goes through the engine. The balance goes to a discharge in the cockpit. I have a valve on this “bypass” which lets me adjust the amount of water I’m pushing through the engine.
Consequently, I never had any problems with overheating. If anything, I suffered from over cooling and not allowing the engine to reach proper operating temperature, which is not good for the engine either. I did install a thermostat and overheat switch which was connected to an audible alarm. Like Stan, I do not have a tach and operate the engine based on ear and monitoring the appearance of the exhaust gas. The idea behind having the cooling water bypass discharge into the cockpit was to provide “in your face” evidence that you had proper cooling water flow.
In retrospect, I could have left the original engine cooling system alone, and setup the impeller pump to service only the refrig condenser.
Regards,
Jeremy
-----Original Message----- From: Rod Bruckdorfer [mailto:seagypsy@att.net] Sent: Monday, May 21, 2001 6:39 PM To: bcc@yahoogroups.com Subject: [bcc] SABB Engine Temperature in Tropical Waters
Stan and Jeremy:
When you cruised tropical waters, what was the engine temperature. I just talked to the third owner of IDUNA and he said when they sailed the boat from Maine to St. Martin and back, the engine ran on the warm side as the sea water temperature increased. Have you made the same observations.
Thanks and Fair Winds,
Rod
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