"mickey" wrote in
oups.com:

Granted it's late, but I don't really get what you're saying so I must
not have made myself clear. The Heat exchanger is on the engine, and
the only reason the loop is there is because of the water heater.


Oh, I thought you were saying all the cooling water went through the water
heater and it wouldn't have cooling if you closed off that line entirely.
I was saying those hoses were simply extra and not part of the cooling
plumbing other than to be teed into them, like a car heater.

I'm sure they're both plumbed the same. The old engine and this
replacement that came out of someone's sloop were plumbed the same.
Lionheart has a shaft alternator so we leave the shaft turning under sail
all the time to charge the beasts (four L-16s). So, we kept the larger
hydraulic transmission from the old engine in the boat, thinking the
smaller transmission wasn't meant to be free wheeled all the time. The
hoses connected on the engine to the same spigots.

--
Larry

Now I have this terrible hankering to go to the marina and play around in
her bilge this weekend....(c;

Larry:
I think you are right that I do have injector issues, but I think they are
just old. The engine starts as soon as the key is turned. The only smoke is
a black puff when you floor it and maybe a little black when at full
throttle. The prop is clean and from all acounts was correctly sized by the
boat builder 17X17. Hull speed is reached at about 2K at one gallon per
hour, full throttle in gear is 3K, in nuetral is 4K+ (max rpm per Perkins).
My plan is to replace the injectors myself then hire a mechanic to adjust
the valves and check the pump timing. I hope this will get me more economy
as I have more than enough power now. The more I work on it the more I think
of pulling it out and rebuilding. The savings in leaking oil would pay for
it in 5 years or so.
- Allen

"bushman" wrote in
m:

Larry:
I think you are right that I do have injector issues

There's your overheat problem. The sooner you fix it, the sooner it will
stop overheating. Lionheart's 4-108 barely opens the thermostat, even at
WOT, now.

I didn't learn about this injection from boats. I have a 1973 Mercedes
220D taxi cab I restored. Before the restoration, at about 350,000 miles,
the engine ran about 85-90C in normal driving. When it was restored, the
mechanic said we should put on a rebuilt pump from an old German guy in
California who's been rebuilding them for 40 years. I agreed and am glad I
did. The restored engine gets 38mpg on a 5000# car and never reaches 80C
on a really hot South Carolina day with its AC running full open. Although
it's only 57hp, virtually the same size as the Perkins, at 70 mph it no
longer sounds labored cruising along. It has more power and doesn't smoke,
at all, until you're accelerating wide open. Injection timing is
controlled by a lambskin diaphram and a bellcrank to the throttle...totally
mechanical. I expect it to outlive me, easily.

--
Larry

too bad you don't see many Mercedes diesels in boats this side of the
pond. I've a 1985 300SD just shy of 300K, and it runs like a dream.

"mickey" wrote in
oups.com:

too bad you don't see many Mercedes diesels in boats this side of the
pond. I've a 1985 300SD just shy of 300K, and it runs like a dream.



Me, too. 1983 (European 82) 300TD estate wagon. 428K on it this morning.
The shift knob on the automatic transmission needs replacing...(c;

--
Larry