jps wrote:
I keep hearing that boat hours are different than normal applications--
that'd have diesels running constantly for those long-hour lives.

And, that low hour diesels should be gazed upon with suspicion (not that
any engine shouldn't be suspect) since infrequent use is not kindly to
diesel engine parts.

Is this baloney or is there some basis in fact?

jps

I say Baloney!

Check out Cummins. their Consolidated Diesel (the same type in the
dodge Pickup trucks) is very efficient. hold together well, and
replacement parts (if ever needed) are down to competetive marketing.
Cat is good stuff, but if you need anyting, hold on tight!
perkins is a cantankerous old engine that does well, but you don't get
the hr's out of them as you would the cat or cummins. a 2 cycle
Detroit was great in their day, but they like to leak oil regardless of
what configuration. They got a nink-name of "Drip-troit"

But they pushed boats for years. Odly enough, parts for the 2-cycle
"Jimmys' are high.
AND they suffer low end torque. you have to ahve them wound tight
(approx 24-2600 rpm) to get effeciency out of them.

I'd check out the marine versions of the 5.9 cummins myself.

I have this engine in my trawler and am very pleased with it so far. It
has 2200 hours and runs like a top. I switched it to Amsoil 15-40W
marine diesel oil run through a bypass filter and hope it will give me
20,000 hours. I run it between 1600 and 2000rpm and get about 3mpg. Ask
me when I'm even older and I'll tell you how it worked out.

Capt. Jeff

In article ,
says...


I have this engine in my trawler and am very pleased with it so far. It
has 2200 hours and runs like a top. I switched it to Amsoil 15-40W
marine diesel oil run through a bypass filter and hope it will give me
20,000 hours. I run it between 1600 and 2000rpm and get about 3mpg. Ask
me when I'm even older and I'll tell you how it worked out.

Capt. Jeff

Single screw? What sort of headway do you make at 2000 rpm?

jps

jps wrote:
In article ,
says...


I have this engine in my trawler and am very pleased with it so far. It
has 2200 hours and runs like a top. I switched it to Amsoil 15-40W
marine diesel oil run through a bypass filter and hope it will give me
20,000 hours. I run it between 1600 and 2000rpm and get about 3mpg. Ask
me when I'm even older and I'll tell you how it worked out.

Capt. Jeff

Single screw? What sort of headway do you make at 2000 rpm?

jps


You might want to go down to Chandler's Cove, see Dave Formo, and check
out a Camano Troll. Could resolve your speed vs economy dilema- at
least somewhat.

In article .com,
says...

jps wrote:
In article ,
says...


I have this engine in my trawler and am very pleased with it so far. It
has 2200 hours and runs like a top. I switched it to Amsoil 15-40W
marine diesel oil run through a bypass filter and hope it will give me
20,000 hours. I run it between 1600 and 2000rpm and get about 3mpg. Ask
me when I'm even older and I'll tell you how it worked out.

Capt. Jeff

Single screw? What sort of headway do you make at 2000 rpm?

jps


You might want to go down to Chandler's Cove, see Dave Formo, and check
out a Camano Troll. Could resolve your speed vs economy dilema- at
least somewhat.

The layouts don't do much for me, but that may change based on
prevailing circumstances.

Trawlers are beamy but spend so much sq. footage on walkarounds that the
cabin ends up too narrow for my taste. That's why I like the sundeck
version. It too has its weaknesses, especially if it has no cockpit.

Right now I'm far less concerned about speed than efficiency. I'm
resolved to 8 kts if that's what it takes.

jps

"jps" wrote in message
...
In article .com,
says...

jps wrote:
In article ,
says...


I have this engine in my trawler and am very pleased with it so far.
It
has 2200 hours and runs like a top. I switched it to Amsoil 15-40W
marine diesel oil run through a bypass filter and hope it will give
me
20,000 hours. I run it between 1600 and 2000rpm and get about 3mpg.
Ask
me when I'm even older and I'll tell you how it worked out.

Capt. Jeff

Single screw? What sort of headway do you make at 2000 rpm?

jps


You might want to go down to Chandler's Cove, see Dave Formo, and check
out a Camano Troll. Could resolve your speed vs economy dilema- at
least somewhat.

The layouts don't do much for me, but that may change based on
prevailing circumstances.

Trawlers are beamy but spend so much sq. footage on walkarounds that the
cabin ends up too narrow for my taste. That's why I like the sundeck
version. It too has its weaknesses, especially if it has no cockpit.

Right now I'm far less concerned about speed than efficiency. I'm
resolved to 8 kts if that's what it takes.

jps

I never realized how enjoyable it can be. If a boat only does 7-8 knots,
you don't expect anything else and begin to enjoy the characteristics of
that particular boat. One of the most pleasant afternoons on the water last
year was a relaxing, full speed run on the GB. Took a couple of hours,
didn't go very far, only burned about 5 or 6 gallons of fuel, but it was
genuinely enjoyable being able to relax and take in the sights.

RCE

In article .com,
says...

jps wrote:
In article ,
says...


I have this engine in my trawler and am very pleased with it so far. It
has 2200 hours and runs like a top. I switched it to Amsoil 15-40W
marine diesel oil run through a bypass filter and hope it will give me
20,000 hours. I run it between 1600 and 2000rpm and get about 3mpg. Ask
me when I'm even older and I'll tell you how it worked out.

Capt. Jeff

Single screw? What sort of headway do you make at 2000 rpm?

jps


You might want to go down to Chandler's Cove, see Dave Formo, and check
out a Camano Troll. Could resolve your speed vs economy dilema- at
least somewhat.

BTW, I hope you didn't take my response and question as disparaging or
tongue-in-cheek. I'm truly curious.

jps

jps wrote:
In article ,
says...
I have this engine in my trawler and am very pleased with it so far. It
has 2200 hours and runs like a top. I switched it to Amsoil 15-40W
marine diesel oil run through a bypass filter and hope it will give me
20,000 hours. I run it between 1600 and 2000rpm and get about 3mpg. Ask
me when I'm even older and I'll tell you how it worked out.

Capt. Jeff

Single screw? What sort of headway do you make at 2000 rpm?

jps
Single screw in a 36 Monk. It does about 9 knots at 2000 rpm, 8.5 at
1900 and a little over 8 at 1800, depending on how heavily I'm loaded.

I just did some research with Cummins and others to find out how slowly
the motor could be run for extended periods without problems. It's a
turbo and there are issues if the thing doesn't spool up fast enough and
heat up properly. i am told to go 1500 at a minimum, maybe 1600, but to
make sure it's running at the regular operating temperature.

I'm doing the Great Loop this year and the difference in operating costs
between getting 3 mpg and 3.5 mpg will buy a lot of beer.

Capt. Jeff

In article ,
says...
jps wrote:
In article ,
says...
I have this engine in my trawler and am very pleased with it so far. It
has 2200 hours and runs like a top. I switched it to Amsoil 15-40W
marine diesel oil run through a bypass filter and hope it will give me
20,000 hours. I run it between 1600 and 2000rpm and get about 3mpg. Ask
me when I'm even older and I'll tell you how it worked out.

Capt. Jeff

Single screw? What sort of headway do you make at 2000 rpm?

jps
Single screw in a 36 Monk. It does about 9 knots at 2000 rpm, 8.5 at
1900 and a little over 8 at 1800, depending on how heavily I'm loaded.

I just did some research with Cummins and others to find out how slowly
the motor could be run for extended periods without problems. It's a
turbo and there are issues if the thing doesn't spool up fast enough and
heat up properly. i am told to go 1500 at a minimum, maybe 1600, but to
make sure it's running at the regular operating temperature.

I'm doing the Great Loop this year and the difference in operating costs
between getting 3 mpg and 3.5 mpg will buy a lot of beer.

Capt. Jeff


Cool, thanks for the info. Having grown up with twins, I'm in awe of
those who dock their singles in tight spaces, especially the ones
without a thruster...

jps