Gould 0738 wrote:

Need to make some final decisions about the best cure for my engine problems.

Sorry to hear about your engine probs. Makes me glad we've got the Lehman instead



Anybody running a 6354 NA? I'd lose about 30HP, comparing the maximum ratings
of the two engines, but I typically run about 1800-1900 RPM with the 165 turbo.

You're already overpowered. Save the money and go NA.



I might lean toward the NA engine if I'm not going to lose anything more than
about 1/2 a knot...

Personally, I don't see how you're going to lose any speed at all unless it's a
prop issue. With 165HP you have about 70HP too much under any but the most extreme
conditions.





Another factor: Wife says there is another boat in our future. Not necessarily
in the next couple of years, but certainly prior to retirement. She has a few
items on her boat "wish list" that she thinks are missing from our present
boat. General question: If you were considering a 25-year old boat, would you
be much more likely to buy the boat and/or pay a few thousand extra if the
engine were 4-5 years old vs. a 25-year old engine with 600-800 hours on a
thoroughly documented rebuild?

Definitely save the money. A new engine is not going to bring up the market value
by as much as the cost of the engine. But you knew that, are you just fishing here?

We've also been toying with the idea of going to a bigger boat, but the problem is
(of course) that to get any meaningful increase in capacity & capability, the cost
scales up 'way 'way out of proportion. Which is a big reason why we chose the boat
we did.

Fair Skies- Doug King

Definitely save the money. A new engine is not going to bring up the market
value
by as much as the cost of the engine. But you knew that, are you just fishing
here?

Sort of fishing, but by the same token being about to get financially involved
in the solution of this thing doing a bit of a litmus test to make sure my
impression is accurate.

What kind of speed do you get with your Lehman? The NA Perkins has a similar HP
rating.

Gould 0738 wrote:


What kind of speed do you get with your Lehman? The NA Perkins has a similar HP
rating.

We have the 135 six cylinder and a four blade 24" X 21" prop. This gives us ~ 7 1/2
knots at 1500 RPM, burning ~ 1.5 gpm. For the first half of this year, we burned
1.3 gph. I occasionally crank it up to 2250, which puts us about 8.6 knots with a
clean bottom. I think if we were to travel any sustained distance at these revs,
we'd probably be burning 5 gph or more.

I like the quiet & the fuel economy. However, remember that diesels are best at 85
to 98% of their rated full load. Running a gas engines at low load is good, running
a diesel at low loads will cause premature wear. I think having a bit in hand for
waves & head winds is nice, but having an extra 50+ HP and lugging the engine all
the time is bad.

But then I am somewhat of an anti-horsepower freak. The amount of horsepower most
people think is desirable is beyond insane.

Fresh Breezes- Doug King

On Fri, 17 Oct 2003 21:39:02 -0400, DSK wrote:

Gould 0738 wrote:


What kind of speed do you get with your Lehman? The NA Perkins has a similar HP
rating.

We have the 135 six cylinder and a four blade 24" X 21" prop. This gives us ~ 7 1/2
knots at 1500 RPM, burning ~ 1.5 gpm. For the first half of this year, we burned
1.3 gph. I occasionally crank it up to 2250, which puts us about 8.6 knots with a
clean bottom. I think if we were to travel any sustained distance at these revs,
we'd probably be burning 5 gph or more.

I like the quiet & the fuel economy. However, remember that diesels are best at 85
to 98% of their rated full load. Running a gas engines at low load is good, running
a diesel at low loads will cause premature wear. I think having a bit in hand for
waves & head winds is nice, but having an extra 50+ HP and lugging the engine all
the time is bad.

The guy down the block has a Sonic 45SS parked on a trailer in front of his
house. Why someone would want a 3 engine missile to "blow $600 in gas going 85
knots in a day's running" is beyond me (his words). The boat cost twice what
his house does.

JJ

But then I am somewhat of an anti-horsepower freak. The amount of horsepower most
people think is desirable is beyond insane.

Fresh Breezes- Doug King


James Johnson
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