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#1
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Engine options....decisions, decisions, decisions....
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. |
#2
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Engine options....decisions, decisions, decisions....
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 |
#3
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Engine options....decisions, decisions, decisions....
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 remove the "dot" from after sail in email address to reply |
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