1993 carver 430 low speed

W

wetbar

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Joined
Oct 9, 2014
RO Number
33766
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Hey I am buying a 1993 430 Carver and when we sea traied it - full throttle was 2800 RPM and only 18 Knots. Does this seem right? This is my first diesels so I am not sure what to expect. I have a 38 Gas twin 454 that runs about 30 Knots. 18 Knots just seems slow to me.

Thanks for the input
 
It might help if we knew what engines it has. 2800 might be way low or way high. What did your surveyor have to say about this?
 
The Carver 430CMY runs at about #30,000 with a deadrise of 11 degrees and a beam of 14'.
That is a lot of boat to get out of the water and up on plane especially when it tends to be aft heavy.
Are you sure that the boats bottom and running gear was completely clean before you had the sea trial?

The Cummins 6B at 5.9 liters and 300 hp would not be expected to get much more speed then what you have seen but perhaps a look at both the engines and props could yield some small increases. It is important that those Cummins are propped so they can reach full rated WOT rpm's plus 3-5% for a long life - at 2,800 they are right at rated speed.

FWIW - that same boat was offered with 454 gas engines (14 knot cruise) and also with larger Cat diesels at 375 Hp (19-20 knot cruise).

Hope this helps
 
Again, what did your surveyor say. was he concerned at the speed or did he feel like it was about right. Agree,that is a lot of boat to get up on plane. I used to have a Carver 3807 with twin 340 hp Mercs. We cruised at around 15 knots, top speed was probably 24 or so.
 
did you use tabs? Bottom clean?

I agree that is a lot of boat to plane with 600 HP. Check the maker plate to see what rated rpm is supposed to be and read the CPL number. It is not unusual for owners to over prop in a mistaken pursuit of better fuel economy.

if these are the 1613 CPL models 2800 is rated cruise will be less.
 
Thanks for all the help. I did check with the cumming tech and the surveyor and they both said this was right on target! He also added to the survey one of the engines was not aligned properly. This cause a vibration at speed. When I talked to the surveyor to start with, he said this needs to be repaired. When I asked the broker to make the repair he called the surveyor and then I got an email from the surveyor that this was not a big deal and I didn't need to worry about it. Is this a big deal? If I have to get this done on my own dime what would it cost ballpark?

Once again thanks for the help.
 
Before you do anything, I would have an actual conversation (not email) with the surveyor and ask why did he change his mind on this.

My question to you...who picked the surveyor? You or the broker?
 
"Before you do anything, I would have an actual conversation (not email) with the surveyor and ask why did he change his mind on this.
My question to you...who picked the surveyor? You or the broker?"

+1 to CWMS - a perfect answer to your question and the most important thing to do.

While an alignment often does not require parts and can be accomplished within a few hours the much more costly issues can come from the reason why the alignment is necessary and/or the results of running while out of alignment

Hope this helps
 
We had a couple sleaze-ball brokers reported to us over the years.
 
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