Cummins QSB 5.9L 425bhp

Cozzy

Cozzy

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I am currently looking at a 43ft Flybridge with these engines and request forum advice please.

Web search is mostly positive so I'm wondering why they are not more popular v VP D6 for instance.
 
The forum engine expert, Latestarter1, rates these as the very best marine engines, and he really knows his stuff. I believe that VP have helped boat builders by not charging for their engines until they are installed, which obviously is good for cash flow.
 
A friend has the 350 QSB's in his Azimut. They are incredibly quiet compared to my Caterpiilars. He has owned his boat for 8 years, no problems to date.
 
Good to know - thanks.

The boat I'm looking at is 2008 and half the price of current crop ie: Sealine F450.
Hours are 200 and like your friends Azimut, very reliable.
 
Cozzy said:
I am currently looking at a 43ft Flybridge with these engines and request forum advice please.

Web search is mostly positive so I'm wondering why they are not more popular v VP D6 for instance.
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From my experience of these motors I would have one over a D6 anytime, they are smoother and quieter, probably due to them not revving so high, and they are straightforward to work on.
 
Cozzy said:
Good to know - thanks.

The boat I'm looking at is 2008 and half the price of current crop ie: Sealine F450.
Hours are 200 and like your friends Azimut, very reliable.
Click to expand...

35 hours a year is very low use, which is not always a good thing. Check they gave been serviced correctly and if let to stand for long periods been properly decommissioned.
 
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Whitelighter said:
35 hours a year is very low use, which is not always a good thing. Check they gave been serviced correctly and if let to stand for long periods been properly decommissioned.
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I would be reasonably relaxed, QSB has huge reserves in the base engine. Agree that 'marine aging' will require charge air cooler service if not already done and Sealine being Sealine expect fuel filtration will meet bare minimum required by Cummins water is ever present enemy particularly with long periods idle. Expect raw water pumps to be weeping.

QSB seems popular with the Volvo Penta techs here and they can service it even under warranty, D6 is nice engine and the only other motor which come near it, however QSB has a bit more meat on the bone for example automotive cousin the ISB leads a tough life, market leader in UK bus applications, as good as D6 is could you imagine it doing this job for 12 hours a day 7 days a week with lube oil drained annually, ISB does, which is what I meant when I said no sensitive flower.

Somebody tell why I always get two attachments!
 
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Latestarter1 said:
View attachment 45235View attachment 45235

I would be reasonably relaxed, QSB has huge reserves in the base engine. Agree that 'marine aging' will require charge air cooler service if not already done and Sealine being Sealine expect fuel filtration will meet bare minimum required by Cummins water is ever present enemy particularly with long periods idle. Expect raw water pumps to be weeping.

QSB seems popular with the Volvo Penta techs here and they can service it even under warranty, D6 is nice engine and the only other motor which come near it, however QSB has a bit more meat on the bone for example automotive cousin the ISB leads a tough life, market leader in UK bus applications, as good as D6 is could you imagine it doing this job for 12 hours a day 7 days a week with lube oil drained annually, ISB does, which is what I meant when I said no sensitive flower.

Somebody tell why I always get two attachments!
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That sounds good Latestarter, thank you.

The boat in question has been idle for over a year and the couple who owned it rarely travelled more than 20 miles per trip. Apparently they preferred to motor around a couple of headlands and anchored off a local beach not 5 miles away. The longest trip logged was 55 miles.

We will be having a look on Wednesday but "no sea trial without a deposit". I won't bother looking at mechanicals too much on this occasion as it's more about my SO having a look at the boat in general.

I will no doubt have some mechanical questions should we decide to proceed.
 
Cozzy said:
That sounds good Latestarter, thank you.

The boat in question has been idle for over a year and the couple who owned it rarely travelled more than 20 miles per trip. Apparently they preferred to motor around a couple of headlands and anchored off a local beach not 5 miles away. The longest trip logged was 55 miles.

We will be having a look on Wednesday but "no sea trial without a deposit". I won't bother looking at mechanicals too much on this occasion as it's more about my SO having a look at the boat in general.

I will no doubt have some mechanical questions should we decide to proceed.
Click to expand...

Visual inspection will tell you a lot, take a few general engine pictures.

Ask at least if engines can be started, they should fire up with absence of any visible smoke.

Any questions just shout.

When you get further down the line and ECM download will tell you the engine history, average % engine load, total fuel burned, any overheat codes.

Good luck for tomorrow
 
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