Diesel ribs? - Page 2

Mollers · 28 March 2016, 20:26

Quote:

Originally Posted by jwalker

Hehe, that's lucky! It will, there's always a first.

Possibly. My BJ off of the Queen will also be a first.

jwalker · 28 March 2016, 20:27

Come to think of it, don't inboard petrol engines require spark free engine compartment blowers which must run to evacuate the engine bay before starting the motor?

jwalker · 28 March 2016, 20:29

Quote:

Originally Posted by Mollers

Possibly. My BJ off of the Queen will also be a first.

Well yours might be but I'd put money on it not being a first for queenie!!

Mollers · 28 March 2016, 20:35

Quote:

Originally Posted by jwalker

Come to think of it, don't inboard petrol engines require spark free engine compartment blowers which must run to evacuate the engine bay before starting the motor?

Yep, otherwise they'll blow families clean out of the marina.

willk · 28 March 2016, 20:46

There's a bit of thread drift here (surprise!) but no harm. I'm not sure exploding boat concerns would have been the OP's first concern - but no matter. I've played with a lot of petrol on and around boats - it gives me the willies. It has to be carried in cars, filled and spilled and stored in cans on deck quite often. I've been on and heard of boats with minor and more serious petrol leaks. I recall one boat of the Conway Crew bursting a tank and filling the bilges with petrol - halfway to the IOM. I hate the stuff in my van - hate it - even the small 12L for the egg whisk.

BTW, I know a bloke who lost a RIB to a petrol fire on it's maiden voyage - he swam ashore, buh-bye new RIB

I'm sure diesel boats burn too - but it's a different level of risk by a long way.

willk · 28 March 2016, 20:48

Quote:

Originally Posted by jwalker

Well yours might be but I'd put money on it not being a first for queenie!!

As QE2 is "above politics" I'll allow that one...

Mollers · 28 March 2016, 20:50

Quote:

Originally Posted by willk

There's a bit of thread drift here (surprise!) but no harm. I'm not sure exploding boat concerns would have been the OP's first concern - but no matter. I've played with a lot of petrol on and around boats - it gives me the willies. It has to be carried in cars, filled and spilled and stored in cans on deck quite often. I've been on and heard of boats with minor and more serious petrol leaks. I recall one boat of the Conway Crew bursting a tank and filling the bilges with petrol - halfway to the IOM. I hate the stuff in my van - hate it - even the small 12L for the egg whisk.

BTW, I know a bloke who lost a RIB to a petrol fire on it's maiden voyage - he swam ashore, buh-bye new RIB

I'm sure diesel boats burn too - but it's a different level of risk by a long way.

Poof!

willk · 28 March 2016, 20:53

Quote:

Originally Posted by Mollers

Poof!

Am not!

Mollers · 28 March 2016, 20:57

Quote:

Originally Posted by willk

Am not!

Sure?

GuyC · 28 March 2016, 21:12

In the commercial marine world - small commercial vessels, workboats, pilot boats, naval vessels, yachts etc, petrol is treated as being of a much higher risk than diesel. This is in terms of quantities carried, ventilation, drainage, ability to boundary cool, firefighting, gas detection, electrical safety.

There are other pro's and con's - price, availability, power to weight / size.

Engine hours - looking at the car world, diesels tend to last longer than petrols. I would say maintenance is more important than hours. A rebuild with OEM parts wouldn't concern me too much.

I've got a Pacific 22 and yes, it is noisy, smelly and slow but being the marine equivalent of a Toyota Hilux is one of its endearing qualities.

Daniel · 28 March 2016, 22:18

I'm fairly sure inboard petrol engines can not be coded. Says something.

To address OP's questions, as others have said im personally unsure of the merits of a diesel in a 6.5m or less, a boat you'd typically be trailering. The second hand choice here will be small partly because the choice of engine & drive for this size package is also small.

7.5m+ and diesel would be my choice, if initial outlay not of concern. An 8m diesel is perhaps 150% - 200% of the cost of an 8m outboard petrol boat.

Ive been in this dilema for a while. Ive always thought the next boat will be diesel but for the same £££ one gets more of a boat by going petrol outboard again... Finally I am putting together an 8.1 diesel scorpion to replace my 7.5 petrol version of the same boat.

willk · 28 March 2016, 22:29

Quote:

Originally Posted by Daniel

Finally I am putting together an 8.1 diesel scorpion to replace my 7.5 petrol version of the same boat.

Out of interest - what swayed your decision?

Daniel · 29 March 2016, 07:40

Availability and ease of refuelling.

Ask me in 6 mths if I prefer a diesel RIB ! I am realistic, it's heavier, will be less responsive, harder to haul about and launch / recover and more expensive to maintain.

Maximus · 29 March 2016, 09:11

Quote:

Originally Posted by Daniel

Availability and ease of refuelling.

Ask me in 6 mths if I prefer a diesel RIB ! I am realistic, it's heavier, will be less responsive, harder to haul about and launch / recover and more expensive to maintain.

I for one will look forward to the unbiased Feedback

I've always found the Turbo lag and lack of punch in Handleing (on the ones I've tried) a Big hurdle for the type of Boat I do (at pressent) although I do recognise the advantages...especially in larger Rigs.

Mollers · 29 March 2016, 10:14

Quote:

Originally Posted by Maximus

I for one will look forward to the unbiased Feedback

Me too, it would be refreshing.

willk · 29 March 2016, 10:19

Quote:

Originally Posted by Maximus

I've always found the Turbo lag...

You've been looking in the wrong engines

https://www.yanmar.com/media/global/...Zdatasheet.pdf

Fender · 29 March 2016, 10:37

Quote:

Originally Posted by Maximus

I for one will look forward to the unbiased Feedback

I've always found the Turbo lag and lack of punch in Handleing (on the ones I've tried) a Big hurdle for the type of Boat I do (at pressent) although I do recognise the advantages...especially in larger Rigs.

Went out in my mates 7.5-8m (??) scorpion last summer, think it was running a 260 yanmar??? I can't remember, however I do remember the lag, he said it was slow off the mark

So we're sat there, he throttles up, nothing, then nothing and still nothing, I'm thinking by this time something's wrong, matey then turns around and says if your not constantly trimming the leg it takes even longer to get onto the plane

Think I'd rather sit on a 'floating bomb' ( which don't ever exploded

) than die of old age waiting for something to happen!

willk · 29 March 2016, 11:47

Quote:

Originally Posted by Fender

Went out in my mates 7.5-8m (??) scorpion last summer, think it was running a 260 yanmar??? I can't remember, however I do remember the lag, he said it was slow off the mark

So we're sat there, he throttles up, nothing, then nothing and still nothing, I'm thinking by this time something's wrong, matey then turns around and says if your not constantly trimming the leg it takes even longer to get onto the plane

Think I'd rather sit on a 'floating bomb' ( which don't ever exploded

) than die of old age waiting for something to happen!

Wheezy 240hp old school Yanmar diesel on a 8m "sports" rib? Horribly underpowered - no wonder he was twiddling with the trim!

Try that same rib with a 370hp V8 twin turbo Yanmar 8LV

Last Tango · 29 March 2016, 11:57

Quote:

Originally Posted by willk

Avoid all the Quicksilver engines. You'll see Volvos, VWs, Yamahas, Yanmars and Cummins.

I thought the Quicksilver engines were Cummins ?

C-NUMB · 29 March 2016, 12:01

Wonder how the Hyundai SeasAll engines are, the new s270 has a reasonable good power/weight ratio. Have not heard much about them, good or bad.