What's the difference between Volvo AQAD41A's & AQAD41B's?

NigelChattin

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What\'s the difference between Volvo AQAD41A\'s & AQAD41B\'s?

Could anyone tell me what the difference is between Volvo AQAD41A's and AQAD41B's and when did the AQAD41B replace the AQAD41A?
 

rlw

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Re: What\'s the difference between Volvo AQAD41A\'s & AQAD41B\'s?

had an '89 SS Portofino with AQAD41A and now a 1992 Martinique with AD41B's

differences I know on 41B:

No flapper valve in exhaust
Rubber hoses for coolant instead of copper tubes
modified to smoke less on startup. In my case mega difference.


Rob
 

NigelChattin

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Re: What\'s the difference between Volvo AQAD41A\'s & AQAD41B\'s?

I'm thinking of buying a Martinique (1991) hence the question! What sort of speed and fuel consumption are you getting? Is yours a Martinique 36 or 38?
 

Medskipper

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Re: What\'s the difference between Volvo AQAD41A\'s & AQAD41B\'s?

I have 40Bs in my boat, so only 165.hp. mine consume 6 gals an hour each and thats exactely what the manufacturers spec says as well! absolutely spot on!

Barry
 

Wiggo

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Re: What\'s the difference between Volvo AQAD41A\'s & AQAD41B\'s?

[ QUOTE ]
We have 41A's in a Targa 33. Top speed 33 knots Consumption 7.5 galls per hour.

[/ QUOTE ]

Mmm. We have 43's and burn about 15 gal/hr. Why such a huge difference, or is that figure per engine?
 

KevB

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Re: What\'s the difference between Volvo AQAD41A\'s & AQAD41B\'s?

I've got twin 43's and do about 9 gals per hour total on average. I suspect the weight of your boat makes all the difference? mine is part 1 reg @ 10.99 tons but don't think that relates to the dry weight of the boat.
 

Wiggo

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Re: What\'s the difference between Volvo AQAD41A\'s & AQAD41B\'s?

We're 8 tons dry. Add 1 ton for fuel, 0.5 for water, 200Kg tender, 150Kg crane, 300Kg booze, 200Kg of shoes and it all adds up. But we're still only just over 10 tons loaded. I know we average about 1.3mpg based on fuel put in and miles logged, and an average speed of probably 15 knots (by the time you add in all the pottering out to sea and stuff), and I suppose that gets us to 11.5 gph. So a little better than I first thought, but still a little higher than you. Could be shafts vs legs, I suppose...
 

tamarind

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Re: What\'s the difference between Volvo AQAD41A\'s & AQAD41B\'s?

The change over was 1990/91. The injection system was altered to try to ilimininate smoking the 41a's did smoke alot, the 41b's still smoke but no where near as bad. 91 Martinique should have b's. It should say in paperwork
 
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