Apache 41 Razz

Portofino

Portofino

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Go from 6.0 to around 7.5 for the best .

Not an Apache but there is an alloy hull of a racing boat on the entrance of a marina near San Remo with the motors striped out .I was amazed at the strengthening inside .A series of alloy struts in triangles. Like angle iron shaped forming a lattice in the hull .Deep V for sure but you could see , imagine the forces / pounding the thing was designed to stand .

Wonder how theses stand up to surveys ??

Then there’s the mechanical over revving thing .It’s how you bend rods .The suggestion is take the bottom pan off and shove a straight instrument up the central lub channel to see it it binds .Or something like that ? Rods can bend a bit and the motor still seemingly run ok to a point .

Interesting niche market I guess / minefield ?

 
In the summer of 2007, in the port of St Tropez, we were moored a few berths up from an Apache 42 called Tsunami. Chatted to the owner (i assumed) briefly who's summary of the boat was 'this boat rocks, man!'
Screenshot from 2022-01-31 11-18-13.png
He took it out every day we were there and even when it was barely a dot on the horizon you could still hear it.
It started up as we were passing one day..... I thought something had blown up.
 
Quite a remarkable engine the Merc 1050 .
Mercury Racing's New 1050 HP Specs - Offshoreonly.com

Superchargers that are designed for constant running . :) Two of them btw .Scroll type quieter and you don’t get the clash of rotors and scream +potential chip formation with the risk of cylinder ingestion like the rootes type Oguras that VP use .

Merc know a thing or two about engine building and the American expect nothing less than the best .
 
stelican said:
90 day warranty:(
Click to expand...
Good point .
Players in this stratospheric Hp league say race it rebuild every 100 hrs , none race maybe 200 + hrs .

They did as time went by up the Hp to more iirc 1350 a side .

I think buying other than new it’s all about confidence of the motors or factor in a straight pull and rebuild as soon as you get it and go from there .

I guess with ECU s and right reader you might be able see how many times it’s been over revved , or a dealer with the right equipment.
I know Ferrari can and they do hook it up to see how good or naughty you have been with the motors .They can see how much stick it’s had .Not bothered at part ex about curbed alloys or stone chips on the nose as they can fix those for tuppence.

Just like one of theses surveyor finds a few gel coat dings , a nav light bulb out or a 8uggered bilge pump ….so what ?
 
How do you overrev a boat engine?

Genuine quuestion - not trying to be obtuse.......

My thinking is as follows - Petrol Engines these days have rev limiters, they usually have a soft cut and a hard cut, The soft cut is usually set a few hundred rpm lower than the hard cut. When the soft cut rpm is reached, the ecu stops sending the spark to the spark plugs, which should slow the engine down, if it doesnt, and the engine reaches the hard cut speed, the ecu then cuts the fuel. So these limiters make it pretty hard to overrev an engine by using the throttle alone.

Now despite these rev limiters a car can still be over-reved by the driver selecting the wrong gear, eg they meant to go from 3rd to 4th gear, but instead they selected 2nd, and all of a sudden the engine is being driven by the wheels and regardless of the rev limiter in the ecu it overrevs and bends con rods etc.

But how do you overrev a boat? if the boat comes out of the water over a wave and the prop suddenly has no resistance because its spinning in air , the ecu rev limiters should handle that?

It must be possible, buthow?
 
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