Donzi 43 ZR powerboat floated and fired-up at Penarth Marina

The Donzi 43 was lowered into the water by Penarth Quay Marina staff and prepared for service by Wigmore Wright
Her twin supercharged Mercury racing engines are installed in staggered formation powering twin NXT SSM racing outdrives.
Special additives were added to the tanks before the tanks were each filled with around 560 litres of gasoline. The boat has to be spun around to refuel the port-side tank..
Careful with the audio levels when owner Paul Smith calls"Fire in the hole" and starts the engines . The twin 700 SCi units are equipped with the Mercury Propulsion Control Module (PCM) 07 microprocessors. Each has a 3.3 Litre Lysholm screw-type supercharger, roller camshaft and sequential fuel injection . The engines deliver peak performance between 4800-5200 rpm and the boat is capable of speeds in excess of 100 mph.

[@duanepierson4375]

Engine Sounds Pure Music! In like that DanceMusic they overdub at HaulOver video. I watch it just for the boats, yeah right! 😜

[@chiefthiesen]

Beautiful boat - - love the "minimum sale 2 liter" on the gaspump!

[@randywheeler5387]

The only problem with this boat is I don't own it

[@pezzonovante888]

Is the purpose of turning the engines over before ignition to lubricate the cylinders? I see a lot of performance boats started like this and I'm wondering why. Is there a separate ignition switch to actually start the engine or do you just hold the key and let go before it fires up?

[@travisolson9190]

Im not entirely sure for boats like this one, but in aircraft, we do exactly that. Especially on cold morning. Cylinder wear is drastically decreased.

[@papadean.]

If you only looked at all the photos you would have seen the separate switches for the Ignition and starter circuits, in marine it is prudent to spin before ignition insuring no water in the cylinders that can destroy the piston ring lands or bend connecting rods.

[@dieseldog00]

Today I would rig a boat like this with twin Mercury 1100hp twin turbo engines. Less weight, less drag with two outdrives and more HP means better reliability and higher speeds.

[@pschardien]

Twin 700 SCI are not bad on this one. A buddy of mine has the same boat, only his is powered by twin Teague supercharged 1000's. It's a monster!

[@BrettTracyRealtor]

buddy of mine has 700 sci in his and i m not sure of the weight compared to fountain, cigarette etc.. but he can hit 100-105 depending on conditions... not sure of the herring prop size though...

[@newsnetuk]

@hpjunky70 Quickstor - Just for you I went back to the engineer who was filmed adding the chemicals before the gasoline (unleaded petrol) went into the tanks . He says he was adding Mercury "Quickstor" . This is stuff which is said to prevent regular and ethanol-blended fuel from breaking down and oxidizing, prevents fuel system corrosion and prevents gum and varnish from forming in the fuel and settling in fuel lines and tanks, carburetors and injectors.

[@ogmullens]

Donzi is the best

[@epicness646]

I will take that one right there

[@zackjakosh]

Why not go one more engine just for the hell of it?

[@ViperSRTnACR]

Mercury 700 SCI engines with NXT dry sump drives.

[@ธันยบูรณ์งามขํา]

I love metahash

[@dieseldog00]

And stagger them so the boat runs level for a better run angle.

[@JOSH50H]

How many pounds of boost