KAIKOURI – A Flashback
The 40’ Kaikoura was built in 1951 by P Vos. It is believed she was built for the owner of Kaikoura Island at the mouth of Fitzroy Harbour, Great Barrier Island, as transport between the island and Auckland.
She has always been a zoom zoomer – when launched she had twin165 engines that gave her a top speed of 25 knots. These days she is a regular compeditor (& winner) at CYA race events.
The flybridge was added in 1988, by then owner Stewart Bridgford,
20-06-2021 – Input on Kaikours’s twin Perkins 510, 8.36 liter, V8 4-stoke diesels from Mark Erskine
The 510 (cubic inch) V8 was the first V8 model manufactured by Perkins, UK in 1965 and were rated at 170 HP at 2,800 rpm and were used predominantly in trucks and a few bus models.
The 510 was followed by the more reliable, longer stroke 540 cubic inch V8 Perkins at 8.84 liters and 170 HP at 2,600 rpm.
Other than their considerable size and weight for a modest power output, the 510 (and 540) proved reliable enough in commercial vehicle operation, so would make good, reliable marine engines when run at constant lower revs and moderate loads.
“Kaikoura’s” previous Kermath inline 6-cylinder engines were side-valve (or “flat-head”) design and all side-valve engines have a lower crank center line to top of engine measurements than overhead valve and overhead cam inline design engines.
The lower engine height above crank shaft center line helps boat builders retain flat cabin floors in larger boat designs.
Most V8 design engines (including overhead valve) also have lower crankshaft center line to top of engine measurements because the cylinders and cylinder heads are inclined in “V” shape out either side of the crank shaft center line.
So although the 510 (and 540) Perkins V8 diesel engines are considerably larger and considerably heavier than the previous Kermath inline 6-cylinder engines for similar power output, the top of the Perkins V8 engine wouldn’t have been much higher than the top of the inline 6-cylinder Kermath side-valve, which means “Kaikoura” would have likely retained her same flat cabin flooring over the Perkins engines – a nice feature in all boats.
REMEMBER RIVERHEAD TAVERN LUNCH CRUISE ON SUNDAY – TIMES BELOW. Join in by car if you are boatless.