Trade-A-Boat — February 2018

quick specs

Yamaha F70A

TYPE Four-cylinder four-

stroke 16-valve EFI outboard

RATED BHP/MHP

69/70 at 5800

REC. RPM RANGE 5300 to

6300

DISPLACEMENT 996cc

BORE X STROKE 65 x

75mm

GEAR RATIO 2.33:1

WEIGHT 119kg (dry, long

shaft); 121kg (dry, extra-long

shaft)

PRICE AS TESTED $10,400

long shaft

OEDA STARS 3

“Three rocker arms operating

four valves. Very clever!”

sea trials

Sea Jay 485 Haven Sports side console with single Yamaha F70A and 15in

pitch alloy prop, total 950kg with three adults aboard. Average of two-way

runs over low chop

RPM SPEED (KTS) FUEL BURN (LT/H)

700 (slow troll) 2.2 0.7

3200 (min plane) 11.6 7.3

3500 (min cruise) 16.4 9.2

4000 (cruise) 18.3 10.3

5000 (max cruise) 24.8 15.9

6000 (WOT) 30.2 22.1

Cruise Craft 485 Explorer with single Yamaha F70A and 14in alloy prop, total

1100kg with three adults aboard. Average of two-way runs over low chop

RPM SPEED (KTS) FUEL BURN (LT/H)

700 (slow troll) 2 0.7

2000 (fast troll) 5.9 3.4

3800 (min plane) 12.9 10.7

4000 (min cruise) 14.3 11.3

5000 (max cruise) 21.8 14.8

6400 (WOT) 29.9 23.4

*Note on this hull the best fuel effi ciency was at 5000rpm. The speeds would be way

higher and fuel flow less on a Haines Hunter 445, for example, totalling around 800kg with

two adults aboard. Sea-trial data supplied by the author.

at 4000rpm despite running
alloy props and even at wide
open throttle were quiet.
Pity I didn’t have my decibel
meter but I estimate WOT
noise levels were
below 90dBA.

THE WRAP

The F70A is compact,

lightweight, easily

maintained and serviced,

and like all current Yammies

has a proven reputation

for survival in a marine

environment.

The demo engines

were supplied by

Yamaha Motor Australia,

Murrarie-QLD, phone

(07) 3906 7000. Or for

more details and dealer

locations, google Yamaha

Motor Australia.

tradeboats.com.au 151