Boat speed ??

[pockets]

Just looking for info on boat speeds.
My 4.75 alleycraft has a 60 fourstoke Merc. Im getting about 27knots at 5000 revs.
Is this good or bad and how far should you rev a four stroke? havn't had it long dont know what to expect. last motor was 90 johno so they are completely different.

[polydriver]

4.55 poly cuddy cab
50hp 4 stroke
2 adults and gear
WOT 49.3 kph @ 6300 rpm (GPS)
usually cruise at 35kph @ 5-5300 rpm as this is amazingly economical.

[Maverick79]

Haines Signature 1550r
Evenrude 70hp
60km at 5200
cruise 45km/h 3 adults and gear

Would like to see what it would do with a 125 as it is rated for would do great boat

[familyman]

Sportsman craft 4.6
115merc
stainless prop pitch unknown
3200 rpm 25 knots
4000 rpm 35 knots
never had it any faster :o

[Robbo_Townsville]

Cyclone 5.4 metres
45mph 5100rpm
2 adults and gear

[Morlers]

Haines Hunter Breeze 5.1
90hp Johnson 4 stroke
Stainless Steel prop 13 7/8 dia x 19 pitch
normal cruise 4000rpm @ 19knots (35kph)
fast cruise 4500rpm @ 23knots (43kph)
wot 5600prm @ 31knots (57kph)
2 adults plus gear
so far have averaged 10 ltr/hr or 2.2klm/ltr

:) :)

Morlers

[mr_phishy]

my quintrex hunter 445 with 50 yamaha does 31kts wot.

[aussiebasser]

Just looking for info on boat speeds.
My 4.75 alleycraft has a 60 fourstoke Merc. Im getting about 27knots at 5000 revs.
Is this good or bad and how far should you rev a four stroke? havn't had it long dont know what to expect. last motor was 90 johno so they are completely different.


60 EFI Fourstroke Merc revs to about 6000rpm. If you're not getting that, you may need a prop with less pitch.

[pockets]

woops error in original post should be 27 mph (not knots). Im just not sure how far I can or should take the revs up to.

thanks for the replies to compare to guys