Outboard issue- New prop or something else? "stuck in the hole"
Submitted by saltyseamen on Tue, 2020-02-18 20:00
Hi guys,
I have recently purchased a 5.5 southwind (fibreglass) with a 130 yamaha 2 stroke salt water series outboard.
I find the boat is sluggish when moving above the speed of around 8 knots and then over-revs (35-40k rpm) without accelerating too much while trying to get on the plane.
It is also hard to drive at speeds from 10-20 knots.
Eventually it seems to engage and manages to get on the plane where it drives nicely (30+knts).
Do you think this is prop related or something else?
The hulls were originally owned by Yamaha so I dont think that it would be an issue with the length of the leg but i could be wrong.
Any ideas?
Cheers.
dodgy
Posts: 4563
Date Joined: 01/02/10
Sounds like a bit of
Sounds like a bit of cavitation. 8-17 knots or so is a bit of no mans land for boat speed. Too fast for putting around but too slow for a clean plane.
Does anyone know where the love of god goes, when the waves turn the minutes to hours?
SeperateKnob
Posts: 660
Date Joined: 28/11/16
Are you trimmed all the way
Are you trimmed all the way down when getting onto plane? Or too much weight aft? Maybe prop hub spinning however I wouldn’t believe so being able to get onto plane
sea-kem
Posts: 14857
Date Joined: 30/11/09
Definitely cavitation issue,
Definitely cavitation issue, prop change and all else fails a set of wings will get it up on the plane.
Love the West!
Faulkner Family
Posts: 17868
Date Joined: 11/03/08
Try playing around with the
Try playing around with the trim levels. I did that with my boat until I found the sweet spot.
RUSS and SANDY. A family that fishes together stays together
keg
Posts: 395
Date Joined: 17/07/07
check motor hieght
before you hit the water next time check the motor hieght on the transom
as a general rule of thumb the cavitation plate on the motor should be in line
with the bottom of the keel. if it`s too high you will get a lot of cavitiation.
Shark1
Posts: 1084
Date Joined: 21/05/12
if its a second hand boat -
if its a second hand boat - would expect the prop would be the right size
i m sure u would have trimmed it in and out by now
u might have spun the rubber bushing in the prop - it will get worse as time goes by till it only does about 5-6 kn
just for interest look up cavitation vs aeration - it wont be cavitation
i have a spare prop - would be a bit course for your boat - but would straight away tell u if it is the rubber
i m about 5 mins from a ramp - if u wanna bring the rig down we can chuck a prop on and go test it - will take about 30 minutes
in rocko
if u are NOR take the prop to Solas in o/park -they should eb able to check the rubber bushing- and they can push in new bushing
brown364
Posts: 247
Date Joined: 25/08/15
similar
Issue with the thunderbird with a 115 salty on it. I will follow this one and try the above mentioned to see if this makes a differance aswell. thanks for the input peeps.