New 4 stroke 70hp prop

[bobbystout]

I bought a new xpress 18ss with a 70 4 stroke, i think the prop is too big, it has a 15 p power tech. the dealer said it would be ok manufactor said should have a 13p. When it is loaded it will not reach max rpms will on reach 4500.
it seems to lug down when loaded. Would the 13p make a difference.

[rodbolt17]

its either broke or way way way way over propped.
what year is it?

[bobbystout]

i bought it a few weeks ago it is a 2011

[rodbolt17]

operating range is something like 5300-6300 RPM.
its fuel injected.
its either broke or way way way over propped.
I will look when I get to wook if there is a test wheel for the F70.
but you have an issue.

[bobbystout]

I recieved and email form xpress they said that i should have a 13p on it. My dealer said he wold order one for me but it might be a week or more before it comes in.

[rodbolt17]

typically each inch of pitch change will give about 250 RPM up or down.
you need about 1800 RPM change.
I dont think its a prop issue
you need to have it run up on a test wheel, I dont have the test wheel part number here at the house but there is one.
seperates hull/prop issues from engine issues.

[bobbystout]

Ok i will talk to my dealer.

[bobbystout]

Dealer sent me a new power tech prop 13p installed it Friday now the max rpms is 5900. All seems to be good now.