Originally Posted by dnimigon
Heh Catalina owners. My Catalina 30
having a 25 HP Universal engine
just doesn't seem to have the get up and go. Having bought the boat from previous owner, he had switched out the gas and installed a diesel
. When I had the boat out for bottom paint
I thought the prop was small but I wasn't sure. 2 bladed. The boat I know is heavy but when backing out of slip and then going into forward I have to rev it like snot to get it moving. Rev's are good, just no fast movements. I see other boats here in our marina moving around like no problem. Wind
becomes an issue when coming into slip. Is this the norm for this size of boat. I've looked at a different prop on Catalina direct. Possibly a 3 blade
but not sure if this is the fix. From a stand still it seems to take forever to get it moving. Yes it's heavy but is this normal. I'm not driving a ocean liner. Once moving the boat will move about 4-5 knots at full throttle going off my GPS
This all seems normal. When you are moving at 4-5 knots, what are the RPMs?
I have a Catalina 310 (31 feet so a little bigger and heavier) with a 23 hp diesel and 3 blade prop. I can get to hull speed
, 6.5 knots, at WOT (3,200 RPM) and cruise
at 5 knots at around 2,600 RPM
. My buddy has the same setup as you. He reaches the same speed as you under WOT. So I have to slow down to cruise
with him on windless days when we are powering. Another couple I know have a Catalina 36
that has a 25 hp diesel with a 2 blade
folding prop. They said they have the same type of performance. Going into a headwind with some chop I know both of them have trouble making 3 knots.
A 3 blade prop will definitely help with some of these issues and give you more bight/torque when in reverse. But it will slow you down some when sailing. Might not be to noticeable to you if you cruise/day sail but if you race
it may be a problem.
We cruise and wouldn't even think of doing it with a 2 blade
prop. I would spend the money
and get a 3 blade if I didn't have one already.
Hope this helped.