reviving old seacraft (propeller question)

[sergiman]

hi ken, i was wongering what year your boat is and if it came with the rail, mine is a 1978 20' and came with no rail,and i would like to put one on it, great looking boat by the way, thanks mike.

[NoBones]

hi ken, i was wongering what year your boat is and if it came with the rail, mine is a 1978 20' and came with no rail,and i would like to put one on it, great looking boat by the way, thanks mike.

Hi Mike, The NoBones is titled as a 1970 built 11/69.
I bought the boat in 1989 from the original owner.
It was beat to death when I got her.
In 1980 the owner sent her back to SeaCraft to get re-done.
The Teak spray rails were added at that time.
We have discussed these rails here before. With the sharp entry of our hulls the rails help to deaden the re-entry and throw the spray away from the boat. I have been in 20's & 23's with and without, I'll take with....

See ya, Ken

PS: Thanks for the compliment.
BTW: As you are in Brunswick you should really try
to join us in April at Long Point. Check the gathering section for details.....

[gofastsandman]

Hey Bits,
BTW I like the moniker.

I have an`89 20 sf w/ a `96 Ocean pro 150 w/ good comp and finally runnin right after carb rebuild and etc, etc. I have a mich 14 1/2 X 17 wheel . Not sure if it`s an apollo or rapture, but from the bow lift I get, I would guess it`s a rapture.
I recently scored a 15 3/8 X 17 mirage plus at discount marine stuff in Stuart for a sly price. I will do a definitive ramp test when I get a new tank in.

I hate going to work, it interferes w/ my passion.

Fr. Frank and BigShrimpin were kind enough to enlighten me as to the subtleties and needs for our friends. Bow lift is BAD. Stern lift is necessary. This really hit home when I was home in Ma. on my brother`s Hialeah Mako `22. It has tabs and I don`t, but the angle of attack was very tight and it didn`t pound in tight chop as I experience. Maybe that`s why my console screws were floating?

I now spin 53/ 5400 at 37-39 mph gps 2 way run w/ 3, less than human, life forms, bimini and 210 lbs fuel last time coming in.
My brother Paul thinks I`ll only gain 2-3 mph , but I`m hoping for lotzzz more in many different ways. 45 anyone? Ok, maybe I`m a little optimistic. Ok , maybe a lot.

I`ll be happy with better overall handling and a nice big bite in a following sea.

GFS

GFS

[sergiman]

ken, sorry about that, no i meant the hand ss rails on the top of the hull. i have the teak rails like you said, and yes i will be coming down to longpoint,should be a great time time, can't wait to see the boats, a meet everybody.mike

[NoBones]

ken, sorry about that, no i meant the hand ss rails on the top of the hull. i have the teak rails like you said, and yes i will be coming down to longpoint,should be a great time time, can't wait to see the boats, a meet everybody.mike

Mike, glad you are coming to Long Point. By the looks of it
we all may need to stay till Monday just to
sober-up
I custom bent the grab rail on my 20 during the re-do.
Bought the stock from Surplus Unlimited in Daytona...
See ya soon, Ken

[Fr. Frank]

If the cavitation plate is exactly parallel with the keel line, or the front of the cavitation plate is higher than the rear, you need to adjust your mounting height upward.

Fr. Frank,
Could you verify that for this situation, the motor needs to be mounted higher?

OOPS!! I make a boo-boo. Sorry, guys.

Assuming a transom mounted engine, if the situation is just as described, where the motor ventilates too easily when trimmed, then no, the motor needs to be mounted LOWER.

LOWER LOWER LOWER

This should increase performance AND efficiency. It's about the angle of attack. The idea is to be able to fine-tune the angle of attack without introducing air to the back edges of the propeller blades. How much lower to mount is the unknown. I'd go one bolt hole to start.

[eggsuckindog]

Frank- Its all the way down on the transom now but its not that bad, I just can't get much more than a few degree's positive, just need a prop with a longer blade/rake and cup. Very similar to my 23 when we put the V8 on, the SST wheel would cavatate on the flats but a big long blade Protester was the ticket and you couldn't blow it out if you tried - which I did I think a Mirage + or Tempest will do fine, need a 19

[Fr. Frank]

I agree on the Mirage+, it's a great prop. But you may need a 17 or 18 to get max RPMS while heavily loaded. What kind of prop are you running now?

[eggsuckindog]

Standard Merc SS wheel with round sort of Mickey Mouse ear looking blades, probably great for most applications, gets the boat up very smooth and good at cruise.

[Fr. Frank]

I understand you're running a Black Max prop. What diameter and pitch? Have you ever had the cup increased? What are your max rpms now, fully loaded at max gross weight?