4 blade or 3 blade prop best for waterskiing ?
Chester
16 foot Chrysler boat with a 1983 Johnson 140 HP, the boat is rated
for 115 Hp .
The prop that is on it now is 12 3/4 by 21 . The manual for the motor
suggests a 13 by 19 prop. Both three blade props.
I called the local boat place and the guy there recommended a 4 blade
Merc prop with a conversion thingy to make it fit my motor. I have two
girls that are going to try to learn hoe to ski this summer plus we
will be doing some tube pulling. So I am wondering what I should do ,
if anything , to change the prop ?
Do I really need a full out hard hole shot for kids that are learning
to ski with two skis on ? Would one of those "wing" things that go
onto the hydrofoil thingy be advantageous ?
Thanks for any advise
Dino Ortaloni
news:834fdaba.0306...@posting.google.com:
> I just sold my 13 ft Searay Laguna with a 25 Hp merc and bought 1974
> 16 foot Chrysler boat with a 1983 Johnson 140 HP, the boat is rated
> for 115 Hp .
> The prop that is on it now is 12 3/4 by 21 . The manual for the motor
> suggests a 13 by 19 prop. Both three blade props.
>
I would suggest getting the proper motor for your boat. With that
size boat and that engine, it doesn't matter what the prop is, you will
have an excess of pulling power....If the safety concern is not an
issue for you (although it should be) you may want to consider the
insurance aspect...I doubt that the underwriter would cover any loss
once they found out that the boat was over powered...
Bill Andersen
much.
I added a hydrofoil to my outdrive (MerCruiser I/O) to keep the bow from
rising when towing wakeboarders. Wakeboarding is done at just about my
planing speed and the first time we tried it was very uncomfortable driving
around with the bow pointing to the sky, severely reducing forward
visibility. With the foil, the bow hardly rises, I get on plane sooner and
stay on plane longer: great for slow speed water sports.
The fin I bought was in a plain wrapper fro less than $20. I think it's a
Hydrofoil, that sells for about $30 in a marked package. There are more
expensive fins available - I don't know what else they could offer, since
the cheapie works OK.
"Chester" <che...@dragbike.com> wrote in message
news:834fdaba.0306...@posting.google.com...
Woodchuck
more blade to grab the water which should help the initial pull. Don't see a
need for a 4 blade prop. Dropping pitch from 21 to 19 will also help. But
always remember to watch the WOT rpm. Over powered by 25hp shouldn't be an
issue as it takes 12-15hp to gain 1 mph!
"Chester" <che...@dragbike.com> wrote in message
news:834fdaba.0306...@posting.google.com...
Chester
boat and replacing it with this one. I was going to put a 40 hp on
the Searay (rated for 25) but that was going to cost me about $5000.
So I sold it and bought used and the cost was only about $2000 in the
difference.
The extra horsepower doesnt have to be used but when I am just risking
my own safety or that of a consenting adult I will have to use it. My
other hobby craft is an 1166 cc turbocharged Suzuki drag bike so I
just love to have that big power grin on my face !
I will buy the 19 pitch prop and have it for a spare and also try the
hydrofoil thing. What speed do you use for the wakeboarding. I should
get one of those cause aI bet they are more fun than a tube ?
Gary Martin
additional horsepower. Since the outboard is hanging off the transom, it's
putting additional stress on the transom.
One thing to keep in mind regarding those "fins" one can use to improve
planing time: If you get into choppy water, where there will be even some
mild slamming (hard vertical contact with water, coming down on a crest,
etc) then you run a risk of snappy that fin off and damaging the anticav
plate of your motor where you had it bolted. I'm speaking from personel
experience there. Had a DoelFin brand on a 235 Johnson V6 outboard in 84,
jumped a wake and when we came down it snapped the fin off and put a left a
large chunk of the anticav plate missing. (very expensive to have
repaired).
For what it's worth........
Gary Martin
290 Searay Sundancer
"Chester" <che...@dragbike.com> wrote in message
news:834fdaba.03060...@posting.google.com...
Dino Ortaloni
> The extra horsepower doesnt have to be used but when I am just risking
> my own safety or that of a consenting adult I will have to use it. My
> other hobby craft is an 1166 cc turbocharged Suzuki drag bike so I
> just love to have that big power grin on my face !
what about the safety of those boaters who you may crash into? or the
safety of the rescuers trying to save your 'consenting adult' butt? are
you going to self insure yourself or just lie to the insurance company?
Chester
when going out for activities other than skiing.
Good point about the liability, the guy who owned the boat before me
had it insured so I assume I casn to.
Ross Berg
What an Idiot whiner....
Clams Canino
Dino, you are blathering.........
Speaking as a Merc guy - the difference between a Merc 115 and 140 was
negligable. SO negligable in fact that thier 140 of 1981 became the 115
(propshaft rated) of 1982 - and the 115 became the 90 (propshaft rated)
So long as the 140 isn't too much weight for the transom I don't see a real
issue. Nothing decals can't fix anyway. <g>
-W
"Dino Ortaloni" <ff...@hotmail.com> wrote in message
news:Xns938F86A...@24.71.223.159...
> >
Trainfan1
though. I think the one in question here is a looper.
Rob
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"Clams Canino" <b17of...@nospam.hotmail.com> wrote in message
news:iGMEa.1177329$S_4.1201408@rwcrnsc53...
Dino Ortaloni
news:eafce16.03060...@posting.google.com:
That was insightful.......glad you are not on my lake...