Re: bolger diablo (15ft)

Hugo,

Thanks for the input on motors. I already have a 9.9hp Suzuki 4-
stroke, and I'm not going to be purchasing another motor. My #1 goal
is to get the most capability, performance, and ease of construction
package that I possibly can without spending any more money than I
have to.

If I can get an efficent 16-20 mph out of the Diablo with the 9.9hp,
that suits me fine. Where I operate in Charleston harbor, the chop is
going to limit me to about that speed anyway so the pounding won't be
too bad.

Stacey

--- Inbolger@yahoogroups.com, Hugo Tyson <hhetyson@y...> wrote:
> 20 HP would be fine on a Diablo (So would a 15HP 4 stroke with the
right propeller), you may lose a few mphs top speed but probably no
more than about 5mph. Most 20 and 25 HP outboards are exactly the
same engines ( from my reading of Mercury's 2003 catalogue) but the
larger HP just has a different carburettor and in some cases a
slightly higher rev range.
>
> I believe a Diablo could safely handle 40HP with a sensible and
experienced user and a bit of strengthening in the transom and floor
to stop them flexing.
>
> If I was going to buy an outboard for my Diablo again I'd probably
checkout a 15HP 4 stroke and get the right prop so she'd do about 20
mph, maybe a little better, without that vile and annoying roar of a
two stroke motor!
>
> Hugo Tyson, Launceston, Tasmania, Australia.
>
> tysond99 <tysond99@y...> wrote:
> Hugo,
> Do you think your diablo would do all right with only 20hp and two
> people or would it bog down too much. Many of the lakes here in
> Pennsylvania have a 20hp limit so I thought I might build with that
> in mind.
> Don--- Inbolger@yahoogroups.com, Hugo Tyson <hhetyson@y...> wrote:
> >
> >
>
>
>
> ---------------------------------
> Find local movie times and trailers on Yahoo! Movies.
>
>
> [Non-text portions of this message have been removed]
20 HP would be fine on a Diablo (So would a 15HP 4 stroke with the right propeller), you may lose a few mphs top speed but probably no more than about 5mph. Most 20 and 25 HP outboards are exactly the same engines ( from my reading of Mercury's 2003 catalogue) but the larger HP just has a different carburettor and in some cases a slightly higher rev range.

I believe a Diablo could safely handle 40HP with a sensible and experienced user and a bit of strengthening in the transom and floor to stop them flexing.

If I was going to buy an outboard for my Diablo again I'd probably checkout a 15HP 4 stroke and get the right prop so she'd do about 20 mph, maybe a little better, without that vile and annoying roar of a two stroke motor!

Hugo Tyson, Launceston, Tasmania, Australia.

tysond99 <tysond99@...> wrote:
Hugo,
Do you think your diablo would do all right with only 20hp and two
people or would it bog down too much. Many of the lakes here in
Pennsylvania have a 20hp limit so I thought I might build with that
in mind.
Don--- Inbolger@yahoogroups.com, Hugo Tyson <hhetyson@y...> wrote:
>
>



---------------------------------
Find local movie times and trailers on Yahoo! Movies.


[Non-text portions of this message have been removed]
Hugo,
Do you think your diablo would do all right with only 20hp and two
people or would it bog down too much. Many of the lakes here in
Pennsylvania have a 20hp limit so I thought I might build with that
in mind.
Don--- Inbolger@yahoogroups.com, Hugo Tyson <hhetyson@y...> wrote:
>
>
> Stacey Strickland <staceyjstrickland@y...> wrote:
> "I looked at the 18ft clam skiff, but15ft only has a 4ft beam.
>
> Are you suggesting clam skiff over Diablo"
>
> At speed the Clam skiff would be a lot rougher riding in any sort
of water except smooth or very very small amount of chop. The Diablo
is capable of handling a reasonable amount of chop without extreme
discomfort. My Diablo has a 25HP Mercury 2-stroke and goes extremely
well (about 30 + Mph.)
>
> We found that the bottom used to flex a bit when running flat out
over any sort of chop, so we added a stiffening 'beam' down the
centreline (Like a continuation of the stem and stern knees, if that
gives you any idea!) This totally fixed the Bottom's flexing and
doesn't take up much room or cause any inconvenience. We used
exterior grade ply on the bottom ( Dynel and epoxy sheathed of
course) for economy, but I'd recommend using top quality marine ply
which is far stiffer than cheapo exterior grade ply with fewer plys.
This may reduce or eliminate the flexing problem. Another solution
I've seen done on someone's website was to strip-plank the bottom
from 3/4" Cedar then fibreglass sheath that, creating a lightweight
but extremely rigid bottom.
>
> Hugo Tyson, Launceston, Tasmania, Australia.
>
>
>
>
>
>
>
> ---------------------------------
> Find local movie times and trailers on Yahoo! Movies.
>
>
> [Non-text portions of this message have been removed]
Thanks Hugo.

I wouldn't think that the flexing problem would be as bad in my case,
since I would only have the 9.9hp running at 16-20mph at best.

--- Inbolger@yahoogroups.com, Hugo Tyson <hhetyson@y...> wrote:
>
>
> Stacey Strickland <staceyjstrickland@y...> wrote:
> "I looked at the 18ft clam skiff, but15ft only has a 4ft beam.
>
> Are you suggesting clam skiff over Diablo"
>
> At speed the Clam skiff would be a lot rougher riding in any sort
of water except smooth or very very small amount of chop. The Diablo
is capable of handling a reasonable amount of chop without extreme
discomfort. My Diablo has a 25HP Mercury 2-stroke and goes extremely
well (about 30 + Mph.)
>
> We found that the bottom used to flex a bit when running flat out
over any sort of chop, so we added a stiffening 'beam' down the
centreline (Like a continuation of the stem and stern knees, if that
gives you any idea!) This totally fixed the Bottom's flexing and
doesn't take up much room or cause any inconvenience. We used
exterior grade ply on the bottom ( Dynel and epoxy sheathed of
course) for economy, but I'd recommend using top quality marine ply
which is far stiffer than cheapo exterior grade ply with fewer plys.
This may reduce or eliminate the flexing problem. Another solution
I've seen done on someone's website was to strip-plank the bottom
from 3/4" Cedar then fibreglass sheath that, creating a lightweight
but extremely rigid bottom.
>
> Hugo Tyson, Launceston, Tasmania, Australia.
>
>
>
>
>
>
>
> ---------------------------------
> Find local movie times and trailers on Yahoo! Movies.
>
>
> [Non-text portions of this message have been removed]
Thanks David.

I was planning to get the plans. The dimensions are very hard to read
and a little cryptic in some places. I totally agree with you. The
other boats that I like are the GF14 and GF16 from bateau.com. If I
build per the designer's directions, those boats would be pretty
expensive (gallons and gallons of expoxy resin to built a composite
hull).





--- Inbolger@yahoogroups.com, "dnjost" <djost@m...> wrote:
> I have a Diablo that is now about 15 years old. I use a Johnson
9.9
> 2 cycle motor on it and I can get her on plane with about 250lbs of
> passengers on board. I have tried it with a four stroke and the
> extra weight of the motor on the transom plus the different pitch
> prop prevented the boat from planing. A fifteen is better.
>
> The boat is not unstable, just very light and is subject to
getting
> blown around at slow speeds. It is easy to climb back into after a
> swim as it heels over and lets you roll yourself back in. The kids
> love it. The shape of the hull forces you to sit on the
centerline,
> which help with the stability.
>
> Clam skiff is definately more stable, but will be much slower with
> your motor. You need to decide if speed, or comfort is your goal.
>
> I almost flipped Diablo on one venture when I gunned the motor
> entering a 3 foot chop. Bad idea...(I should know better.) Diablo
> is cheap and easy to build. Get the plans from Payson and don't
> build from the book. You will be glad you spent the $30 bucks.
>
> David Jost
> "Happy Building"
>
> > I bought and read "The New Instant Boats" by Payson, which
> includes
> > the design for the Diablo. I've also visited a couple of
websites
> of
> > Diablo builders.
> >
> > Any thoughts?
Stacey Strickland <staceyjstrickland@...> wrote:
"I looked at the 18ft clam skiff, but15ft only has a 4ft beam.

Are you suggesting clam skiff over Diablo"

At speed the Clam skiff would be a lot rougher riding in any sort of water except smooth or very very small amount of chop. The Diablo is capable of handling a reasonable amount of chop without extreme discomfort. My Diablo has a 25HP Mercury 2-stroke and goes extremely well (about 30 + Mph.)

We found that the bottom used to flex a bit when running flat out over any sort of chop, so we added a stiffening 'beam' down the centreline (Like a continuation of the stem and stern knees, if that gives you any idea!) This totally fixed the Bottom's flexing and doesn't take up much room or cause any inconvenience. We used exterior grade ply on the bottom ( Dynel and epoxy sheathed of course) for economy, but I'd recommend using top quality marine ply which is far stiffer than cheapo exterior grade ply with fewer plys. This may reduce or eliminate the flexing problem. Another solution I've seen done on someone's website was to strip-plank the bottom from 3/4" Cedar then fibreglass sheath that, creating a lightweight but extremely rigid bottom.

Hugo Tyson, Launceston, Tasmania, Australia.







---------------------------------
Find local movie times and trailers on Yahoo! Movies.


[Non-text portions of this message have been removed]
I looked at the 18ft clam skiff, but it looked to be more difficult
to built than Diablo and required much more plywood. I looked at the
15ft work skiff on instantboats.com, but the 15ft only has a 4ft beam.

Are you suggesting clam skiff over Diablo


--- Inbolger@yahoogroups.com, David Ryan <david@c...> wrote:
> Clam Skiff
>
>
> On Saturday, July 24, 2004, at 08:14 PM, Stacey Strickland wrote:
>
> > Hello, does anyone have experience building or using the Diablo? I
> > have a 14ft aluminum jonboat that is only 32" wide at the bottom
> > (Alumacraft model 1432). I'm not statisfied with the stability (I
> > mean lack thereof), an my wife is a little afraid to get in it!
> >
> > I would like something that would still perform with my Suzuki
9.9hp
> > 4-stroke, be more stable, and provide a better confidence and
comfort
> > level in a chop. The boat has to be easy to build and inexpensive.
> >
> > I bought and read "The New Instant Boats" by Payson, which
includes
> > the design for the Diablo. I've also visited a couple of
websites of
> > Diablo builders.
> >
> > Any thoughts?
> >
> >
> >
> >
> > Bolger rules!!!
> > - no cursing, flaming, trolling, spamming, or flogging dead horses
> > - stay on topic, stay on thread, punctuate, no 'Ed, thanks, Fred'
posts
> > - Pls add your comments at the TOP, SIGN your posts, and snip away
> > - Plans: Mr. Philip C. Bolger, P.O. Box 1209, Gloucester, MA,
01930,
> > Fax: (978) 282-1349
> > - Unsubscribe:bolger-unsubscribe@yahoogroups.com
> > - Open discussion:bolger_coffee_lounge-subscribe@yahoogroups.com
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
I have a Diablo that is now about 15 years old. I use a Johnson 9.9
2 cycle motor on it and I can get her on plane with about 250lbs of
passengers on board. I have tried it with a four stroke and the
extra weight of the motor on the transom plus the different pitch
prop prevented the boat from planing. A fifteen is better.

The boat is not unstable, just very light and is subject to getting
blown around at slow speeds. It is easy to climb back into after a
swim as it heels over and lets you roll yourself back in. The kids
love it. The shape of the hull forces you to sit on the centerline,
which help with the stability.

Clam skiff is definately more stable, but will be much slower with
your motor. You need to decide if speed, or comfort is your goal.

I almost flipped Diablo on one venture when I gunned the motor
entering a 3 foot chop. Bad idea...(I should know better.) Diablo
is cheap and easy to build. Get the plans from Payson and don't
build from the book. You will be glad you spent the $30 bucks.

David Jost
"Happy Building"

> I bought and read "The New Instant Boats" by Payson, which
includes
> the design for the Diablo. I've also visited a couple of websites
of
> Diablo builders.
>
> Any thoughts?
Clam Skiff


On Saturday, July 24, 2004, at 08:14 PM, Stacey Strickland wrote:

> Hello, does anyone have experience building or using the Diablo? I
> have a 14ft aluminum jonboat that is only 32" wide at the bottom
> (Alumacraft model 1432). I'm not statisfied with the stability (I
> mean lack thereof), an my wife is a little afraid to get in it!
>
> I would like something that would still perform with my Suzuki 9.9hp
> 4-stroke, be more stable, and provide a better confidence and comfort
> level in a chop. The boat has to be easy to build and inexpensive.
>
> I bought and read "The New Instant Boats" by Payson, which includes
> the design for the Diablo. I've also visited a couple of websites of
> Diablo builders.
>
> Any thoughts?
>
>
>
>
> Bolger rules!!!
> - no cursing, flaming, trolling, spamming, or flogging dead horses
> - stay on topic, stay on thread, punctuate, no 'Ed, thanks, Fred' posts
> - Pls add your comments at the TOP, SIGN your posts, and snip away
> - Plans: Mr. Philip C. Bolger, P.O. Box 1209, Gloucester, MA, 01930,
> Fax: (978) 282-1349
> - Unsubscribe:bolger-unsubscribe@yahoogroups.com
> - Open discussion:bolger_coffee_lounge-subscribe@yahoogroups.com
> Yahoo! Groups Links
>
>
>
>
>
Hello, does anyone have experience building or using the Diablo? I
have a 14ft aluminum jonboat that is only 32" wide at the bottom
(Alumacraft model 1432). I'm not statisfied with the stability (I
mean lack thereof), an my wife is a little afraid to get in it!

I would like something that would still perform with my Suzuki 9.9hp
4-stroke, be more stable, and provide a better confidence and comfort
level in a chop. The boat has to be easy to build and inexpensive.

I bought and read "The New Instant Boats" by Payson, which includes
the design for the Diablo. I've also visited a couple of websites of
Diablo builders.

Any thoughts?