Engine and Tranny into a boat?
rei...@comcast.net
267 (v8) and tranny. The boat is pretty rough and has a 165hp
mercruiser. I'm wondering for the pain in the ass of getting it
running with water under it and so-on maybe I could just put the prop
onto the drive-shaft of the 267 and figure a mount. the only issues I
can think of are the seal arround the shaft, and the ratio. Anyone know
a mercruiser's ratio? How bout the ratio of a 267 V8 to the drive-shaf
for the 80 camaro? I figure the tranny would be really cool for
choosing fast or pulling a skier.
Thanks,
Elliott
Larry
Then stomp the gas pedal (make sure you install that also) and away you go!
Way cool dude!
PS Make sure you go out alone. I would not any innocent folks to die due to
your stupidity.
(¯`·._.· £ãrrÿ ·._.·´¯)
<rei...@comcast.net> wrote in message news:3F232841...@comcast.net...
nooneimportant
optimal RPM for turning a prop, but if you turn it too fast, no matter how
much torque is turning it, you will get cavitation (pressure on parts of
blades gets low enough that the water basically boils, and since air is not
very effecient on makeing thrust on a water prop you loose efficiency, and
it can cause nasty vibration). Other problem is cooling, most marine
inboards are water cooled, and guess where most of them get that water from?
The lake/ocean. Some do have closed loop collant systems with a radiator,
but imagine drawing lakewater into an automotive engine, then sending that
lakewater to a heat exchanger of some sort for your tranny fluid and oil.
Or you can stick to the closed loop radiator system and then try and find a
way to get good airflow across the radiator, and its attatched fluid cooling
accessories. Personally i would find it easier, safer, and more efficient
to stick to a marine motor on boats, and an automotive motor for cars.
People run into all kinds of problems on even the simple conversion of an
auto engine to homebuilt aircraft, and i can imagine it would be equally
difficult to do it for a boat(if not more so).
<rei...@comcast.net> wrote in message news:3F232841...@comcast.net...
Bret Chase
harder on an engine than drag racing. unless that 267 has a 4 bolt main, I
wouldn't even bother. you have many more issues than sealing around the
shaft.... for that you use a "stuffing box" that you can buy at a "real"
boatyard (i.e. the ones that actually build boats). your main issue is
cooling... most marine engines draw straight out of the water, not what your
engine is set up for. on a related note, you need water cooled exhaust
manifolds, a proper transmission (I've seen powerglides used in 20'
inboards) and a cam setup for marine use. remember boats don't use
overdrive and you'll be at sustained high RPM's with a high load.
you'd be much better off fixing the mercruiser, IMHO. and remember, if you
do get this thing cobbled together, the coast guard doesn't play when it
comes to safety.
-Bret
<rei...@comcast.net> wrote in message news:3F232841...@comcast.net...
rei...@comcast.net
Seems others are fearful of cooling... Well a radiator works on a car in
traffic - and I'm sure it would work on a boat too.
I was thinking I could mount it behind the boat with an electric fan (like
hot-rods use). Once I get the bugs out I may turn this $500 boat into a $20K
boat and one that runs reliably. I would think that the 3 speeds of a real
transmission would be a big advantage. I also think I can use the power
steering pump and break master-cyllendar for trimming/steering/etc. The best
part is the great performance with dirt-cheep parts. Still it's tempting just
to get the ol mercruiser running - maybe I should put that into the camaro
(haha).
Elliott
Pudpuller
This is a joke right?
Terry French
copper line looped under and outside the hull.
as far as the rpm you need to watch it because you can over rev the engine
due as others have stated prop de-capitavation.
besure you install a flame arrester on the carb and make the motor box so
that you get plenty of air flow it will help with the heat exchange and to
keep unwanted fumes from building up.
you can install a wet exhaust if you put some form of pressure release on it
otherwise it will suck up water as soon as you kill the engine. otherwise
runn it out the stern and give it hell.
David Tarantino
are different than a car engine. They are sealed better so any spark/arcing
of electric will not cause a possible fire or explosion if any gas fumes are
present in the bilge area.
ScottH
#1 - boats don't have radiators. They have water pumps that pull lake water
in, run it through the engine, and back to the lake. If you look at the
foot of a I/O system you'll see vents in the front, that's incoming, and it
discharges through the prop.
#2 - boats don't have transmissions. The closest thing they have to one is
changing out props. You should be able to take off the transmission and
connect the prop to the crankshaft. Besides, if you did that you'd about
have a mid engine boat, which also doesn't happen because it throws the
balance off.
You need to get some help, or you'll be salvaging a boat.
<rei...@comcast.net> wrote in message news:3F233757...@comcast.net...
sidewinder
you are going to run a radiator be sure to have a keel coller of a sort.
#2 Ok whoever said boats don't have transmissions has lost thier minds.
Yes they are not the type of tranny that you would be used to in a car or
truck. But there is a transmission on most every marine motor. And yes
there even is one on a outboard. They are called lower units. In the case
of what he has he can use the mercruiser outdrive as his tranny.
"ScottH" <now...@noplace.edu> wrote in message
news:bg26b2$3gl$1...@slb2.atl.mindspring.net...
Capt. Frank Hopkins
My Bravo II has a 2.0 ratio on a 22 x 22 prop @ 4000 rpm = 2000 prop
turns. I think if you run a light crankshaft as is in the automotive
engine you will;
A. Never get the prop turns right.
B. Burn out the main bearings due to overload.
C. Have an engine and trans that overheats all the time.
D. Waste a car load of money on the shaft engineering.
E. Probably blow yourself and any passengers to kingdom come, because
auto parts do not meet USCG marine safety requirements.
Please! for your own safety, become conversant with United States Coast
Guard Marine Safety requirements and SAE standards for: Starters,
Carburetors, Flame Arrestors, Alternators, Fuel Pumps and Ignition Systems.
http://www.uscgaux.org/~0701408/
Capt. Frank
WasteNotWantNot
>
>
>
>
> rei...@comcast.net wrote:
>
> > Just got a 21' 73 sportcraft boat. Have a recked an 80 camaro w/ a good
> > 267 (v8) and tranny. The boat is pretty rough and has a 165hp
> > mercruiser. I'm wondering for the pain in the ass of getting it
> > running with water under it and so-on maybe I could just put the prop
> > onto the drive-shaft of the 267 and figure a mount. the only issues I
> > can think of are the seal arround the shaft, and the ratio. Anyone know
> > a mercruiser's ratio? How bout the ratio of a 267 V8 to the drive-shaf
> > for the 80 camaro? I figure the tranny would be really cool for
> > choosing fast or pulling a skier.
> > Thanks,
> > Elliott
> >
I suggest contacting those Cubans that almost made it to the USA
recently in a 53'Chevy truck. Do what they did and it would save lots
of time as you could leave the driveline in the Camaro. Just hook the
prop to the driveshaft the way the Cubans did and strap barrels to the
side. It will be much safer and you will have two boats. The US Coast
Guard had to sink the Cuban vessel and it was not that easy.
rei...@comcast.net
them. That way I could just change the wheels and drive on in. On the front I
could either run a chain to spin them from the rear or use them to stear. Now
that I think on it more heck I've alwayse dreamed obout building a car-boater
thing. That is drive up to the water (maybe pulling it on a trailor) put the
boat in the water and drive onto it. strap on and use the car's wheels to drive
a wheel rigged onto a prop. Could use a car-differential in reverse tied to a
prop. That way even reverse would work, And whatever the gearing a
chain-sprocket mechanism could adapt it. hmmm why arent these things for
sale??? Hasent such a thing been done? Just saw the wheel-drive-on cyllendars
used at the motor-vehicle-immisions testing system. Seemed they worked pretty
well.
KJ
when they had what looked like a 350 on a little 'asian' canoe-type-thing. I
would review Junkyard Wars episodes for ideas. Or I would put a nice engine
on a 21 and put the camaro engine in a 10' flat bottom and make the ppl at
the watering hole fear your wrath.
"in all seriousness" I always thought an engine and a tranny in a boat would
be cool, but a 21' is a big boat. Get a big bass boat or something that is
cheap/common and make a sleeper.
<rei...@comcast.net> wrote in message news:3F85FD8E...@comcast.net...
Fred Williams
"Monster Garage"! :-)
<rei...@comcast.net> wrote in message news:3F85FD8E...@comcast.net...
> I like that idea!... I could weld barrels onto the axils and put paddles
on
> them. That way I could just change the wheels and drive on in. On the
front I
> could either run a chain to spin them from the rear or use them to stear.
Now
> that I think on it more heck I've alwayse dreamed obout building a
car-boater
> thing. That is drive up to the water (maybe pulling it on a trailor) put
the
> boat in the water and drive onto it. strap on and use the car's wheels to
drive
> a wheel rigged onto a prop. Could use a car-differential in reverse tied
to a
> prop. That way even reverse would work, And whatever the gearing a
> chain-sprocket mechanism could adapt it. hmmm why arent these things for
> sale??? Hasent such a thing been done? Just saw the wheel-drive-on
cyllendars
> used at the motor-vehicle-immisions testing system. Seemed they worked
pretty
> well.
...
Marsh Monster
I like Monster Garage.
marsh monster
~grrrrrr~
~~~~~
~~~~~
nsf.wi...@verizon.net (Fred Williams)
writes....
Man! Get a life! You been watching way too much "Junkyard Wars" and
"Monster Garage"!
:-)
///////////////////////
Eightupman
cried......and was throwing munchies at the TV.
Junkyard Wars is good too, but I liked the British version, "Scrapheap"
better. Bowser started on the champion team in the first season...now he is
a staple on the show.
"Marsh Monster" <MarshGrassPro...@webtv.net> wrote in message
news:3361-3F8...@storefull-2318.public.lawson.webtv.net...
Scribb Abell
<inline...upside down>
.
yeppers.....the British version is the gooder one....
those Brits are a funny lot....
Jesse's good too....
I've heard some folks trash Jesse's show....
but mannnn.....they can show build sum sheet
in jest a matter of days.....
scrib
~~
~~
eight...@newemail.com (Eightupman)
Me too!! Except the one when Jessie destroyed a cherry 1969 El Camino
SS. I cried......and was throwing munchies at the TV. Junkyard Wars is
good too, but I liked the British version, "Scrapheap" better. Bowser
started on the champion team in the first season...now he is a staple on
the show.
~~~~~
~~~~~
<MarshGrassPro...@webtv.net> wrote in message
.
KJ
the world.
Monty Python
Need I say more?
"Scribb Abell" <Scrib...@webtv.net> wrote in message
news:14848-3F...@storefull-2314.public.lawson.webtv.net...
Terry Spragg
steering". I saw it done on a built up fishing scow. One brake
pedal for each wheel. No rudder, I think. Not with floating
barrel wheels, or drive on, it was just a side paddle wheeler
using a car differential. It made a lovely duck blind, with full
heat.
The chevvy engine might not like half a ton of thrust pushing on
the end of the crankshaft. Nor will the tranny tailshaft. A
thrust bearing is required, or a side paddle wheel rig. A
stuffing box would surround the prop shaft with a packing gland
compressed between the inboard end fitting nuts.
--
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SofDevCo
rgko...@ipxbcugs.net
rei...@comcast.net
bolt on truck-rack now (home built w/ my torch). My bro's drivin it
from MD to ElPaso and keepin it. Thus the ol 250 mercruiser (165HP)
will have to function again (any links for 250 chevy engines?). I
suspect it may be siezed. Maybe time to buy an old truck and work the
parts into the mercruiser. Maybe some PB-Blaster into the spark plug
holes could save it. The idiot I bought it from drained out the oil so
it's been dry for over a year and is missing some of the fuel-line
pieces. He also said "the starter grinds but it turned" - I'm not sure
I believe the turned part. Pray for me and pray for bro taking the
Camaro home to die!
Elliott
terry
into a boat you will need to work out some form of thrust bearing on the
propshaft. A small block slant 6 or v6 might be the best options. Besure
to put a fire resistor on the carb.
As far as the merc. throw in some mystery oil LOTS OF IT and let it soak
out for a little while then fill with oil. Put plenty of mystery oil in the
cylinders to insure that the rings are free. The old timers used mystery
oil and or BRAKE FLUID for years but i'm not certian how well the main oil
seals would take to the break fluid, they should handle it. But again,
while you have it out it might be a good bet to replace the front and rear
oil seals anyway. Keeps the gunk out of the bilge.
Tiffany/Steve
Someone gave me a boat with a locked up Mercruiser. It was a 4 cylinder
Iron Duke and an Alpha One outdrive. The motor oil was drained (or leaked
out) and the boat sat for about 5 years uncovered.
The transom was completely shot, and the floor was beginning to turn into
topsoil.
I did have some fun freeing the motor - I removed all of the plugs and
filled the cylinders with transmission fluid.. and let it sit.
When it finally broke free, you should have seen the trans fluid fly out
of those spark plug holes. I'd say a couple of cylinders propelled the
trans fluid 15-20' into the air.
Make sure to crank it with the plugs out...:-)
I gave the boat away to someone who just wanted the trailer. It was just
too far gone. We ended up picking up an 86 Sunbird 175, same motor and
outdrive combination.. awesome boat. This summer we ended up with a
new 22' pontoon (2004 Sweetwater) + 90hp Johnson 2 stroke outboard.
It's almost as fast as the Sunbird (30mph) but drives like a bus.
Now that all of the kinks are worked out of the new boat it's time to put
it up for the winter. Go figure - the Sunbird hasn't had any significant
issues since we bought it over 2 years ago .. and the new boat broke every
time we went out - little things like VRO pumps and engine control
computer (called "SLOW"). New stuff is garbage.
-Steve