Inboard Gas Engine ?
 

I have only had smaller boats with outboards and would like to get a larger boat.
The ones in my price range have engine issues and here is my question.
I understand the preference for diesel over gas but I have never heard
of anyone simply replacing an inboard with a normal engine such as from a
go-kart or Volkswagon or one of those 3 cylinder japanese cars.
I don't see the advantage of a marine engine since when they get wet they are
filled with rust and seized as would my 6hp go-kart engine.

So, does anyone know why I can't replace an engine with a normal gas engine?

Thanks,
Frank

Inboard Gas Engine ?
 

Sure you can, but it may require lots of effort to get it to fit and you
need to be concerned with the proper gearing for the prop, etc. If you've
got a lot of time and not much money, it will be a good learning experience.
:-)

--
"j" ganz @@
www.sailnow.com

"woopei" wrote in message
...
I have only had smaller boats with outboards and would like to get a larger
boat.
The ones in my price range have engine issues and here is my question.
I understand the preference for diesel over gas but I have never heard
of anyone simply replacing an inboard with a normal engine such as from a
go-kart or Volkswagon or one of those 3 cylinder japanese cars.
I don't see the advantage of a marine engine since when they get wet they
are
filled with rust and seized as would my 6hp go-kart engine.

So, does anyone know why I can't replace an engine with a normal gas
engine?

Thanks,
Frank

Inboard Gas Engine ?
 

but I have never heard of anyone simply replacing an inboard with a
normal engine such as from a
go-kart or Volkswagon

Why that complicated? I'd like to know why manufactures haven't
switched to installing B&S or Kohler lawn tractor engines in boats.
Just think when it blows up it could be replaced for $400-$600 instead
of the $6,000 that Yanmar wants. A 2cyl lawn tractor engine has as
much HP as a Yanmar. What's the problem?

Inboard Gas Engine ?
 

You can even use the blade instead of the prop...

--
"j" ganz @@
www.sailnow.com

"Ringmaster" wrote in message
oups.com...
but I have never heard of anyone simply replacing an inboard with a
normal engine such as from a
go-kart or Volkswagon

Why that complicated? I'd like to know why manufactures haven't
switched to installing B&S or Kohler lawn tractor engines in boats.
Just think when it blows up it could be replaced for $400-$600 instead
of the $6,000 that Yanmar wants. A 2cyl lawn tractor engine has as
much HP as a Yanmar. What's the problem?

Inboard Gas Engine ?
 

"woopei" wrote in message
...
I have only had smaller boats with outboards and would like to get a larger
boat.
The ones in my price range have engine issues and here is my question.
I understand the preference for diesel over gas but I have never heard
of anyone simply replacing an inboard with a normal engine such as from a
go-kart or Volkswagon or one of those 3 cylinder japanese cars.
I don't see the advantage of a marine engine since when they get wet they
are
filled with rust and seized as would my 6hp go-kart engine.

So, does anyone know why I can't replace an engine with a normal gas
engine?

You can, of course, but you'll certainly not help the value or salability of
your boat at resale time. Then there's the issue of cooling--your kart
engine example is most likely an air-cooled engine. How do you propose to
cool that engine in an enclosed space near the waterline? Same with a VW
engine, unless you're referring to one of the later liquid cooled engines,
in which case you'll have to adapt some sort of heat exchanger and
water-cooled exhaust manifold, assuming you'll be running in the brine.
Finding such parts for non-marine engines will be costly, if you can find
them at all. Ultimately you'd be wise to consider replacing the engine with
a proper marine engine, perhaps even a used Atomic Four gasoline engine if
cost is a factor. There is a reason why engines to be used in boats are
*marinized.*

Max

Inboard Gas Engine ?
 

woopei wrote:
I have only had smaller boats with outboards and would like to get a larger boat.
The ones in my price range have engine issues and here is my question.
I understand the preference for diesel over gas but I have never heard
of anyone simply replacing an inboard with a normal engine such as from a
go-kart or Volkswagon or one of those 3 cylinder japanese cars.
I don't see the advantage of a marine engine since when they get wet they are
filled with rust and seized as would my 6hp go-kart engine.

So, does anyone know why I can't replace an engine with a normal gas engine?

Thanks,
Frank

Becasue it's not water cooled...there are gas engines on sailboats that
aren't water cooled but anyone I knew that ahd one ahd massive problems
with them...

Inboard Gas Engine ?
 

Ringmaster wrote:
but I have never heard of anyone simply replacing an inboard with a
normal engine such as from a
go-kart or Volkswagon

Why that complicated? I'd like to know why manufactures haven't
switched to installing B&S or Kohler lawn tractor engines in boats.
Just think when it blows up it could be replaced for $400-$600 instead
of the $6,000 that Yanmar wants. A 2cyl lawn tractor engine has as
much HP as a Yanmar. What's the problem?

I just saw an add dor a marin e diesel made from a Kubota tractor
enfine...I think ti was in the new Carolina sailing magazine...

Inboard Gas Engine ?
 

but I have never heard of anyone simply replacing an inboard with a
normal engine such as from a
go-kart or Volkswagon

Ringmaster wrote:
Why that complicated? I'd like to know why manufactures haven't
switched to installing B&S or Kohler lawn tractor engines in boats.

Probably because they can't get marine safety approval.

Just think when it blows up it could be replaced for $400-$600 instead
of the $6,000 that Yanmar wants.

And it could blow up your whole boat with it.


It would be possible to stick a lawn mower engine in a boat,
but it would have to be in a vapor tight enclosure which
would make it a PITA. Efficiency would be terrible.

A 2cyl lawn tractor engine has as
much HP as a Yanmar. What's the problem?


Torque & RPM mismatch. A propellor in the water wants to
turn slow with lots of grunt. Jetskis sole this problem by
convertin hi RPMs and low torque into a pressurized column
of water, which is released as velocity.... energy into the
water equals boat moving forward. Works well for a
lightweight high speed craft.

Two big problems for marine installations are fuel vapor,
which is what blows up so many gas powered inboard boats,
and cooling. Scandinavian boats have (or used to have) air
cooling and it worked great two ways, nice warm cabin and
efficient engine cooling. But in a warmer climate, the cabin
will become a sweatbox and the engine will run too hot.

If you had a small cheap engine that could be water cooled
and had fuel injection, I'd say that would be a good
candidate for dropping into a boat. Be prepared for a LOT of
work though; and do youor homework! Unless you've got the
right prop & tranny combination, the end result will not
propel the boat well enough to feel worth the labor.

DSK

Inboard Gas Engine ?
 

My Catalina came with a 'Universal Atomic diesel' of 28 hp which is a fully
marinised Kubota engine. Most marine engines now are based on industrial
engines as purpose built marine units would not generate sufficient quantity
of orders to achieve a reasonable selling price.

"katy" wrote in message
...
Ringmaster wrote:
but I have never heard of anyone simply replacing an inboard with a
normal engine such as from a
go-kart or Volkswagon

Why that complicated? I'd like to know why manufactures haven't
switched to installing B&S or Kohler lawn tractor engines in boats.
Just think when it blows up it could be replaced for $400-$600 instead
of the $6,000 that Yanmar wants. A 2cyl lawn tractor engine has as
much HP as a Yanmar. What's the problem?

I just saw an add dor a marin e diesel made from a Kubota tractor
enfine...I think ti was in the new Carolina sailing magazine...

Inboard Gas Engine ?
 

In the Far East it is common to see open boats with a transom mounted
Volkswagen car engine with the propeller on the end of a shaft coupled
straight to the crankshaft and going down at an angle into the water. No
gearbox, no outboard leg. You steer by swivelling the whole outfit.. They
achieve quite high speeds.

OzOne wrote in message.
...

A friend bought an outboard with a damaged leg and effectively
converted it to an inboard.


Oz1...of the 3 twins.

I welcome you to crackerbox palace,
We've been expecting you.