Evinrude 437cc

Hi group

I built a Ragwing RW-6 and was thinking of using 1972 Evinrude 437cc engine,
rebuilt of course, from a Evinrude TW-30-Q snowmobile. It's a nice looking
twin apposed cylinders But I think might only be 30hp.

Does anyone know anything about this engine, and can the hp be increased
safely.

I also have a polaris 340cc but would like to get closer to 40 hp.also
considering 1/2 VW.

Any help would be appreciated. Thanks Joe




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Clare
That's to bad, it looks and sound like (437cc) the perfect engine. But it
proves looks can be misleading.
Probably to old of a design to increase the hp? What ashamed. Back to the
drawing board (or junk yard) Thanks again Joe

clare at snyder.on.ca wrote in message
...
On Fri, 31 Mar 2006 23:39:26 -0500, "Big Job"
wrote:

Hi group

I built a Ragwing RW-6 and was thinking of using 1972 Evinrude 437cc
engine,
rebuilt of course, from a Evinrude TW-30-Q snowmobile. It's a nice
looking
twin apposed cylinders But I think might only be 30hp.

From what I remember it was rated at 22HP back in 1972 - I remember it
was significantly lower than the 440 Rotax.
I have looked at them before too, with aircraft use in mind. Their CDI
ignition never was reliable enough to leave the ground with though,
and is terribly expensive to replace/repair.

Does anyone know anything about this engine, and can the hp be increased
safely.

I also have a polaris 340cc but would like to get closer to 40 hp.also
considering 1/2 VW.

Any help would be appreciated. Thanks Joe




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On Sun, 2 Apr 2006 08:42:20 -0400, "Big Job"
wrote:

Clare
That's to bad, it looks and sound like (437cc) the perfect engine. But it
proves looks can be misleading.
Probably to old of a design to increase the hp? What ashamed. Back to the
drawing board (or junk yard) Thanks again Joe

clare at snyder.on.ca wrote in message
.. .
On Fri, 31 Mar 2006 23:39:26 -0500, "Big Job"
wrote:

Hi group

I built a Ragwing RW-6 and was thinking of using 1972 Evinrude 437cc
engine,
rebuilt of course, from a Evinrude TW-30-Q snowmobile. It's a nice
looking
twin apposed cylinders But I think might only be 30hp.

From what I remember it was rated at 22HP back in 1972 - I remember it
was significantly lower than the 440 Rotax.
I have looked at them before too, with aircraft use in mind. Their CDI
ignition never was reliable enough to leave the ground with though,
and is terribly expensive to replace/repair.

Does anyone know anything about this engine, and can the hp be increased
safely.

I also have a polaris 340cc but would like to get closer to 40 hp.also
considering 1/2 VW.

Any help would be appreciated. Thanks Joe




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Some of the Polaris 340 engines were closer to 50HP, but at an ungodly
RPM.
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