Gas engine ?

[l8rg8r]

I'm building a large mono hull with a gas engine. On the motor mount what will happen if i don't use rubber isolators and mount the engine with solid mounts right on the stringers

[don ferrette]

I'm building a large mono hull with a gas engine. On the motor mount what will happen if i don't use rubber isolators and mount the engine with solid mounts right on the stringers

The boat will vibrate itself to death, rubber isolators are a MUST on larger IC engines. Also a solid mount on a large boat hull will create a tremendous amount of hull noise, monos are the worst in that regard because of the inside shape actually magnifies the sound.

[l8rg8r]

Ok thanks Hess I need to find some isolators

[don ferrette]

Ok thanks Hess I need to find some isolators

Here ya go-

http://www.gizmomotors.com/index.php/online-store/engine-mounts/rubber-isolators-gmm21-detail

Bruce is a good guy to deal with and very reasonable prices.

[gsbuickman]

Come on Bro, show the guys some pics of that Prather mono your macgyvering on . you gotta love the 80's pastel pinstripe paint job ...

[l8rg8r]

image.jpgimage.jpgimage.jpgimage.jpg here's a few pics of my 42 inch mono I believe it's a Prather but not sure what it is other than cool if you know make or model I would love to here it

[gsbuickman]

Here's some pics of the 80's pastel twins i took when you brought them over Bro :-) . they're so Miami Vice ....

[gsbuickman]

Hopefully Rick will show us some pics of his motor project that he's working on for the mono. I forget what motor he said it was, but I know its a watercooled 5 HP weedeater style motor, with a lightened , balanced flywheel.

As far as the shovel goes. It's hand built glass over wood and not something I want to run very often, so i'll keep it vintage simple. I am thinking of a 700 class Cordite with a 60v/50A Astroflight 207D on 4s pushing the 3/16 flex & Octura 1460 prop. Its primarily a shelf queen, so its all good. I wanna see what Rick cooks up to make he mono go ..... :-) .

[Chilli]

The boat will vibrate itself to death, rubber isolators are a MUST on larger IC engines. Also a solid mount on a large boat hull will create a tremendous amount of hull noise, monos are the worst in that regard because of the inside shape actually magnifies the sound.

Also, every screw that isnt Locktited will vibrate loose. On gas boats you have to keep an eye on loosening hardware even with rubber isolators.

[l8rg8r]

image.jpgimage.jpg
Here is a pic of what I've got done so far I milled the jug to except my redneck water jacket and lightened the flywheel I goofed on what engine I had it's not the 044 it's a stihl fs or fc 44 that's a big diif so hp I have no clue but it's 30cc I wish it was the 044 that's a 70cc with over 5 hp thanks for the lock tite tip I lock tite everything alway it's cheap insurance