Dis should get sum of yall's wheels turnin.

http://www.recpower.com/f308.htm

And only weighs a little over a hundred pounds.


I know what I want for Christmas!

I could hit 40+ wit dat.

Wonder if they hold up.

2 stroke pain in the ass is all im gonna say... but EFI makes it a little easier... fighting multiple carbs is a pain in the ass to get the all in sync

Also I dont have 10,000+ to spend on a motor... or did I?

fuel consumption is what kills ya though...

Guys, I know a guy by my house that has one just like this! He has it on a 11 foot airboat thats swings a 78 inch prop, this little boat is bad ass! We put 4 guys in it and ran ground all over his yard. I cont beleive that this thing can run like that. The guy got about 800+ hrs on it and he ant had a NO trouble, its a very depenable motor.
He can turn the motor at 7500 rpm, the guy did some reseach on this motor before he got it and he was telling me he thinks it put out 330 horses at the prop running max 8000. Hoyt @ GT know about this boat.
The only thing is a 2 stroke and it sounds like a bee running in the swamp........lol

I bet they cost a little more than a briggs. Some of you moneybags need to make a mm with this so we can be all inspired and sht.

Here is the actual engine manuf. page...

http://www.hirth-engines.de/english/index.htm

nice little set up... 4cyl at 63.6 cu in...

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

Not very much torque.

i see... but not at 4500rpm... on a 5500rpm motor

its all about the curve....

not sure how the modded motors torque curve looks... but i sure wish someone i know would send me one so i can extrapolate...

you would need a 50 gallon tank to make a long run!!!!

also used in light aircraft great motor in that applaction

there are several options in that line of engine. anyone of the rotax, cyuna, and all the snowmobile engines. these will make a great airboat power unit. most have all ready been proven in the ultra lite and experamental aircraft. a ready made gear reduction or a redrive from j-bird are available. as for torque, remember torque is multiplied by the reduction. say it makes 50 lbs at the crank @ sat 6000 rpm. it would make 100 lbs at 3000 +or- with parisidic loss.

most of the MM guys care about break HP and TQ... most only run a 1.15:1 or 1.25:1 reduction... which aint much TQ multiplication like us airboaters have...

i am curious what my Generac will put out in TQ max and at 4600rpm... anyone have a guess...

Bricia Are you saying your gonna get more hp out of the modded generac than the modded BS!! I have seen both modded and drove both the generac dont have shit on the side of the bs!! I dont beleive that you can even come close to getting 70 hp out of the generac!! Just my .02!!

DDM.... we shall see... that is all I can say right now... you ain't gotta clue what was done to this engine as far as mods...

if you are refering to Generac that PD used a while back... a lot has changed with them since then... totally different carbs... which i am going mikuni any way... totally different set of ignition coils... my internals have been completely redone... only item still stock is the crankshaft...

but all I can say is I will see how it goes since it is still being built...

but in my opinion yes I will have more HP out of a Generac and more TQ out of a Generac than what a modded Briggs....

oh and yea I will get it at lower compression and lower RPMs...

which mike ya talking about?

I also hinted to the amount of "cu in" in one or my post above... that should tell ya how big it is...

my Briggs was pushing 70 so I think this motor will easily get up there... I am feeling 70+ at the minimum...