What a GREAT freebie!!

[AlphaRunner85]

So this past summer we found that our briggs 5hp motor is basically useless and we bummed Then a friend said he had a pressure washer that he didnt use and he said we could have it. Woot! So he showed up last week with a 13hp
honda powered 3500 psi pressure washer. How cool is that?
There is still the task of removing the pump, building a frame , poofing up a torque converter, and a quick rebuild and were ready to go

 

[02mx-5]

Sounds like you lucked out. Do you have any pictures of it? What kind of kart are you going to put it in?

 

[AlphaRunner85]

no pics yet.. maybe tomorrow. as for the kart we are gonna have to build a frame probably gonna have to build a frame cuz our old frame is child size and no roll bars. considering the hp difference they are really necessary of us..... we like to push it big time

 

[motor_head]

might have a tapered shaft if so hope you can fab up a way to mount a clutch

 

[lemegacool]

might have a tapered shaft if so hope you can fab up a way to mount a clutch

or you'll have to get the crank machined to 3/4... there is a couple of 13hp+ 3/4 clutches availables that are cheaper than 1" clutches

 

[anderkart]

Cool GX390 score, my buddy just picked up a sweet running Honda GX340 (11hp) pressure washer engine for $60. He lucked out and got a non-tapered 1" shaft on his.

 

[AlphaRunner85]

Well after throwing the whole tool box, a can of wd-40, and a can of dep penetrating silicon spray we finally got the pump off(bending 2 pry bars in the progress). it is a non-tapered 1" shaft. need all new gaskets and a rebuild but its in good shape. sorry no pics yet, forgot the camera. how much can the head be milled with stock internals?

 

[AlphaRunner85]

now if only i could poof up a welder...

 

[Rickracer]

... how much can the head be milled with stock internals?

I cut about .060 to .075 off my GX240 head, did some very mild porting, and advanced the flywheel a few degrees, it went from fairly fast to wicked fast just like that.

 

[AlphaRunner85]

and advanced the flywheel a few degrees

Flywheel or timing? and it looks like we will be putting the new motor on our old frame for um..... "testing purposes."
whats the concensus on the best torque converter for 13hp and up, more on the up side.

 

[Rickracer]

Same thing, the magnet is on the flywheel, and the coil is stationary, except for air gap adjustment, so advancing the flywheel advances the timing.

 

[AlphaRunner85]

oh ok i was thinkin valve timing not ignition timing =p.

 

[oscaryu1]

I cut about .060 to .075 off my GX240 head, did some very mild porting, and advanced the flywheel a few degrees, it went from fairly fast to wicked fast just like that.

Too much. On a Briggs 5HP .030 is about as much you want to go before flow is affected. 'Course you can do more, you'd get better low end obviously, but less top end (or lose top end).

Same thing with stuffing cases on a 2 stroke.

 

[Rickracer]

A 13 horse Honda is a MUCH different animal than a Briggs flattie,
I could have/would have gone more, but nobody makes a billet rod or flywheel for that motor, so 6000 is about all I wanted to turn it,

 

[AlphaRunner85]

did you consider getting one custom milled.
it would cost a fortune probably buy the results
would be wild!

 

[Rickracer]

That would have cost money. I cut my head on a belt sander**, for free!!!! Then I lapped it on a piece of glass with progressively finer grit sandpaper to get it baby bottom smooth.

**I am a highly trained and experienced professional technician. Don't try this at home kiddies, cylinder heads and/or belt sanders may be seriously injured or killed in the process,

 

[Compnerd88]

Thats the first Ive heard of decking a head with a belt sander.....I do however like the Idea of lapping it on a piece of glass.


I'm a CNC Machinist so I work at a precision metal shop, so im gonna put mine on the surface grinder. Will be flat within .0002 of an inch

-Logan

 

[AlphaRunner85]

The MONSTER RUNS!!!!!!!!!

 

[1992suburban]

surface grind aluminum?

hmmm.. guess its been a while since I ground something

 

[anderkart]

Hey, great score on a cool motor there Alpha...