Converting a Kohler 440-2AX to a Mikuni Carb in a Hustler

[micmac]

I'm in the process of building up my new Hustler. I would like to convert it from the old Walbro carb to a Mikuni.

1. The original carburetor is a walbro. It utilized several spacers to connect the intake manifold to the carb. When I use the Mikuni flange should I use the spacers as well? Is there any reason for the spacers other than moving the carb further out from the engine?






2. Does anyone have a lead on a company that makes a throttle cable that would connect to the Mikuni carb that would be long enough for a Hustler. Any companies that make custom cables would also be helpful.

3. Also I'm considering a Dual carb setup. I'm unsure on what I would use for intake flanges to mount the carbs to. Would this be something available or would it require something to be fabricated? I know that the mid 70's mercury trail twister snowmobile used dual carbs with this engine. Any ideas would be helpful.

Thanks in advance

Mike

[techfx]

R.I. or Richard's Relics may be able to help with the cable.

[ES-hustler]

Throttle cables

micmac,

Many people use motorcycle and snowmobile engines in ultralights. Below is a link to a place that should have anything you would need. I ordered a cable for my hustler/mikuni set up a few weeks ago.

Throttle Cables and Splitters for HKS and Rotax Ultralight Aircraft Engines

[George]

Thanks ES.

This will be a great resource for a few of us.

[micmac]

Thanks ES that is exactly what I was looking for . Hows your Hustler comung along?

Mike

[ES-hustler]

Well I've been slowly gathering parts for the engine and trans. I ended up getting a mikuni vm36 off ebay for the kohler k440-2ams and I just ordered an exhaust system from growth products yesterday. Just to clear things up growth products manufactured the kohler two strokes once kohler quit with them. I have everything I need for the engine minus a fuel pump. Any ideas on the rate I need for the pump?

For your intake questions, you might want to check with growth products or Sudco. Both have websites, sudco's is pretty good.

[micmac]

ES,

What kind of exhaust system did they have for the Kohler. Was it a tuned exhaust? I have the exhaust manifold I just need from there back.

here are the links in case anyone wants them

Growth Products, Inc.

SUDCO Motorcycle Parts Distributing

[ES-hustler]

They had a complete system only for my motor, no manifold, but yes I'm pretty sure it was tuned for it. I will have to modify it for the hustler I think based on how it was described. I can post a pic when I get it if that would be helpful?

[micmac]

Yeah a picture would be great.

Mike

[evil8x8]

In this picture you can see what I think is the throttle cable on Hydromike's 503. It looks like he connected a short cable to the original cable with a piece of metal mounted on the transmission.

http://www.6x6world.com/gallery/showphoto.php/photo/127/ppuser/7/sl/h

[ES-hustler]

Exhaust is here

Yeah a picture would be great.

Mike

Mike,

I got the exhaust today from GP, but I ordered an "F" type manifold and they sent me a "Y" manifold I'll be calling tom. to figure that out..hope this helps

[micmac]

Thanks Mike that helps a lot

[kgrant]

What carb did you end up using? I have a VM 34 for my K440-2AM and am trying to find some base specs of what to use in it for jetting/needles ect. I have been searching the vintage snogo sites and haven't found any solid specs of what to use, help!!

[Bradleyj]

I just put a Mikuni VM carb and fuel pump in my Hustler 440. It starts up and runs great, but there is fuel spewing out of the float bowl overflow port. I removed the bowl and confirmed that the float lever was set properly and that the float needle and seat were clean. When I thought more about this, it makes sense since these carbs are usually used in gravity feed applications (like in motorcycles) where the fuel tank is higher than the carb. I think the fuel pump is over-pressurizing the fuel. How are people doing these conversions dealing with this? I'm thinking of installing a tee on the fuel line right before the carb inlet port and running a return line from there back to the tank.