Nearly there...sort of

diegowhite · Faceplant Joined: 23 Oct 2008 Posts: 36 City: Dublin

Got the new 9HP engine yesterday, it's a BEAST, and twice the size of the 6.5HP.
In order to get the TAV on now we're going to have to grind down some of it and also grind some down of the engine base. Are there negatives to this like making the base suseptible to cracking?
You can see where need to cut in the green

JeffKnox · Posted: Feb 12, 2009 9:36 am Post subject:

grind away.... i grinded the shizzle out of both of mine

Montgomery · Backside 180 Joined: 26 Feb 2008 Posts: 976 City: Rogers

diegowhite · Faceplant Joined: 23 Oct 2008 Posts: 36 City: Dublin

Thanks, guys, grinded that bitch down and she's totally flush now.

I put the TAV on the engine but the belt aint gripping at all, like as if the shaft aint long enough

Not having the manual doesn't help:(

JeffKnox · Posted: Feb 12, 2009 8:44 pm Post subject:

video?

diegowhite · Faceplant Joined: 23 Oct 2008 Posts: 36 City: Dublin

I don't have the engine running, was just moving it by hand.

I think I'm either going to have to float the TAV to get it in line or try to extend the shaft on the other side, any issues with floating it? the manual said not to Sad

paulmc · Posted: Feb 13, 2009 8:16 am Post subject:

Looks like your shaft is poking out too far from the engine for the TAV.

With the TAV there is usually a metal collete that spaces the plate from the mounting, try without that collete as i looks like yours does not need the spacing. then put everything back as it was before.

http://www.hoffcocomet.com/comet/pdf/162608A-tav2-30-new.pdf

the spacer/collete i'm talking about is item 11 on the parts list. Also see instruction #4 in the manual.

by the way hope you find the instructions useful.

ugly · Ollie Joined: 23 Jun 2008 Posts: 57

I think you have the rear piece on this photo on backwards. I think it should have the flanged end facing the engine. Also, that bigger key lookin washer thing should fit inside one of those things...the belt doesnt rest on it. The belt will be slack until you power up the rev's and the TAV engages. I could be wrong though...i installed mine in like 2 mins and didnt really take note of how i did it.

Here's the instructions if you can make anything out. I'm really not all that familiar so maybe this will help. The first page is on the bottom...then scroll up for the second page.

diegowhite · Faceplant Joined: 23 Oct 2008 Posts: 36 City: Dublin

JeffKnox · Posted: Feb 13, 2009 11:51 am Post subject:

JB_CANSKATE · Posted: Feb 13, 2009 12:35 pm Post subject:

I would try putting some washers in between the engine and the TAV mount until the belt is straight. See if that works.

I had to grind down the collete/spacer to make my tav fit on the briggs.

diegowhite · Faceplant Joined: 23 Oct 2008 Posts: 36 City: Dublin

Right gonna order up the go kart axle tonight, whats the best way to mount the spool on it and with the chain running straight from the TAV what size sprocket should i have on the axle?

paulmc · Posted: Feb 19, 2009 8:27 am Post subject:

What does your spool look like? is it a releasing spool?

You want a sproket with about 60-70 teeth on it.

diegowhite · Faceplant Joined: 23 Oct 2008 Posts: 36 City: Dublin

were building it ourself out of cutting discs and rods

paulmc · Posted: Feb 19, 2009 12:00 pm Post subject:

you want some axel hubs that will hold onto the cutting disc's aswell as hold onto the axel

GnarShredd · Backside 180 Joined: 24 Jan 2009 Posts: 1529 City: Seattle

diegowhite, I keep hearing about a magic 1:6 ratio. (Example, 12 teeth on the TAV, 72 on the sprocket; or 10 on the TAV 60tooth sprocket). Then you can more finely adjust it with spool diameter.

this is pretty much just from my research and a friend who built one that works perfectly. I'm about 3/4 of the way done with mine. (Just need to figure out an engine mount and order an axel).

diegowhite · Faceplant Joined: 23 Oct 2008 Posts: 36 City: Dublin

paulmc · Posted: Mar 02, 2009 9:12 am Post subject:

Usually they use grubb screws to hold onto the axel, hence an axle with a 1/4" key way is always a good idea.

like these kind of things....
http://www.bmikarts.com/shop/?shop=1&cat=172

diegowhite · Faceplant Joined: 23 Oct 2008 Posts: 36 City: Dublin

we got hubs but it has no grub screw holes only a keyway with keystock, do we drill holes into the hub. so bloody close to having it running and so many little things to get around Smile

ILwake12 · Faceplant Joined: 06 Mar 2008 Posts: 21 City: Milliken

just a word of caution about the cutting disk spool idea, make sure you use some kind of wheel rim on the inside of the spool or the bolts will pull straight through the cutting disk (voice of experience, very frustrating)