What Carb for WB Rookie 500 Engine?

Don Carlson · Post by **Don Carlson** » Sat May 05, 2012 11:29 pm

Can anyone tell me what carb came on a WB Rookie 500 and/or what carb(s) will fit and are calibrated so that they work correctly? And does anyone know where I can get (a copy of) a manual and part list? Thanks in advance! Don

Terry Armstrong · Post by **Terry Armstrong** » Mon May 07, 2012 10:59 pm

Don,

That's a great little engine! We used one for my son's kart the last 4 years with NO problems. Just put fuel in it and GO. Still using the same spark plug we started with 4 years ago!!

The carburetor is a Tillotson H810BX. Tiny carburetor with maybe a 5/8"Venturi and 3/4" throat. Looks a lot like a small Walbro. I'll try to attach a couple pictures here, but if it doesn't work send me an e-mail address.

Don Carlson · Post by **Don Carlson** » Tue May 08, 2012 10:09 pm

Hi Terry,

Thanks for the reply and info! It looks like this engine doesn't use a reed block, is that correct? I wish I could find a parts book. I don't know what all they used this engine for but mine is a model 50052 and has a strange end on the PTO with a couple sets of threads. This crank doesn't look like anything I've seen a clutch bolt to. I'm pretty sure I can turn down the large set of threads to match the journal which has a .500" diameter.....assuming I can get a clutch with a .500 ID. The crank will have to be keyed and I'll probably have to make a special nut to hold the clutch on. If I can find some parts sources, I consider replacing this crank with a kart crank. I could also use a recoil starter and what ever bolts to the flywheel. I really don't want to put a ton of money into the engine but I would like to get it where I could put it on one of my karts. I know it wouldn't be period correct but if I could find a matching engine, it looks like 2 would fit nicely on my '61 Dart Roadrunner and be just enough power for my 11 and 13 year olds.

Any other words of advice are greatly appreciated!

Rob Voska · Post by **Rob Voska** » Wed May 09, 2012 7:50 am

Instead of turning the threads off why not make up a sleeve for a 5/8" straight clutch. Put a external keyway in & if the threads are the right direction where it tightens instead of losens I don't see any problem.

Pick up a small engine handbook like this. It has most everything in it. Everyone should own one.

http://www.ebay.com/itm/Intertec-1973-S ... 27c656ca72

Terry Armstrong · Post by **Terry Armstrong** » Wed May 09, 2012 10:42 pm

Don,

That engine was rated at 4.25 horsepower @ 7000 rpm according to the literature I have. They made several variations of the engine (chainsaw, kart, ring saw) with different carburetor locations and also PTO configurations. I can send you the literature if you send me an e-mail address.

There is a small 4-petal reed block under the carburetor, you can see the base of it in the pictures I posted.

My engine PTO looked similar to yours except it didn't have the threads closest to the block like your's.
Mine actually had a left hand thread at the end. I had Jim Donovan at Max-Torque make a clutch special to fit the crank, no key was needed because of the left hand thread. I was able to buy a 2 piece mount and also a Reed box muffler from Vince Hughes to fit the engine. He also supplied the West Bend decals.

You occasionally see these little engines on E-Bay and they don't go for a lot of money.

If I can answer any more questions, let me know!

Terry

Rob Voska · Post by **Rob Voska** » Thu May 10, 2012 6:37 am

Is it possible to remove the 90 deg intake & bolt carb right on top of reed cage?

What Carb for WB Rookie 500 Engine?

What Carb for WB Rookie 500 Engine?

Re: What Carb for WB Rookie 500 Engine?

Re: What Carb for WB Rookie 500 Engine?

Re: What Carb for WB Rookie 500 Engine?

Re: What Carb for WB Rookie 500 Engine?

Re: What Carb for WB Rookie 500 Engine?