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Tom used to have a fantastic video gallery but must have dropped it when the site was rebuilt I guess because of cost. A links page would be a great way to get to the videos, which are often very hard to find.

Yeh it has the blue head CMD 84 parabolic pipe and have to measure the header but at the time when I built the boat I set up the header and pipe to butt up against each other at the join. Once I knew a bit more about setting up boats I realized that I should have cut more off the pipe and left...

Almost new Mac .84 and pipe. Had 6 litres of fuel running since brand new. US$300 or AUS$400 plus freight cost. I'm in Melbourne Australia. Ph 0421323703.

Yeh sure am.

Thanks Don. I remember when u put these things into production. I was really after something that metered the fuel better into the carb at part open throttle but thanks anyway. The OS 9B carb seems like a good option.

With a Single 84 you will see 55mph, maybe 60 if set up perfectly. This is a kind of a heavy hull, but a good hull. Ive set up a few for gas engines. Sorry to say, even with twins you wont be seeing 85mph. A great set of engines in there you might see 70, maybe. The fastest twin Cat Ive...

What sort of speed can I expect from a Stryker 43" hydro with a Mac 84? Can this boat handle twin 84's? I'm looking for about 120KMPH which is probably about 85MPH.

What sort of speeds can I expect from the 43" Stryker hydro with a Mac 84 on 55%? What's the difference to the 44.5" Stryker 2. It says it can handle any power. Could it handle twin 84's?

Does the Power Surge Products mixture valve work on Mac style carbs? It doesn't look to have a needle or is this because it doesn't need one. I have just totalled my Hummingbird and the purple plastic mixture valve broke in the crash, I think it is the Bob Violet type. I never liked it because...

a rigger hey .. take the turn fin off and run over the top !!! my 21's run over the weed mat, on the river , very cool looking doing it to... go down there with a tinny and a big bag of salt ...... jason Salt? Am I missing something or does this kill the weeds?

LOL, that's way funny because that's what I'd like to do but I don't have a gasser only an .84 rigger. It's not heaps of weeds just enough to make u think my riggers running a bit strange and then stop to find out u just become a tow vehicle. I might give it a go in the next couple of days.

I've got a reasonable size pond 5 minutes away from my home but it has long weedy looking things growing in it. One part I wouldn't even think about running in but the other part of the pond has only random bits. Is this a "NO GO" pond or is it just something u have to be careful with, like...

Thanks mate. In my superkart racing days the bridge in the port was to help keep the ring from poping out (something nitro guys don't have to deal with) being able to widen the port as much as possible but maybe the effect was 2 fold.

How is this so with an exhaust port?

Does anyone know how that guy went with the real good looking ducted-fan hydro he was thinking about building? I remember AB gave him some good advice about basic setup.

Lightweight Hummingbird outrigger with all Speedmaster hardware, Mac .84 engine and pipe, proped and only had 6 litres of fuel put through the engine. Comes with cowling and plug for Vac forming new cowls. Ready to race less radio. AU$800 or swap for Brand new CMB .45RS + $200 and buyer pays for...

Wow AB, sounds like you've built one before. Would be a great test bed for someone wanting to put a jet engine in an R/C boat some day. Who knows maybe this will be the beginning of the end for prop drive!

Jim, How did all those combinations work out for Ron Walker and Ron Brownshidle?

Hey guys, would like to know how it runs in a boat. I used to race superkarts (80cc) and a mate of mine had a 250cc twin cylinder and they fire 180 degrees apart to get revs, but I can tell you that when I raced sidecars one guy set up the 4 cylinders like a single. He said lots of torque but...

It just seems that the HP figures stated on the website are a fair way off every other engine manufacturers. I know it's mostly rubbish but almost half the horsepower seems a little strange.