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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.

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...

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...

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...

Are these engines any match for a Mac 45? Does the OS 46 like to run with less nitro? Just shopping around and would like to hear some opinions.

I have a data logger system and would like to know if there is an ideal exhaust gas temp measured at the pipe coupler area (say 20mm from the header flange) on the Mac 84 and other Mac engines if the info is available. Does this temp remain a constant whether the air temp is warm or cold. For...

I was thinking of using my compressor intake and an old gas tank for a reservoir to vac bag my tub mold. Is this sufficient? I'm getting a gauge tomorrow to measure the pressure. I'm using carbon woven roven cloth. Was told that u can't vac below 1 Bar. Is this true?

Hi Brett, Nice to see you finally joined the forum. What happened to your other CMB 1.00?

If you had a gear drive unit fitted to any of the good marine hydro engines what would be the most efficient? Small prop with lots of pitch and cup and geared up for mega revs at the prop or a bigger prop with less revs (reduction gearing)?

Would like to know how he's doing with his datalogger.

Looking for peoples views. Male/Female compression molds are supposed to lighter and stronger, but I'm thinking I would have to taper the sides of the tub ever so slightly to stop the carbon weave from shifting and also to compress the sides. I don't want to have to make a 3 piece female mold...

Has anyone ever made a starter mechanism that makes contact with a gear that is either bolted to the flywheel or a flywheel with a gear machined into it. I find it a pain in the but starting 84's and bigger. Thought it would be good to have something that pushed into dowl holes so you didn't...

I get spam for that stuff in my email box. What's it do?

What are the guys here in OZ paying for nitro methane per litre or for 4 litres and what prices for methanol?

Would it be better to run less weight in the rear of the tub and have the prop push harder with less lift, or would it be better for the rear to be heavy and use the weight at the rear so the prop has something to keep it in the water as the blades attempt to lift the back out of the water at...

Reading the sponson foam thread, why do you guys use kicker? What is it? Can I just epoxy the ply to the foam without it? For the guys in OZ, what is a similar foam as what Kerry and Andy Brown use that I can buy here? I think I will build my own boats now that I know how to attach the sponson...

Does anyone know if there is a 4 channel pistol grip radio on the market or is it easy to get one added on by an expert in the field?