Recent content by Mark O'Malley

Thankyou! That is a silicone hose from Amazon haha

Finally got the opportunity to design and machine a watercooled head for the engine. We'll see how it runs with the water cooled head.

One issue with carbon in an exhaust application like that is that the carbon doesn't retain heat very well and a hot expansion chamber will.make more horsepower in the upper rpms the hotter it gets. A cooler exhaust will make better low end torque at the expense of rpms and horsepower up top and...

I have an unknown brand mono hull with a nitro engine in it. Originally had a novarossi .21 engine that had mo compression when I acquired the boat. I got ahold of a brand new Losi Mach 427 engine out of a 1/8 scale buggy. Being a car engine, it it air cooled. I'm looking to make a water cooled...

I ride standup jetskis and in "freestyle" built jetskis that do flatwater backflips, and other aerial tricks, there are carbon expansion chambers being used. They do have water injected into them to keep the temps down but also, they do not run wide open for more than a few seconds at a time...

I don't even know where to find that high if nitro content fuel. I know the guy I got the engine from runs 30% in his buggy with the same engine. I also understand a boat loads the engine much different. Are you recommending 65% with air cooled head?

What nitro content fuel would you recommend with air cooled setup?

Its the mono hull I have. Engine is a losi mach 427 out of a buggy. The top of the boat is open and gets plenty of air flow. I wrapped some 1/8 od aluminum tube around thr first few fins just to have something. Currently I'm running 25% nitro with around 12% caster. It's a mix of 30% nitro with...

Very cool! I'm actually looking to do.the opposite, make a water cooled head for my losi engine in my boat. Just curious, why change from watercooled to air cooled on a boat?

It's been a blast so far! Handles great and stays planted in the water. Definitely capable of more speed with some tuning. Which is why I'm here! Here's a little video of the maiden. Another buddy has a black jack 55 and another one has a few electric boats.thos was with the omega 15% fuel and...

Thankyou for the recommendation! Do you have those 2 props available? Also, are those 3 blade props? Any reason for the 3 blade over the 2? I am running vp fuel currently. It's a 50/50 mix of pro race 30% nitro, 9% caster and masher basher 20% nitro with 15% caster oil. The very first time I...

Thankyou sir! It's been an interesting project for sure! I'm still unsure about the carb tuning and prop selection. It's a 32 inch mono hull. The engine is a .27 I believe. Power output is around 3hp. What kind of temps should I see on the head at the glow plug after a decent run? After a hard...

Was at a friend's neighbors house about 2 years ago and he was randomly showing us his rc car collection. Sitting on top of a bookshelf opposite side of the room sat this really cool looking vintage rc nitro boat, had a big pipe on it as well. Being a 2 stroke guy already, the tuned pipe really...

I was at a friend's neighbors house one afternoon and he starts showing us his rc car fleet. Sitting in the opposite corner of the room on top of a bookshelf was this sweet looking nitro boat. Had a tuned pipe which I noticed first. Worked out a deal and got the boat for 60 bucks. Had a...

Hello everyone, I'm Mark, been in rc world for the last 2 years. Mainly in rc airplanes. I do have a boat I actually got first that has been a total project. Anyway, finally got it water ready. I'll post some pics in the boat registry.