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So has anyone found that adding a certain type of oil to commercial fuels can extend bearing life? I see torco has 14% synthetic and 2% castor for a total of 16%. So there is some room to add another 2-4% of additional oil to maybe improve or change its properties. I have always added an oz of...

Over here in the northwest we run at sea level in 60 degree weather then the next week we go over the mountains and run at 1500 feet in 95 degree weather. I want to see if I can improve the fuel draw through the spraybar in the hot weather and thin air. All the info says to run leaner in the hot...

I turned one out on the lathe today with a larger diameter spraybar so I could drill it out to .098". The original spraybar is .137" diameter so I made one that measures .152". That's the largest I could go without drilling out the carb body. Hope to test it out soon if the weather gets better...

Bringing up an old thread I have measured the hole in my spraybars on my CMB 67's black carbs with red spraybar and it looks like they are .080" . Does anyone know how far I can drill these out before I need to worry about the spray bar breaking off from engine vibration? The current...

I measured the depth of the marks in my rotors and most are around .001". One Idea I was thinking of was to machine a pocket into the rotor around the pin hole and install a thrust washer for the bearings to wear on then I could easily change it out. Who knows what other problems could arise...

Yes I run square drive in 1/8 scale hydroplane. I do change the bearings a couple times a season even when they seem ok but it always seems to run better after. After years of not really getting into the technical stuff on these engines I thought I would spend some more time learning about them...

I find it interesting that there is no way to control this part of the engine. The drum sort of just floats free to move fwd and aft in the engine. With two gaskets it sets the end play around .023" so I guess that must be CMB's intent on the setup. I was hoping to find a way to address the wear...

Can anybody tell me the correct drum rotor end play fro a CMB67? I have found some old info about this but nothing definitive. I have 4 motors I'm going through and one has .015" and the others are at .023". I haven't measured one without the gasket so I don't know what the minimum would be...

I've been running the R324BS on my 3pv with no problems. It has two antennas. They say not to use analog servos with it and they are correct. I had a little throttle servo act up when I just plugged the new receiver into the radio box without really checking the servo. Brent

Tried my hand at making a zero degree water cooled header last week. It was looking good till I realized I miss calculated the cooling holes. They were just too close to the inside diameter of the header. Several hours and setup (and of course my amature mistakes) make these not cost effective...

I agree. I could use a couple more of these. Now I'm moving the ones I have from boat to boat. Brent

Did you rig that handle and button? Looks like a great improvement over that one that comes on these starters. I already have one or I would get yours. Brent

Here's what I set up last year using the 20v batteries from my power drill. It works pretty good but not as well as a lipo. Starts my 67's without any trouble. It's a adapter for a power wheels kids electric car. $12 on ebay

Mike, What carb is on that green head, the black or the silver one?

I've been searching for some more of them everywhere. All my boats have them but I need more for new builds . My last boat I was short one of the spring receptacles so I made one from the smallest binder clip I could find. Works but not pretty Brent

I agree with Allen. The double ace .67 speed pipe is very good. Very similar to the muck is shape and performance. http://double-aceracingproducts.com/catalog/product_info.php?cPath=3&products_id=170 Brent

Thanks for the information Grim. I'm going to nurse my Fasst system out one more summer. I've never had any trouble with it but it is old. I guess it will work till it doesn't (Argh!) Brent

So I need to update my radio system for my fleet. I'm looking at the 4PM but I see its backordered on a lot of sites and out of stock at Futaba. The reason I'm changing is due to the lack of receiver availability for my old fasst system (that is working fine by the way). I want to avoid getting...

The headstock, seatpost and bottom bracket all have steel tubes I cut from a Lemon bike I used for all the hardware. There is also some glass cloth involved in the headstock area along with finger joints in the wood. The frame was built in two halves and disassembled then hollowed out with a...

Nice guitars Rich. Nice guitars Rich. I have built a few as well. I found that boat building skills are very similar to guitar building. Here's another off the wall project I built. It's a bicycle made from walnut, ash and wenge. A little heavy but rides great. Brent