Just finished my newest build .... Blazer backlash hydro

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14 years 11 months ago - 14 years 11 months ago #17844 by Scott

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tapkoote wrote: Fine job Scott
How about a run down on that motor, what carb is that?
Is that red line for starting?
Pat


Happy to share engine tech ..

Engine an RCMK S254 EVO, fully modified with all the tricks. ( Stock stroke & bore )
Water cap a Decortin smooth top sand blasted and painted.
Intake manifold the thin M&D with a WT-771 carb, intake bell a RCMK part.
Red tube a direct primer off the carbs purge circuit, 1-2 pull starts every time once you know how hard to pump the bulb once fuel is discharging.
Zenoah EZ start fitted, Zip-Kits Super collet for drive.
Gizmo mounts and throttle linkage.
Pipe & header a custom internal stinger by Don Shanks
Muffler one of my own creations ( Sub 85 DBa at WOT )

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2 stroke Engine Tech of 30+ years, Prop tweeker, Chronic tinkerholic, Home of Motor Heads RC Racing Engines ...
8 time NAMBA National 6 lap heat racing record holder.
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14 years 10 months ago #17960 by Simpros1
backlash looks great!!! I'm building one myself with the newer kit and was confused on something. I was wondering if you could pm me for a few questions?

Thanks, John

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14 years 10 months ago #17963 by Scott

Simpros1 wrote: backlash looks great!!! I'm building one myself with the newer kit and was confused on something. I was wondering if you could pm me for a few questions?

Thanks, John


Public board .... just ask here ?

2 stroke Engine Tech of 30+ years, Prop tweeker, Chronic tinkerholic, Home of Motor Heads RC Racing Engines ...
8 time NAMBA National 6 lap heat racing record holder.

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14 years 10 months ago - 14 years 10 months ago #17964 by
I agree Scott.

Q & A in a public board is a benefit for all of us.
Simpros: remember that there is no such thing as stupid questions. Only stupid answers.
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14 years 9 months ago #18245 by larryosbourne
Hi scott i got to ask how does the wt-771 carb work with your engine? Is the line in the primer blub a return line on the 771? I have a new 27cc sikk and was trying to find out how to run one fuel line from the IV Bag?

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14 years 9 months ago #18246 by Scott
The discharge port of the purge primer circuit can be:
*Blocked off with a plug such as an antenna cap ?
*Be connected back to tank, tho bad idea IMO with bags because air will be pumped while fuel is getting in and out. Hard tanks not a problem.
*Be used as way to direct prime engine as shown above.

As to the 771 carb in general, Find them far superior to the 257 if running mod engines at 18K+ rpm levels. Personally REALLY LIKE the 771 carb.



larryosbourne wrote: Hi scott i got to ask how does the wt-771 carb work with your engine? Is the line in the primer blub a return line on the 771? I have a new 27cc sikk and was trying to find out how to run one fuel line from the IV Bag?


2 stroke Engine Tech of 30+ years, Prop tweeker, Chronic tinkerholic, Home of Motor Heads RC Racing Engines ...
8 time NAMBA National 6 lap heat racing record holder.

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