the Wasp

My Feedback: (1)

LOL, funny

seriously tho, most fuels today with Castor have around 4% Castor, is that really enough ?

as a side note, MECOA recommends 50% Castor for their HP 61 and 120, I don't know about their other engines

Jim

Ernie Misner

Thank you for this. What happened to the theory a few years back that the synthetic oils available here to us in the USA were inferior to those in Europe? Is that still the case?

bhady

Any inf on the OS Black Head .60? I have the opportunity to get one almost free, thanks. Engine is marked OS Max -H 60

blw

My Feedback: (3)

Jim- I add castor to my synthetic/castor blend fuel. I hope it's enough.

the Wasp

My Feedback: (1)

I see,, thanks !

Jim

Hobbsy

My Feedback: (102)

Why, I must ask.

the Wasp

My Feedback: (1)

Hi Dave, because to blw Castor's higher flash point is like buying insurance.. I have an old friend from my teens that was good enough of a mechanic to be on Suzuki's MX Team, he told me that there is no better oil for a 2 Stroke than Castor, it simply protects the best, but it has that gumming effect and leaves residue everywhere

Jim

blw

My Feedback: (3)

Jim, 2 strokes are the only kinds of motorcycles I ever owned way back in the 70's. You're right about the heat because those things would very hot. Plus, you have to burn out the carbon every day too or they would run like crap until you did. I had 2 bikes that got holes burned through the piston crowns.

Hobbsy

My Feedback: (102)

I had 2 bikes that got holes burned through the piston crowns.
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Some guys came up with the idea that if you had two sparkplug holes in the head you could run a cold a normal temp plug in one hole and a hot plug in the other hole. If you fouled a plug you could just switch the wire to the hot plug and keep going. More than one guy burned a piston that way. The too hot plug still ran too hot even though the spark plug wire was not attached to it.

I switched my MAICO to Mercury Outboard oil and never fouled another plug, Castrol R would plug it before 50'.

Stoneweapon

In the last years I used only Castor fuel. Synth is also ok, especially for ringed engines. I can handle the special care necessary when using Castor.

the Wasp

My Feedback: (1)

in my dirt bikes "in the mid 70s to early 80s" I would only run Castol R, never a fouled plug, but, there was one shop that sold "Full Bore" 2 stroke oil, I don't know what it was made from but it sure did out perform the Castol R in such a notable way, but once the shop sold the oil they had they never bought more, it was a low end shop that only sold a very low number of Bikes, maybe 10 or 15 (Suzuki)

Jim

Hobbsy

My Feedback: (102)

Jim, Full Bore Racing oil was sold by John Taylor the builder of the Yankee 500 dirt bike. The engine was two OSSA 250 engines bolted together, the final design had the pistons rising and falling together. The first iteration had the pistons rising and falling 180 degrees apart. The first engine was uncannily smooth but had explosive power and would rip the rear tire loose in turns. The 360 degree version was still powerful but forgiving and the rear wheel stayed hooked up much better. The bike never caught on because it, at 384 pounds was on the heavy side. My MAICO by comparison weighed 202.

the Wasp

My Feedback: (1)

Dave, my friend had the Yankee 500, I'm betting he still has it, he has 5 or 6 Honda Q .50, can you believe what they are worth today, about $10 grand each if they are mint

Jim

Hobbsy

My Feedback: (102)

Jim, not only do I have the 1.20E I also have the 1.20 with a pump, I bypassed the factory regulator, (non repairable) and installed an IronBay regulator. I have not run it yet.

the Wasp

My Feedback: (1)

Dave, if the regulator on your engine uses the same Diaphragm as the OS Heli engines, then that Diaphragm will be available soon to buy,, this is the news from the RR Heli forum

Jim

Hobbsy

My Feedback: (102)

Thanks Jim, I did not destroy the pump, I simply bypassed it. Good news.

RC Specialties

Our TH14x1A and TH14x1B TurboHeaders and on sale for Easter this month.

lleach1

My Feedback: (6)

I have one. I am trying to find recommended needle valves settings. Thanks.

Hobbsy

My Feedback: (102)

One?

Which 1.20, Thanks

Hobbsy

My Feedback: (102)

https://www.osengines.com/manuals/

Try this page

hsukaria

I have not posted here in a long time. I purchased an OS 15LA from Hobbsy a couple of years ago and installed it on a Hobby King ministik plane. I must say it is an amazing engine, so easy to use with more power than other 15-size engines that are heavier. Plus the muffler is very quiet. Thanks Dave!

the Wasp

My Feedback: (1)

"Hobbsy"

Dave is a really good guy, he was looking for an engine like the one I had, and even thO my engine needed some work he made me a wonderful deal, to him it was all about fixing the engine, the hobby and friendship, I hope I can return the favor sometime

Jim

Hobbsy

My Feedback: (102)

Thanks H-man and Jim, having fellow GearHeads for friends is one of life's blessings.

lleach1

My Feedback: (6)

I have a early 70s OS H60 Blackhead. I have recently posted a question re initial needle valves settings. I have had no response.
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the Wasp

My Feedback: (1)

I have had no interaction with that engine, the only thing I can tell you is that with all the OS engines I have had, they usually tune around 1&1/2 turns on the high Needle, that is for both Heli and Plane engines, as for my 61FX Plane engine, it's Idle tune's at about 3/4 turn from fully close

I hope that helps

Jim