Gerard, who imports the Moki engines, also is the importer for Bisson. MUFFLERS: My choice for either Super Tigre or Moki engines is the Bisson muffler from Canada. The top gets tweaked a quarter turn or so on very humid days, especially early mornings on foggy days with low clouds. I don't recall ever changing the low end adjustment. I haven't run one on a 3000, but the one on my 3250 is excellent and there is no reason to buy a replacement carb. It was used on the last 3000's and the new 3250. After the Moki started becoming popular, Super Tigre designed a new, much larger carb. This one didn't work very well at all, and many people had trouble running the engine. Later on, Super Tigre designed a new, larger diameter carb. I currently have ASP carbs on all of my 3000's. 90/1.08 became popular even though it didn't have in-flight mix since it was cheaper than the OS carb. This feature is popular on scale planes with tightly cowled engines. Next, the 7D could also be fitted with an in-flight mixture control. First, it had a larger diameter throat and would give more power. 90/1.08 would fit and it had two advantages. Many people found the OS 7D carb from the OS. 60, so it had a fairly small diameter throat. The fuels are around 14%-16% oil, about like 4-stroke fuel for oil content.ĬARBS: The original carb on the Super Tigre engines worked very well. As displacement goes up, the volume increases proportionally faster than does the area, so the need for oil percentage becomes less. The parts to be lubricated by the oil are areas which are square function. If you were wondering why you need less oil in the big engines, the fuel/oil mixture a volume which is a cubic function. The Moki runs better on regular fuel than the Tigres. High oil, regular fuel does not idle as well as the low oil fuel. You need to run a lower nitro fuel or add a couple of head shims. In hot weather if your engine "crackles" you probably have detonation-not good. You won't get you any more power, and it will cause the engine to run hot and detonate. Anything greater then 10% nitro is a waste of money. These are high compression European engines, originally design for FAI, no nitro fuel. Both are formulated for big glow engines like the Tigre and Moki.
After 2 gallons, you can switch to a low oil, big engine fuel such as Morgan Fuels' Omega Super-T or FHS Red Max ST3000 fuel, 10% nitro. If you don't plan to remove the tubing from the carb to refuel, you can zip-tie the large tubing to the carb nipple.īreak your big engine in on regular 10% model fuel for 2 gallons, running slightly rich. Use a short length, about 1 inch, of medium tubing to attach to carb and splice it to the large fuel line. Super Tigre engines have a small fuel nipple on the carb. If you use a DuBru filler valve, use the large one
Use large fuel tubing from tank to engine. Take your tank so you get one small enough to go through the opening in the tank.ĭrill out the holes for the fuel feed line in the two plastic caps and replace the brass tubing and the fuel line inside the tank with large size tubing, 5/32 instead of 1/8. A lawn mower shop or hardware store will have these.
Use a Sullivan or DuBro fuel tank, or some kind with replaceable brass feed linesĭrill out clunk or replace it with chain saw or brush cutter type filter clunk. The engine will lean out in maneuvers and have an inconsistent and sensitive needle valve settings when using medium fuel line.
Using medium fuel tubing on a big engine is like sucking a thick shake through a small straw. Large fuel line, large brass tubing and a large hole in the fuel pick up clunk. 46 uses medium tubing, so it is reasonable to expect the large engines will require the large stuff. 46 to a Moki 1.8.įUEL LINES: The little Cox uses small fuel tubing and the OS. There are some differences, right? Same for moving from an OS. You will have to do a few things differently than you did with a. The big engines are easy to operate after you know how. You also may have heard they are hard to run and require a lot of special care and feeding. If this is your first big glow engine, and by that I mean a Super Tigre 2300, 2500, 3000 or 3250, or a Moki 1.35, 1.8 or 2.1 you might find it intimidating to operate. Starting & Running Big Super Tigre and Moki Engines