CMB 21 fuel recomendations

[penfold]

What nitro percent should I be running on gear drive CMB21 engine, being used on a 35 inch long surface drive mono hull.

 

[ALLAN YUEN]

If you go serious race so use 60% if you just run fun or test and use 40% to 50%

 

[Duck899]

35% is fine.....lol

 

[seaducerpete]

I run nothing but 70 in my 21s

 

[Terry Keeley]

60% for me in everything-that goes roundy-roundy that is...

 

[misshydro]

60% for me in everything-that goes roundy-roundy that is...

50% is perfict plus I run 50% in all my boats so I dont need to buy different nitro for different boats,=cost more money.

 

[moparbarn]

i run wildcat 65% nitro/18% oil in my cmb .21's. both greenhead LS & goldhead TT, they seem very happy with it, but so do my k&b .21 ob's. the smaller the engine, the higher the nitro they seem to like, imho.

 

[julianconde]

65% and 18% oil Technology Hobbies fuel thats what i run on all my 21 engines and you will be on the money my friend..

julian

 

[robertpickard]

60% is all you need still gives you a needle to play with out on the water i use John Otto fuel only way to go

 

[curtis canton]

I run 60% in my stock Cmb .21 w/ Seaducer hull and I have ran the motor for one and a half seasons without a problem. The boat even took the district 3 championship with that combo.

 

[Hydro Junkie]

For the first few runs I use 30% heli fuel and after that 50% boating fuel. I've got two different brands right now so..........................

 

[Andy Wood]

I use 65% in my B Hydro only. Everything else is 50%

 

[RodneyPierce]

90%. Come on guys, why skimp On a serious note, I run 45%. I think next year (depending on how much fuel we have left) I will step it up to 60%.

 

[tmunn]

50% wildcat works very well for me ..

 

[LarryConrad]

I generally run 60% in everything up to my .45's. The difference in performance of a .21 engine running 50% and 60% is astronomical. If you have only run your engines on 50% or less you have no idea what you're missing out on in terms of performance. The jump from 60% to 70% is like wise, but you sacrifice ease of operation because the needle settings are much more sensitive...But those little engines sure do sing pretty at full song on 70.