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i`m getting alot of air leaking around the header flange to adapter to exhaust stub. how critical is this? searched, found nothing. if it needs to be sealed, what are you guys useing? tnx. CARTER

anyone delt with "quick tech hobbies ? they show engines & parts for sale. website is "quicktechhobbies.com/engines". can`t believe i found a k&b goldmine. CARTER

what temp. are you guys running to get the mac to "wake up"? tnx. CARTER

when setting the c/g, is the tank full, 1/2, or empty. is there a standard everyone goes by?. CARTER

looking for o.d. of k&b sleeve, 7.5, model # 8701. tnx. carter

a dog truely is mans best friend. if you don`t beleave it, try this experiment. put your wife and your dog in the trunk of your car for an hour. when you open the trunk, who is really happy to see you ?

need sizes on k&b carbs. # 80-8721 & # 80-8701. checked k&b sight, no luck. tnx. CARTER

looking at the octura prop chart, i see different series of props have different multipliers. 400=1.4 600=1.6 etc. what is this multiplyer based on. tnx. CARTER

has anyone done a comparison (m.p.h.) on a engine w/water cooling, vs. no water both at ideal needle settings? CARTER

am building a ts2. airtronics receiver & th. servo. steering servo is t. hobbies hi torque # ts64. st. servo hums, causing th. servo to twitch. disc. st. servo, th. servo quits twitching. t. hobb. said hi torque servoes do this sometimes. tried other new one away from th. servo, same thing. th.&...

which state is htb boats located? also has anyone heard of golden circle marine? CARTER

just compared prices. mac @ phils hobby shop 234.99. cmb @hobby supplies (aust.) 384.75. (converted). cmb better eng? or ???????? CARTER

need some help. are the exhaust bolt patterns the same on a mac21 p.h. & a cmb 21 p.h.? CARTER

have 32" racing tunnel w/ stock 7.5 k&b. (8701). bought used app. 15 yrs. ago. came w/ p235. looking for better prop choices. i`m sure prop design has come a long way since then. tnx. CARTER

hey guys. need websight for andy brown/ the prop wall. tnx. CARTER

what`s the best head clear for k&b 7.5 (8701) 60% nitro? tnx. CARTER

why do you wait till after break in to pull the shim ? i understand the c/r goes up along w/ heat. do you want the engine "soft" during break in ? going back together w/ mine. just curious. CARTER

we`re in the metallic years. silver in our hair , gold in our mouth , & lead in our a-- !!!!!!!!!!!.

broke in w/ 60% , no water restriction , 2.5 turns out on h.s. needle per inst. very rich. running cold. after 6 tanks , started to lean it out. ran great at 1.5 turns out. still too cold. soldered hole in outlet nipple & drilled it out to .060. still hold head after 5 wot laps. disconnected...

is it normal for fuel to leak where the muffler halves bolt together on the o.s. o.b? tried some silicone, still leaks. just learn to live w/ it? CARTER