Hot Start with the Continental Continuous Flow fuel injection system
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- เผยแพร่เมื่อ 11 ม.ค. 2023
- In this episode of the ABS Hangar, Tom explains the Hot Start procedure for engines with the Continental Continuous Flow fuel injection system.
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Love this idea so my bonanza buddy had me try it in my SR22 T/N. Ended up with a giant puddle of gas underneath the cowling. Thankfully, we hopped out and looked before we tried to actually start it. We were able to push it to a different part of the ramp and then do a flooded start.
One of the best explanations of the Hot Start procedure yet! Thanks!
Glad it was helpful! - Lauren
Thank you! currently flying a 206 with a io 520 continental and I was getting so frustrated with the second half of my day having to hot start after a fuel stop doing aerial survey! This helped ALOT!!!!
That's great! Glad it's been helpful!
This is what I do in my Debonair and it works well. IO470K on mostly mogas.
This is a dam good video
I've owned and flown four Bonanza's, 35, 33, and 36, for forty years and heard all sorts of hot start recommendations over the years. NONE worked as well as THIS method. Like Tom Turner suggests,I always timed a full 60 seconds of the aux pump step.
Does opening the cowling after shutdown help keeping things cool so you're less likely to have hot start issues?
In the procedure at step 1 he doesn't mention throttle position; just mixture. I assume throttle is also in idle cut-off?
The position of the throttle during the fuel circulation step of the POH Hot Start procedure is irrelevant as no fuel is getting beyond the mixture cutoff. After turning off the auxiliary fuel pump the checklist calls for priming the engine, which includes moving the throttle fully forward for priming before retarding it for start. Personally I go ahead and put the throttle fully forward at the beginning of the Hot Start procedure but it makes no difference in that part of the procedure. - Tom Turner, ABS Air Safety Foundation
We just had a customer come in for an annual with his immaculate A36. After we did run ups he was going to depart and I wanted to film his start and post it but after a few failed attempts to get the engine going and probably over heating his aux fuel pump motor I stopped him and showed him my technique and it started in five seconds.
What should the throttle position be during the hot start when running the fuel pump? Or doesn't it matter since the Mixture is off?
Correct. Since the throttle input into fuel injection is downstream of the mixture control, no fuel gets to the throttle input during the fuel circulation step of the POH Hot Start procedure. Therefore, as you said, throttle position at this stage of the procedure is irrelevant. - Tom
I would like to see the hot start procedure for the (E series engine)
I don’t remember ever having a hot start problem with a E series
Does this work with a TSIO-360?
I (Tom Turner) don’t have any experience with the Continental TSIO-360 series as it is not used on any Beech airplanes. Like models I’m familiar with, it varies by engine type. If your engine employs the Continental Continuous Flow fuel injection system then yes, it works the same.
If you don’t know the type of fuel injection system your engine has there are some clues:
1. If the Start checklist calls for starting with the mixture control in the idle cutoff position and advancing the mixture when the engine fires, it does not have the Continental system.
2. If the Takeoff checklist calls for the auxiliary boost pump to be ON, your engine does not have the Continental system.
I have had many mechanics who have told me to do just the opposite - flood the engine. Then do the flooded engine start. It has worked every time for each mechanic who has shown me that, and yet after 20 years I still don’t use that method. Thoughts?
Hi Joseph,
Thanks for the question! Put 20 Beech pilots in a room and ask how they start their engine when it's hot, and you'll get maybe 22 possible techniques. Most will work most of the time, including intentionally flossing the engine. The hazard with that technique is fuel pooling in the exhaust manifold and igniting explosively. The ABS Technical Advisors and I have heard (and they have seen) of exhausts and mufflers cracking. If it leads to a true backfire Continental recommends an engine tear down inspection.
The procedure in the Beech POHs and Continental Owners Manual works consistently, in my experience, and avoids the hazards preset in some other techniques. For that reason it is our preferred method for hot starts in these engines. -Tom Turner
@@AmericanBonanzaSociety thanks Tom. Appreciate the answer. It’s funny that so many mechanics instinctively flood the engine. I’ve had this plane over 20 years and it still annoys me that sometimes it just takes the engine sitting and cooling down before it will start. It’s always been hot or miss. More hits than misses but misses are a real pain. Much appreciate your response. Joe
I have an A36 with an IO550B, I do a normal prime, then keep pushing the throttle forward while starting, when it catches I pull the throttle back to 900 RPM, I might hit the fuel pump to low fir a few seconds if it seems rough, always starts within 5-15 seconds. Cirrus guys can’t understand how fast it hit starts, I have shown this technique to many Bonanza and Baron pilots who now never fear a hot start. I have to add a caveat, my plane is a 1975 with vernier controls, with “stick” throttles (newer bonanzas and barons) go to full throttle and slowly pull the throttle back until the engine catches, 3-7 seconds the engine will start! John C A&P IA
@@johncronley1278 That is exactly what I have been doing for my A36 with the IO550, and when I had my 35 with the E85 engine
Thank you for the explanation.
On my Mooney Ovation, Continental IO-560, I use this procedure:
𝐂𝐨𝐥𝐝 𝐬𝐭𝐚𝐫𝐭: Boost pump on; prop-mixture full forward; manifold open half-inch; hi-boost 5”; start engine
𝐇𝐨𝐭 𝐬𝐭𝐚𝐫𝐭, even after a taxi to fuel pump: prop full forward; manifold-mixture full closed; boost pump 5” (7” in summer); manifold full power minus half -inch; start engine and enrich mixture to full within 1” when engine fires.
𝐇𝐨𝐭 𝐬𝐭𝐚𝐫𝐭 in summer after a flight: same as above but boost pump between 14” up to 30”.
Love this idea so my bonanza buddy had me try it in my SR22 T/N. Ended up with a giant puddle of gas underneath the cowling. Thankfully, we hopped out and looked before we tried to actually start it. We were able to push it to a different part of the ramp and then do a flooded start.