"You Have To Cart Mogas Around Like A Homeless Person" Ask The A&Ps podcast

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"You have to cart mogas around like a homeless person"

20h ago 1:03:11

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A Cirrus with fluctuating fuel flow, de-injecting an engine, and fear of overhaul are on tap for this episode. Email [email protected] for a chance to get on the show.

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Full notes below:

Joe has a Maule with a 540 engine in it. The company has a mod to turn the engine to a carbureted version and he’s wondering about the legality of something like that. Paul said it happens in the 210 market. Whether it’s a good idea is another issue, the hosts say. Joe is unable to run autofuel is the injected version, which is why he’s interested in it. Colleen said she’d rather have an injected engine than run mogas.

David wonders how perspective owners are so afraid of TBO. He has a 182 with an engine that’s nearly at TBO, and people who contact him are afraid of the high time. The hosts discuss strategies for buyers who may be looking at airplanes with engines at TBO. Assuming the engine is running well, a new owner can fly it on that “borrowed time” while they learn and enjoy the airplane. Alternatively, if the engine truly needs to be overhauled, the time down is obviously a concern for a new owner. Mike said he thinks it’s best to buy an airplane with a run-out engine. The price has been discounted for the cost of the engine, the seller is motivated, and worst case you have to overhaul it soon. And every hour and year that you don’t have to overhaul it is “free.” And when it does come time to do the overhaul, you get to do it to your spec.

Shalom has a Cirrus that isn’t behaving. If he sets the mixture at lean of peak, the fuel flows start to fluctuate. A few minutes later, it will drop off sharply, and then back quickly. The manifold pressure and rpm stay pretty consistent. He’s changed the fuel pump and the spider. Nothing has helped. Mike said if there’s a constriction in the fuel line between the fuel control unit and the manifold, it can cause oscillating fuel flow and lower flows.

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