ORIGINAL: Greg Wright
Im' just curious why you think that it is a must to put an electric fuel pump on the moki.I have been hearing different stories from a lot of people and i'm just looking for an opinion from you.
OK, fair enough. Here is why I believe this. The internal pump on the Moki engine is marginal at best. Plus, it is vented with a line from the front housing, that is packed with lubricant. This lube eventually works it's way into this vent line and can block it, giving a marginal pump little chance to supply the engine. Now, a guy can keep an eye on this line and maybe head this off, or maybe not. Quite a risk with this caliber of aircraft. Add to that that with the pump, one can expect as much as a 300 RPM increase of cool power to the power range, due to the added fuel, and easier starts. All this adds up to an easy decision for me.
This opinion is shared by some of the most knowledgeable in the Moki use, who I very much respect, like Scott Prossen (the one who started the long running thread here on RCU regarding Moki care and maintenance), and Gotz Voglesang, who personally knows the Moki people, and is a dealer for the engine.
I know there are users here in the US who don't use the pump, Mike Barbee being one well known modeler who I can think of, but I view this as inexpensive insurance for my expensive aircraft. A dead stick is a very sad reason to loose a plane I have put so much time and $ into.
I want my aircraft to have the best chance I can give them mechanically, at least. My thumbs are another subject.
On the battery, yes, 2200 would be my minimum, and I may just go larger myself, if I have the space. I was using a 2200 on the engine that was in her, but this is a high energy ignition.