aviatoreb Posted May 26, 2021 Report Share Posted May 26, 2021 I don't seem to have it in my huge pile of paper work that goes along with my 1981 airplane, or anyway I can't find it. What is the lever arm station for the backup electric vacuum in an M20K? Quote Link to comment Share on other sites More sharing options...
smwash02 Posted May 26, 2021 Report Share Posted May 26, 2021 Here's the image from my POH ('87 252). 98.4 inches and 12.0 lbs. 2 Quote Link to comment Share on other sites More sharing options...
aviatoreb Posted May 26, 2021 Author Report Share Posted May 26, 2021 Just now, smwash02 said: Here's the image from my POH ('87 252). 98.4 inches and 12.0 lbs. Thanks! Ooooh...it should be in my POH? I thought it would be in my vast pile of logs and 337 and STC stuff. Was it added upon original build? Does anyone know if the electric vacuum arm is identical in the M20K 231 as in the M20K 252? Quote Link to comment Share on other sites More sharing options...
smwash02 Posted May 26, 2021 Report Share Posted May 26, 2021 Just now, aviatoreb said: Thanks! Ooooh...it should be in my POH? I thought it would be in my vast pile of logs and 337 and STC stuff. Was it added upon original build? Does anyone know if the electric vacuum arm is identical in the M20K 231 as in the M20K 252? Welcome. Hopefully someone else can chime in and confirm, but it's my understanding the 231 didn't offer the dual alternator or backup vacuum. It is a stock feature of the 252. 1 Quote Link to comment Share on other sites More sharing options...
Tom 4536 Posted May 26, 2021 Report Share Posted May 26, 2021 My 231 had an electric backup vacuum. 2 Quote Link to comment Share on other sites More sharing options...
PT20J Posted May 26, 2021 Report Share Posted May 26, 2021 Note that the equipment list shows the weight and arm for the entire installation (pump, hose, wiring) and not just the pump. If you want just the pump W&B you can weigh the pump and figure the arm from the fuselage station drawing in the Service Manual. Quote Link to comment Share on other sites More sharing options...
aviatoreb Posted May 26, 2021 Author Report Share Posted May 26, 2021 5 minutes ago, PT20J said: Note that the equipment list shows the weight and arm for the entire installation (pump, hose, wiring) and not just the pump. If you want just the pump W&B you can weigh the pump and figure the arm from the fuselage station drawing in the Service Manual. Oh - of course. Anyway, yes that is what I want - for the full backup vacuum w&b hoses and all. I don't have that service manual. E 1 Quote Link to comment Share on other sites More sharing options...
smwash02 Posted May 26, 2021 Report Share Posted May 26, 2021 This article suggests that when the 231 moved to a 28V system, the electric vacuum backup became standard equipment. 1 Quote Link to comment Share on other sites More sharing options...
aviatoreb Posted May 26, 2021 Author Report Share Posted May 26, 2021 Just now, smwash02 said: This article suggests that when the 231 moved to a 28V system, the electric vacuum backup became standard equipment. Huh! I didn't know there was ever a 28v 231. I thought 28v came with the 252. Anyway maybe electric pump was a factory option but not standard in my earlier 231. I have here an equipment list with everything from sump cup to curtains in it but no electric pump. And anyway, yeah I want that number for electric pump plus hoses. Quote Link to comment Share on other sites More sharing options...
carusoam Posted May 27, 2021 Report Share Posted May 27, 2021 @aviatoreb Erik, See if you can post a pic of your installation... with relationship to the access panel... It may have gotten a standardized location early on... Make no assumptions... because, Mooney could have moved it for a variety of reasons, and moved it back on the next model... Best regards, -a- Quote Link to comment Share on other sites More sharing options...
aviatoreb Posted May 27, 2021 Author Report Share Posted May 27, 2021 10 hours ago, carusoam said: @aviatoreb Erik, See if you can post a pic of your installation... with relationship to the access panel... It may have gotten a standardized location early on... Make no assumptions... because, Mooney could have moved it for a variety of reasons, and moved it back on the next model... Best regards, -a- Here it is. 1 Quote Link to comment Share on other sites More sharing options...
PT20J Posted May 27, 2021 Report Share Posted May 27, 2021 That looks just like the one I removed from my 1994 M20J except mine was located where your ELT is. Looks like yours has been moved: you can see the old screw holes and the hose and wire have been extended. Skip 1 Quote Link to comment Share on other sites More sharing options...
aviatoreb Posted May 28, 2021 Author Report Share Posted May 28, 2021 16 hours ago, PT20J said: That looks just like the one I removed from my 1994 M20J except mine was located where your ELT is. Looks like yours has been moved: you can see the old screw holes and the hose and wire have been extended. Skip Very interesting - was your arm and weight the same as shown in the table above from smwash02? BTW yes it is for removal of the entire installation 1 Quote Link to comment Share on other sites More sharing options...
PT20J Posted May 28, 2021 Report Share Posted May 28, 2021 44 minutes ago, aviatoreb said: Very interesting - was your arm and weight the same as shown in the table above from smwash02? BTW yes it is for removal of the entire installation Yes. 1 Quote Link to comment Share on other sites More sharing options...
aviatoreb Posted May 28, 2021 Author Report Share Posted May 28, 2021 2 minutes ago, PT20J said: Yes. Thanks! Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.