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If the prop spacer is positively identified as non contributing to the vibration, go there : http://www.sacskyranch.com/eng.htm It lists all possible problems of engine installations. The newly assembled engine might have an ignition problem, the engine mount rubbers have been mentioned. The carburetor can be at fault, the Spark plugs might be bad, even when new. The engine might have been wrongly assembled, wrong parts used - many possibilities. Oh and even if the prop spacer is not the cause for the vibration, I would get rid of that. The cowling has adjustable hardware. The mechanics need to open their eyes AND their brains. Hartmut ----- Original Message ----- From: richard logston To: Hartmut Beil Cc: Ctech Sent: Monday, January 29, 2007 8:50 PM Subject: Re: [COUPERS-TECH] engine help Hartmut, Thanks for your reply, There was not a vibration problem before the overhaul. Richard L. ----- Original Message ----- From: Hartmut Beil To: richard logston Cc: Ctech Sent: Monday, January 29, 2007 11:23 AM Subject: Re: [COUPERS-TECH] engine help Richard. You did not indicate what brand propeller you have, but it seems like the 71-48 McCauley is suitable for a C-75 installation. See the Type Certificate: Propeller - fixed pitch metal, McCauley 1A90CF or 1B90CM 26 lb. (-32) (a) With Continental C-75 series engines only static r.p.m. at maximum permissible throttle setting: not over 2100, not under 1950. No additional tolerance permitted. Diameter: not over 73 in., not under 71 in. Also the cowling rails are attached to the airframe with what it looks to me adjustable pieces that allow for a proper adjustment. Instead of using spacers, which by the way are not clear to me where spacers are of help in a too tight fit, just loosen the bolts that are holding the attachment hardware to the cowling rails. Adjust , retighten. Done. Vibration can be caused by many other things too. Prop being one, more to that here: http://www.sacskyranch.com/eng.htm Look for rough or vibration, to advise on the rough problem one would need a little more history like had it ever been run smooth or so. Hartmut ----- Original Message ----- From: "richard logston" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]>; "AJ DeMarzo" <[EMAIL PROTECTED]> Cc: "Ctech" <[email protected]> Sent: Monday, January 29, 2007 7:58 PM Subject: Re: [COUPERS-TECH] engine help > ----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]---- > > > Ercoupe Guru's. I have a young fellow in the hanger next to me who also owns > an ercoupe with a 75hp continental that has been majored with new millennium > cyl.pistons, rings, push rods etc. The aircraft has been a thorn in his side > expense wise. The aircraft has been in a repair shop for over a year, wings > off, all center section rivets electronically checked, main fuel tank leak > repaired,. tail section removed, cleaned up installed with new bolts. Other > repairs as needed.The engine installed with new millennium cyl. Test flying > shows a vibration level that is not acceptable. He has tried the prop in > different positions to no avail. this was none at a dynamic balance shop. I > think he said he had a figure of 1.7, the mechanic said that was high and > the best he could do.Needles to say he is at his wits end over this.He has > talked to several aircraft mechanics about this problem, and no one has been > able to solve this problem yet. He also has a clearance problem with the > nose bowl protruding too far forward rubbing the prop, a aluminum spacer was > added to maintain clearance. I guess my question on this issue is can one > cut back the cowling rails with out running into other problems. This is not > an isolated problem as I have some propeller marks on my nose bowel that > dates back sometime in the past. I guess my question is has anyone run into > this problem before and the cure. Sometime as individuals we may not be able > to solve problems, but bringing a group knowledge base together can. Thank > you in advance for my friend Richard L. 3041H PS. I would loan him my prop > to try but I have a 85hp with a 71-48. > ----- Original Message ----- > From: <[EMAIL PROTECTED]> > To: "AJ DeMarzo" <[EMAIL PROTECTED]> > Cc: "Ctech" <[email protected]> > Sent: Monday, January 29, 2007 6:49 AM > Subject: Re: [COUPERS-TECH] engine help > > > > ----[Please read http://ercoupers.com/disclaimer.htm before following any > > advice in this forum.]---- > > > > > > - 8 No provision for starter or generator > > - 12 Starter, Generator and Associated parts installed > > - 14 Lord Engine mount bushings installed. Otherwise, like -12 models > > - 16 Vacuum pumpo adapter. Otherwise like -12 models > > > > F Flange type crankshaft installed (replaces tapered shaft) > > H Crankcase and crankshaft adapted to feed oil to controllable pitch > > propeller > > > > Eliacim > > N87071 > > > > > > > >> ----[Please read http://ercoupers.com/disclaimer.htm before following any > >> advice in this forum.]---- > >> > >> > >> The "dash" numbers always confuse me. Isn't the -12 the engine with the > >> vacuum pump? I thought we had the -8 but it's early and I haven't fully > >> awakened. > >> > >> ----- Original Message ----- > >>> [EMAIL PROTECTED] wrote > >>>> I'm looking for an STC or 337 for installing a C-85-12 in a 415-C? Can > >>>> anyone help? > >> > >>> Ed, > >>> I believe that no 337 is required. Refer to the type certificate for the > >>> 415-C (A718 Item 110.). > >>> > >>> John Roach > >>> N 2427H > >> > >> ============================================================================== > >> To leave this forum go to: http://ercoupers.com/lists.htm > >> > >> > >> > >> > > > > > > ============================================================================== > > To leave this forum go to: http://ercoupers.com/lists.htm > > > > > > > > > > > ============================================================================== > To leave this forum go to: http://ercoupers.com/lists.htm > > > > ============================================================================== To leave this forum go to: http://ercoupers.com/lists.htm
