replacing rubber engine mount bushings

Larry Lowenkron

Larry Lowenkron

Member
Looks like its time to replace the rubber bushings on my engine mount. How do you lift the engine? I noticed some threaded holes in the top by each cylinder...are those for inserting eye bolts to lift it. I'd appreciate any suggestions. Thanks! Larry
 
Ha.......Larry, you are in for some entertainment as this chore is oft' neglected or addressed only at O/H. It is best done at annual inspection.You do have new rubbers, correct? I did this on my 14-12 last year. First remove cowl. I don't think you can do this with the nosebowl on, so the prop comes off as well. Remove the two front mount bolts and loosen the rear bolts. Lift the front of the engine by the crank end about two inches. R&R the front rubber cones and top washers. Slip the bolts back in place heads up. Leave the nuts off. That was the easy part.......Now remove the rear bolts. Hopefully, the last time the engine was installed the left rear bolt was put in head down, as you can't get it out if it is head up. Now you can lift the rear of the engine up enough to R&R the rubber cones. However, I had to loosen up the carb almost to the point of removal so I could get clearance with the engine mount as I was lifting the rear of the engine at the starter pad. I had to cut off my left rear bolt as someone installed it head up before cylinder #1 was installed. Torque up nuts just to the point of further compression of the rubber....no more. Have fun! Dan
 
I was thinking more about this project last night. ... I also remember having to loosen the generator a bit so I could raise the front of the engine. This is one of those projects you look forward to looking back on.
 
Thanks Dan, I am (or was) finishing my annual when this came up. The bolt by No. 1 is in upside down, so should be ok there. However, I now have a Skytec starter, and am going to have to figure out how to lift the back of the engine. Do you know what those threaded holes are for in the top of the case by each cylinder? I have ordered new intake packings from Susan, (April actually) today. I thought I could disconnect the intake pipes and leave the manifold on. If I have to take the generator off, I will. Will let you know how this works out. Thanks again for the help! Larry
 
You can thread in eyes or cap screws and make a bridal. You can lift with a strap around the base of your starter. You aren't lifting much; maybe 150-170 lbs.
 
Larry, there is a good drawing of an engine lifting sling in the overhaul manual for the vertical engines,eg 6v335-A-B. It is a much better manual than the 150/165 manual. It has 2 pages of drawings of special overhaul tools. Anyone doing major work on a 150/165 should have the vertical engine book in addition to the rather poor 150/165 overhaul manual. I think Essco still sells them.______Grant.
 
Grant, the closest i could find to your reference for a manual (vertical engine book) on essco's site for franklin engines was this >> Franklin 6V4-178-B32,B33,6V4-200-C32 Overhaul Instruction Manual <<.

is this the one you are recommending?

jeff
 
Jeff, it is "Overhaul Instructions" Franklin Aircraft Engines, Models 6v-178-B32,B33_____6V4-200-C32,C33______6V-335-A,-B Franklin Engine Co. Publication Date:May 1964. I just looked it over, and I dont see Essco anywhere on it, so I may have gotten it somewhere else. I really dont remember. It is 87 pages long. Other than the accessories and the front main bearing, the horizontal and vertical engines were very similar. I hope this helps._____Grant.
 
Jeff, I just reread your post and that is probably the same manual. Ask them about the date ,and how many pages. That should tell you something._____Grant.
 
Grant,
I just looked at the picture you referred to in the manual. Looks that is what the threaded holes I was wondering about are for. So, if all is well, tomorrow is the day. Looks like I am going to have to take a lot apart to get there. I noticed that the engine mounting bolt by # 6 is also upside down. It should make for easier removal/installation...I hope.
 
I actually finished this. Wasn't that bad, used eye bolts threaded into the top of the engine in the holes I was wondering about and Dan mentioned. Made a harness as Dan said and lifted it up. Almost too easy...what will go wrong now?

LL
 
You must log in or register to reply here.
Back
Top