Engine Alignment

FreeBeeTony

Captain
Joined
May 15, 2002
Messages
3,991
One of my next tasks is to install new motor mounts on the front and bushings/hardware in the rear.
I measured to the best of my ability the height of the old front mounts and duplicated the adjustments on the new.
Even went as far as tracing the position of the old.
I know I still need to check w/ an alignment toll when the time comes......just trying to get as close as possible out of the gate.

Any other suggestions?
 

wellcraft-classic210

Master Chief Petty Officer
Joined
Sep 22, 2010
Messages
839
Yes--1 suggestion:

If you can find a 1.00 diameter shaft about 7-12 inches long you can check the Coupler for runout as the engine is spun to different positions by watching the surrounding gap at the gimbal bearing.

Determine which way the engine needs to move, splitting the difference for any Coupler runout.


The large alignment shafts are excellent for ensuring the Gimbal bearing is pointing at the coupler and in turn ensuring the drive shaft will enter on assembly. // But it can be hard telling how to adjust the engine looking at the grease marks on the shaft tip.
 

alldodge

Moderator
Staff member
Joined
Mar 8, 2009
Messages
42,286
Install rear motor mount bolts just snug.

Connect hoist to ring on the thermostat housing and lift just enough to have space under the front motor mounts. Loosen top nut and adjust bottom nut with fingers so the motor mount lower nut is against the bottom of the mount. Release all weight off hoist and fasten motor mount feet to the stringers.

Now check alignment, and from this point forward, adjust both sides equal amounts either up or down until alignment is achieved.

Once down, torque rear and forward mounts tight and recheck alignment.
 

Bt Doctur

Supreme Mariner
Joined
Aug 29, 2004
Messages
19,315
I have removed the yoke and undercut the shaft where it passes thru the gimbal bearing an 1/8th inch. Gives you a visual indicator on where and how much to move the motor .Once resonablely centered you can use a 1/8 inch welding rod to dial it a bit further and then use the official alignment bar.
 
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