Great Planes Lancair 60 ARF - GPMA1347 - Manual (Page 18)

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5. Locate the left and right halves of the engine mount.
Remove the tabs.
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6. Mount the engine mount to the fuselage. We will be
installing the engine in a side-mounted configuration. Install
the mount with four 8-32 x1" [8-32 x 25mm] socket head cap
screws, four #8 lock washers and four #8 flat washers.
Leave the bolts slightly loose.
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7. Position your engine onto the engine mount. With the
engine resting on the engine mount rails, center the engine
and engine mount. Then, tighten the engine mounting bolts.
With your engine still resting on the rails, position the engine
so that the distance from the firewall to the front of the
engine thrust washer is 5-7/8" [150mm]. With the engine
properly positioned, resting on the engine mount, slide the
cowl onto the fuselage to be sure the engine is extending
out of the cowl far enough. If you plan to use a spinner other
than the one supplied with the kit, make sure you have
adequate clearance for your spinner.
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8. Using the engine as a guide, mark the four holes for
the engine bolts on the engine mount. This is easily
accomplished with a Great Planes Dead Center
™ Tool
(GPMR8130). Install the engine onto the engine mount. Drill
four #36 (7/64") [2.8mm] holes in the mount. Then, use a
6-32 tap to thread the holes.
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9. Use four 6-32 x 1" [6-32 x 25mm] socket head cap
screws, four #6 lock washers and four #6 flat washers to
install the engine onto the mount.
As previously stated, the O.S. .61 and the Top Flite in cowl
muffler (TOPQ7917) and Top Flite muffler header
(TOPQ7920) work well to give a completely cowled
installation of the engine and muffler. For everything to fit
you will need to make the following modifications to the
muffler and header.
❏
1. Remove 1/4" [6mm] from the end of the muffler header
and the muffler inlet. This can be done with a hacksaw,
rotary cutting wheel or grinder.
❏
2. Install the washer and pressure tap into the muffler.
Use thread locking compound on the pressure tap before
threading it into the muffler.
Join the Muffler
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