14
NOTE:
HXL, HSK840 thru 850 models do not use the
E.G.R. system.
An E.G.R. (Exhaust Gas Recirculation) tube is placed
in the block of the TVS/TVXL840 engine and extends
into the outer chamber of the muffler.
A controlled amount of exhaust gas is drawn into the
crankcase of the engine to aid in the movement of the
air/fuel mixture to the combustion chamber.
However, if for any reason the plug should come out of
the engine, it can be reinstalled. Clean the block and
the port plug with lacquer thinner or comparable product
so that it is free of all oil.
Using a small, thin center punch or large scribe, stake
the port plug in 12 evenly spaced positions.
Use 5 minute epoxy and fill in around the outer diameter
of the plug. This will ensure you have no air leaks.
Allow epoxy to cure for 24 hours before using engine.
Install the E.G.R. tube in to the proper depth by using
service tool number 670318.
PORT PLUG REINSTALLATION
The large transfer port plug's on all 840 series engines
are pressed into the block and should not have to be
removed.
E.G.R. TUBE
SERVICE & INSTALLATION
TVS / TVXL 840 ONLY
E.G.R. PASSAGE
It is a good idea when decarbonizing the exhaust ports,
check the E.G.R. passage as well.
The E.G.R. tube is a hardened steel roll pin. To remove
the tube, grasp it with a vise grip and rotate in the
direction that will collapse the tube and allow it to be
removed.
It is best to clean this passage when the piston is out of
the bore to eliminate any possible damage to the piston
or bore. Use any non-metallic material and clean the
E.G.R. port in the cylinder.
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