installing a new prop. Install the nut carefully to 240 inch pounds.
BELT TENSION OR BELT REPLACEMENT
You can check the belt tension without removing the clutch cover. Simply remove the side access plug on
the right side of the casting. With the tool inserted into the access hole, and tension tool in the palm,
observe the scale alongside the tension gauge and pick a point on the casting for reference. The objective is
to depress the belt in its center : (not along the edge of belt because this will twist the belt rather than push
the center) and then note how many pounds, as indicated by how far the small o ring moved, it took to
move the belt the ¼”. new belts are tensioned at 16 to 20 pounds, used belts should measure 12 to 16
pounds. If less than 12 pounds, tension the belt.
Belt Tension:
The Gates belt is tightened by adjusting the bolt on the belt tension idler pulley. The belt tension
adjustment bolt is located on the left side of the case. We highly recommend you place thread penetrating
oil on the adjustment bolts threads 24 hours prior to adjusting the belt. A corroded bolt (especially if run in
salt water) can jam and even break off.
NOTICE: We use the highest quality stainless bolts. However, we do not warranty bolts that are corroded
and break off. This is a customer maintenance item.
-Remove the face bolts from the upper drive cover
-Loosen the idler pulley bracket bolt.
-Now, tighten the belt by turning the adjustment bolt. Check tension each time you turn the bolt one turn. It
does not take much to tension the belt. Once adjusted to the correct tension tighten the idler pulley bracket
bolt.
-Run the engine a couple minutes and recheck the belt tension. Tension again if needed.
- Apply sealer to the top case and bolt the cover on.
Belt Tension
adjustment bolt
Idler Pulley Bracket
Bolt
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