20 • SPARTAN
Adjusting the Trim Tabs
Spartan features stainless-steel trim tabs to help set the angle of the boat’s hull as it rides in the water. Setting the trim angle correctly will
provide maximum speed and efficiency from your model. From the factory, the trim tabs are set for best all-around performance and stability
at Spartan’s maximum speed, but you can experiment with their position to improve performance. Slightly bending the tabs down will cause
the bow to run closer to the water, “wetting” more of the hull and increasing stability. Be sure to set the left and right trim tabs equally.
ADJUSTING YOUR MODEL
Hold a straightedge against the hull so it
extends past the trim tab. The tab will rest
on the straightedge or be within 1mm of
its edge. This is the stock setting. Rigorous
testing has shown this setting to offer the
best handling in most conditions.
To adjust the trim tab,
grip it securely with a pair of
pliers as close to the bend as
possible. Flex the trim tab down
to set a new angle. Note that the
trim tab has some spring-back,
and will need to be flexed slightly
farther than the actual position
you wish to set.
This illustration shows 1mm of
downward defection. This small setting
will cause a significant change in the
hull’s attitude. Settings of 2-3mm
deflection should be considered
the maximum.
A
B
C
Optional Accessory: Machined
Aluminum Trim Adjusters
For the most precise trim
adjustments, Spartan can
be outfitted with machined
aluminum trim adjusters.
These install using the
existing trim tab mounting
holes, so no drilling is
required. Once installed,
the adjusters’ stainless-
steel screws can be used
to make fine trim settings.
Once Spartan is trimmed to
your preference, corrosion-
resistant nickel-plated nuts
hold the adjustment. Refer
to the parts list for more
information and accessories.
Rudder Angle
Adjustment Screws
Stock Position
0°
(Parallel to back of boat)
2°-3°
Adjusting the Rudder Angle
Spartan features an adjustable rudder support that permits the angle
of the rudder to be changed to alter the model’s cornering feel.
The stock setting is 0°, or “vertical,” meaning the rudder is parallel
with the transom (see illustration). By loosening the rudder angle
adjustment screws, the rudder can be pivoted back up to 3°. Altering
the rudder angle effects how much the rudder “lifts” the hull while
cornering. Increasing the rudder angle will allow the hull to ride
higher while cornering, which may potentially raise cornering speeds
but lessens stability. If you experiment with this feature, remember
to retighten the adjustment screws after making your setting.
