13
7241
5
2022
-
ERV130 & ERV170 & ERV210
MG_0122
Apply MS polymer or
equivalent on flange
surface
Tighten bolts to
4Nn/ 2.9lb/ft
Retract thruster
Retract thruster
Hatch Installation
1. Fit custom made pin bolts to the tunnel rings. The ends of the bolts must be sharp to create marks in the hatch. The pin bolts must be in
correct height so the hatch will fi t in its inner position.
2. Place hatch in its inner position, then press or tap with a hammer to create punch marks inside of the hatch.
3. Drill 4 marked holes and countersink the outer hull side.
(NB: drill holes 90 to the hatch surface.)
4. Temporary fi t the hatch to the tunnel rings. Ensure the bolts do NOT conflict with the propeller tunnel.
(NB: Bolts can be cut, depending on hull
thickness.)
5. Fill the gap between hatch and hull edges.
6. Apply a layer of aluminium or duct tape on hatch opening edges on the hull. Apply Epoxy fi ller or equivalent to hatch edges to create a perfect
seal.
7. Operate the thruster to “IN” position. Smooth out the fi ller and add more if needed. After curing time, grind and smooth the surface.
8. Unscrew and remove hatch to smooth off excessive material before coating the hatch.
9. Apply fi ller on to tunnel rings contact surface, so the hatch will be secured properly. Now re-install hatch in its correct position. Tighten bolts so
hatch will fi t properly.
10. Apply coating inside and outside of hatch opening on hull.
MC_0068
!
Please refer to the graphic for special considerations relating to your model
!
MG_0129
1
4
5
6
7 - 9
2
3
Pin bolts with sharp
ends to punch mark
the hole pattern to
hatch
Tap/ press to get punch
marks of hole pattern
Drill holes
Countersink all
4 holes
Apply a layer of
aluminium or duct
tape on hatch
opening edges
Apply filler on
hatch edges
Smooth out filler and add
more if needed. After curing
time grind and smoothen
the surface
Apply coating
Tighten bolts
and nuts
Glue tunnel rings
to hatch before
tightening bolts
Inside of hatch
Outside of hatch
Ensure to adjust the
hatch bolts so they do
NOT conflict the tunnel.
Bolts must be tightened
firmly.
Run the tunnel IN with
filler on hatch edges
IMPORTANT
The hatch contact edges and the hull contact
edges MUST work as the mechanical end
stop. During cruising, slamming forces from
the water must be absorbed by these areas,
not the thruster.