Airmar Cored Fiberglass Hull—How to Prepare Hull for Thru Manuel d'utilisateur télécharger pdf

hull’s outer skin to

Materials Needed

Safety goggles

Dust mask

Electric drill

Drill bit, hole saw, or spade bit for (see Figure 1):

pilot hole: 3mm

⁄

22mm (

⁄

") diameter threaded stem

exterior hole: 22mm

⁄

interior hole

: 35mm

⁄

26mm (1") diameter threaded stem

exterior hole: 26mm

interior hole

: 38mm

⁄

43mm (1

⁄

") diameter threaded stem

exterior hole: 43mm

⁄

interior hole

: 54mm

⁄

51mm (2") diameter threaded stem

exterior hole: 51mm

interior hole

: 60mm

⁄

Mild household detergent or weak solvent (alcohol)

Sandpaper

Fiberglass cloth and resin (see #5)

cylinder, wax, tape, and casting epoxy (see #5)

Installation in a Cored Fiberglass Hull

install a thru-hull sensor in a cored ﬁberglass hull, the core

(wood or foam) must be carefully cut and sealed. The core must

be protected from water seepage and the hull must be reinforced

to prevent it from crushing under the hull nut allowing the

housing to become loose.

Caution

: Always wear safety goggles and a dust mask.

a. The sizes given are suggestions. The optimal interior hole diameter is

effected by the hull’s thickness and deadrise angle. It must be large

enough in diameter to allow the core to be completely sealed.

1. Drill a pilot hole from inside the hull (see Figures 2 and 3).

For installations with a fairing, drill perpendicular to the

waterline. If there is a rib, strut, or other hull irregularity near

the selected mounting location, drill from the outside the

vessel.

Note: If the hole is drilled in the wrong location, drill a

second hole in a better location. Apply masking tape to the

outside of the hull over the incorrect hole and ﬁll it with

epoxy.

2. Using the exterior hole saw, cut a hole from outside the hull

through the

outer

skin only.

Figure 3. No fairing and minimum deadrise angle

inner skin

core

outer skinsolid or hollow cylinder

pour in

casting

epoxy

9-12 mm

(3/8-1/2")

larger than the

hole through the

hull’s outer skin

EM 17-128 rev. 2 11/96

hull

INSTALLATION INSTRUCTIONS

Thru

Hull Sensor

in a Cored Fiberglass Hull

IMPORTANT

: Please read these instructions

completely before proceeding with the installation.

hull

outer skin

solid or hollow

cylinder

pour in

casting

epoxy

core

inner skin

Figure 2. For installation with a fairing

43mm (1

⁄

51mm (2")

22mm

26mm

Figure 1. Diameter of the sensor’s threaded stem

(

⁄

(1")

Dimension equal to

the thickness of the

ensure adequate

clearance

1 2

Materials Needed 1
Checking for Leaks 2

Résumé du contenu

Page 1 - Materials Needed

hull’s outer skin to Materials Needed Safety gogglesDust maskElectric drillDrill bit, hole saw, or spade bit for (see Figure 1):pilot hole: 3mm or

Page 2 - Checking for Leaks

3. From inside the hull using the interior hole saw, cut throughthe inner skin and most of the core. The core material can bevery soft. Apply only

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Airmar Cored Fiberglass Hull—How to Prepare Hull for Thru Manuel d'utilisateur

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