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CMP / Keller©
Boat Racing Hardware
Speedometers
Please note:
 | Prices are subject to change without notice. |
| NOS parts and components for Keller /
Willco / CMP speedometers are in extremely limited supply. Many
important parts have not been manufactured in over 30 years. |
| Please contact us for your speedometer
needs, but please understand that we may not have parts to build a complete
speedometer for you from scratch in the speed range you desire. |
| Often it is necessary for customers to
obtain a used speedometer from other sources (such as Ebay) and then have us
repair, refurbish, and recalibrate it for you. We can often return a
used speedometer to like new condition for very minimal cost. |
| Please let us know how we can
help. Thanks for your understanding. |
Speedometer Assembly, Detachable Outboard Model.
The complete speedometer assembly includes the speedometer dial head, the pitot tube,
the pressure hose with tether line, and two T-Plates with mounting screws.
One T-Plate is used to mount the speedometer dial head to the dash and the
second T-Plate is used to mount the pitot tube to the transom. Pressure
hose end with tether line is screwed into pitot tube fitting. Other end of
pressure hose is screwed into speedometer dial head.
Pressure hose is typically routed through cockpit side holes under deck from
transom to dash board while in use. Tether line is typically tied to a
transom handle. Tether line helps avoid damage to pitot tube, motor, or
propeller, should pitot tube be knocked loose during use. Dial head,
pressure hose, and pitot tube may be easily installed for testing and then
removed for racing by slipping dial head and pitot tube in and out of T-Plates
at dash and transom. Specify speed range desired and either 8' or 10'
pressure hose.
Shown above is a 35 - 75mph Speedometer Assembly with 10' pressure hose.
Speedometer notes:
| CMP / Keller speedometers utilize water pressure gauge technology - the
higher the water pressure, the higher the speed. The pitot tube is
mounted on the transom, extends down into the water, and picks up the water
pressure. Pressure is transmitted to the dial head mounted on the dash
board via the pressure hose. |
| Be sure there are no pressure leaks at the hose fittings. Be sure
there are no obstructions at the pick-up. Be sure the pitot tube
pick-up opening remains in the water. |
| The dial head is a sensitive calibrated instrument. It should be
handled carefully in storage, transportation and usage. |
| Water in the pressure hose and pitot tube should have any accumulated
water drained before long storage. Hang the assembly so that the dial
head is up and the hose and pitot tube are down so that moisture can drain
out from the hose and tube. The dial head should never be left in
freezing temperatures. |
| A pressure gauge is most accurate between the "9 o'clock" and
the "3 o'clock" positions on the dial. Thus in the selection
of the speed range for your application, try not to have the typical maximum
speed at the "6 o'clock" position. For example if you boat
is capable of 75mph, consider ordering a speedometer with a maximum of
80mph. Of course you will also want room for improvement in speed as
you refine your outfit as well. |
| The are considerations as well for the low range of your
speedometer. The wider the range, between low and high, the smaller
the dial increments between each mph increment will be. The smaller
the range, the larger the dial increments will be. The larger the
increments, the easier it will be to see small changes in set-up or
propeller. You'll also want to be able to measure your slower speed
through turns and you may also wish to use the speedometer on boats of
different classes with different speed ranges. |
| Many users of pressure gauge speedometer technology find it has several advantages over GPS technology. The most important is accuracy
in the turns. Many veteran racers will tell you that many races are
won or lost in the turns and pressure gauge speedometer technology can
provide highly accurate speed readings in turns. Other advantages
(depending upon GPS model) are cost, ability to read the dial from the
driving position, no battery, and the ability to have actual speed readings in real-time
available to
the driver during the testing run. |
| We also offer recalibration and repair services for Keller, Willco, and
CMP speedometers and components. |
| A single detachable outboard model speedometer assembly maybe used on
multiple hulls. Just order an additional pair of T-Plates for each
hull. |
| Speed ranges listed are only examples, contact us for availability of
additional speed ranges, custom speedometers for vintage restorations,
different mounting options, and custom speedometers for inboard and
unlimited class applications. |
Individual assembly components are also shown in greater detail in the photos
below.
35 to 75mph Speedometer, photo shows front view of speedometer dial head.
35 to 75mph Speedometer, photo shows side and back of speedometer head
and ends of pressure hose. Back view of head shows rubber mounting that
slips into dash mounted T-Plate.
T-Plate with mounting screws, two utilized, one for attaching
speedometer head to dash and one for attaching pitot tube to transom. Some
models are cast aluminum and some are machined aluminum. Remains attached
to boat when the speedometer dial head, the pressure hose, and the pitot tube is
removed.
Pitot Tube slips into transom mounted T-Plate.
10' Pressure Hose with fittings and tether line. End with tether line is
screwed and tightened into pitot tube. Other end is screwed and
tightened into speedometer dial head. Tether line is typically tied to a
transom handle. Tether helps avoid damage to pitot tube, motor, or
propeller, should pitot tube be knocked loose during use. Specify 8' or
10' length. Pressure hose is typically routed through cockpit side holes
under deck from transom to dash board while in use.
86SP, Steering Wheel Center T-Plate. Designed to mount to the
center of the old style #180 aluminum Keller steering wheel. Cast aluminum,
black crinkle finish, sanded highlight, mounting screw and spacer
included. Allows the speedometer head to be mounted to the center of the
steering wheel. Remains stationary when wheel is turned. Cannot be
used with current style steering wheel assemblies such as 188 or 1885.
Speedometer Assembly, Inboard Model. Shown above is the Keller
inboard model speedometer assembly. The speedometer head shown is a 60mph
to 180mph model. Also shown is the nylon pressure line and line mounting
clips, the chrome through transom fitting, and the flexible pressure hose from
the transom fitting to the pressure pickup (typically mounted on the rudder). (See below for photo of back side of speedometer head showing
dash mounting hardware.)
 .
Speedometer Head, Inboard Model. Shown is back side of inboard
model head. Head is mounted through a single hole in the dash board.
The plastic hand nut with foam washers for front and back of dash board is
shown. Makes a clean foam-insulated installation with just a single hole
through dash.
| Part
No. |
Description |
List price |
Unit |
|
Speedometers,
Speedometer Components |
|
|
|
Speedometer
assemblies, detachable outboard models and inboard models |
|
|
|
Up to 60 mph |
$174.95 |
each |
|
61 to 80 mph |
$194.95 |
each |
|
81 to 100 mph |
$214.95 |
each |
|
101 to 200 mph |
$234.95 |
each |
|
Speedometer components |
|
|
| 80C |
T-Plates |
$10.95 |
each |
| PT |
Pitot tube |
$36.95 |
each |
| C2 |
Plastic crystal (screw-in style) |
$7.95 |
each |
| PH |
Pressure hose only (8’ or 10’) |
$23.95 |
each |
| PH-DF |
Fitting, pressure hose - dial
head |
$5.95 |
each |
| PH-PF |
Fitting, pressure hose - pitot
tube |
$5.95 |
each |
| PH-T |
Tether, pressure hose |
$4.95 |
each |
| PH-A |
Pressure hose with fittings and
tether (8' or 10') |
$38.95 |
each |
| RM |
Rubber mount |
$7.95 |
each |
|
Speedometer
Repair & Recalibration Services |
$45.00 |
hour |
Warranty Disclaimer
DUE TO ITS INTENDED USE, NO WARRANTY OF
MERCHANTABILITY OR FITNESS FOR ANY PURPOSE IS MADE BY SELLER WITH RESPECT
TO THE SUBJECT GOODS. BUYER HAS EXAMINED THE GOODS PRIOR TO
INSTALLATION AND USE AND ACCEPTS THE SAME "AS IS" WITH NO
WARRANTY, GUARANTEE, LIABILITY, EITHER EXPRESSED OR IMPLIED BY PORTAGE BAY
SYSTEMS, INC., COMPUTERIZED MARINE PRODUCTS, OR ITS AUTHORIZED DEALERS.
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