LED lighting, soundproof, Sailor's Solutions Inc.      
 
product<br>image
Click to Enlarge
product<br>image product<br>image

FS200 Adjustable Marine Grade Raw Water Flow Switch
Protect your engine from overheating!

Flow Set Point Range
$219.95

View Cart

Throughout my 40 years of sailing I've experienced a variety of engine difficulties, as I'm sure you have, dear reader. My vote for the most common and possibly the most likely to cause damage is overheating. This is due to the many ways an overheating problem can occur. Here are the top five ways (add "while underway" to complete each sentence):
  1. I forgot to open the raw water seacock and I didn't check my exhaust for flow
  2. Strainer clogged
  3. Belt failure
  4. Impeller failure
  5. Pump bearing failure
There are a lot more reasons for overheating an engine but you get the general idea.

Here's the point: By the time your engine temperature sensor sends out an audible alarm (Assuming you have one and it works) it's already too late. She's cooking! What's for dinner? - Water hoses, a warped head and a belt "al dente".

Temperature damage in marine engines is well documented. I won't belabor the point but up until now there hasn't been an easy solution for monitoring the flow of incoming raw water.

We looked at units that sense water flow on the engine output but decided against it. We did not want to have to add any engine modifications. We also wanted a reliable test signal at startup and a continuous signal while the engine is running.

Bingo! We found it. The FS-200. It's rugged, reliable and simple to install. The FS-200 is a bronze N/C (normally closed) and N/O (normally open) switching device (SPDT) that does not impede the flow of raw water. It works equally well with salt and fresh water.

Adjustable switching set point: Each engine is a little different. The adjustable set point allows you to set the switch to activate at the exact flow that you need. The FS 200 will never inhibit flow regardless of the set point adjustment.

Unit Placement: The FS 200 is placed in-line between the raw water strainer and the raw water pump on your engine. The FS-200 is not connected to your engine in any way!

Easy to Install: You simply connect the N/O lead to your current engine alarm or install a new engine alarm. Connect the N/C lead to a dash panel light. I use a green 12VDC LED from Radio Shack®. The green light assures you that raw-water is flowing at a glance and gives you a cross-check for the alarm signal. Our instructions take you through the simple wiring required.

The FS 200 has a 1" inlet and outlet that adapts to all standard hose sizes. For example, a Yanmar 3GM30 uses a ½ inch bushing adapter and hose barbs. To adapt the FS 200 to your boat's raw water hose, just pick up the appropriate bronze bushings and hose barbs from your friendly local hardware store.

Specifications:
 Wetted Materials  
  -  Housing  Bronze 
  -  Shuttle  Teflon® 
  -  Bonnet  Bronze
  -  Spring  316 Stainless Steel 
  -  Other Wetted Parts  Viton® , Ceramic 
 Pressure Rating  
  -  Operating  400 PSIG @ 100°F (37.8°C) 
  -  Proof  800 PSIG @ 100°F (37.8°C) 
 Operating Temperature   -20°F to +200°F (-29°C to +93.3°C) 
 Repeatability   1% Maximum Deviation 
 Set Point Accuracy   ±10% 
 Set Point Differential   15% Maximum 
 Switch   SPDT, 20 VA 
 Electrical Termination   No. 18 AWG, 24˝ L., Polymeric Lead Wires 
1
#18 AWG., 24 " L., Polymeric Jacket
2
1/2 " NPT
3
Bonnet
4
Switch Housing
5
Inlet Port
6 NPT Port
A 3-1/4" (82.6 mm)
B 3" (76.2 mm)
C Hex 1-25/32" (45.2 mm)
The FS 200 fits in-line with the following engines in the 18 - 60 HP range including:
  • Yanmar
  • Westerbeke
  • Perkins
  • Volvo
  • Universal
  • Detroit Diesel
1-year manufacturer's warrantee.
Flow Estimator

You should check with your engine manufacturer for the an absolute recommendation for flow rate. We estimate 15 gpm / 100 bhp. Here's a calculator:

Engine HP:    Flow= gpm.
Instruction Manual: DOWNLOAD
product<br>image
Signal Mate2NM BiColor Bow Light with adjustable mounting bracket
An excellent LED Bow light. Easy to mount Made in USA!
On Sale Now. MSRP $242.00, Now $195.00!
$195.00
product<br>image
3M™ Scotchlite™ SOLAS Reflective Tape 2 inch wide- SOLD BY THE FOOT
See and be seen! Sold by the foot
$1.79
product<br>image
LED Spreader light from Scandvik
New product with the latest LED technology
$109.95
product<br>image
Lifeline AGM Deep Cycle Marine Battery
12 Volt (Size)24 (Capacity)80 Amp Hr

Charges deeper, faster and without maintenance!
Will not spill or leak!
$279.95
product<br>image
Razor sharp HOOKNIFE clears lines fast!
Hook and pull action slices entangled lines from your prop or rudder! NOT CURRENTLY STOCKED. Please see our new longer Hooknife in stock here: Hooknife 2
$84.95
product<br>image
Perfect Pole Telescopic Handle for Hooknife Rated #1 by Powerboat Reports!
This is the best pole/handle for our line slicing Hooknife. Extends your Hooknife's reach by 6'
$34.95
product<br>image
WinchRite ABT Cordless, Lightweight, Electric Winch Handle
Boat Show Special through February! Instantly electrify all your winches!
$749.00
product<br>image
SCAD MLC™ Masthead Light Controller
Turns ordinary anchor light into distress signal providing an important safety feature.
$99.00

Go to top of page.