Gauge or Pee fititng for pontoon

Hi folks. just picked up a pontoon with a 40 hp Force 99 model year. it starts easily and runs great.

With it mounted to a pontoon boat, obviously I can't see if water is coming out the upper exhaust outlet.

So I can see three options.

1) Pressure gauge kit, but reading old threads these motors only make between 5-10 psi water pressure and the gauges are ranged at 40-45 max. So the reading would seem to be in a very small range of the gauge. Thus little useable info.

2) A pee fitting. I had a Merc 35 on a pontoon. They put the fitting in the lower half of the engine cowl using a 45 degree fitting. It created a "rooster tail" easily visible from the helm and didn't interfere with cowl removal.

3) Never seen it but a thought, use a low pressure switch connected to a light and buzzer. Would get immediate attention.

Any thoughts, experience or other ideas?

Also there appears to be a sensor in the lower left corner of the cylinder head with a single wire. Is this a temp sender and could a gauge be connected?

Re: Gauge or Pee fititng for pontoon

?2) A pee fitting. I had a Merc 35 on a pontoon. They put the fitting in the lower half of the engine cowl using a 45 degree fitting. It created a "rooster tail" easily visible from the helm and didn't interfere with cowl removal.?

Can you adapt a "rooster tail" to the 40 that would easily be seen?


?Also there appears to be a sensor in the lower left corner of the cylinder head with a single wire. Is this a temp sender and could a gauge be connected??

Your wiring diagram should show the color of wire that goes to the temp sensor. Grounding the wire at the sensor sets off my alarm (my horn) with the key on.

Re: Gauge or Pee fititng for pontoon


Another option is get a block temp gauge. This gives you a real time temp of your motor all the time as long as the key is on.

Tom

Re: Gauge or Pee fititng for pontoon

you can get water pressure gauges that max out at 15 psi, and 30 psi.


15's are harder to find, couldn't find one on iboats, but found this one:

Livorsi GIWP15WW Boat Water Pressure Gauge | Great Lakes Skipper


you could rooster tail the telltale


sensor on head is a switch, not a sending unit. it is on/off.

Re: Gauge or Pee fititng for pontoon

wickware- it depends on how strong a stream I can get. i can see the top ofr the cowl from the helm so if it goes above that it would be visible.

While working on the steering I found the warning buzzer under the console.

Sweeperforce - Like the idea of a temp gauge. Water pressure or stream really only tells part of the story. You could be moving water ans still sunning hot. How did you determine what reading was normal?

roscoe- you found a gauge that would match my current gauges pretty well i'd just need to find a really short sender.

Re: Gauge or Pee fititng for pontoon

I asked around in here and everyone agreed on about 130?F.

Re: Gauge or Pee fititng for pontoon

belairbrian said:

wickware- it depends on how strong a stream I can get. i can see the top ofr the cowl from the helm so if it goes above that it would be visible.

While working on the steering I found the warning buzzer under the console.

Sweeperforce - Like the idea of a temp gauge. Water pressure or stream really only tells part of the story. You could be moving water ans still sunning hot. How did you determine what reading was normal?

roscoe- you found a gauge that would match my current gauges pretty well i'd just need to find a really short sender.

Click to expand...

??? sender?

pressure gauge is connected to plastic tubing the runs to the top of the cylinder head.
small plug needs to be removed and replaced with a 90* hose barb.

Re: Gauge or Pee fititng for pontoon

The thermo switch on the block.It should close or make the buzzer work at 160-170.
On the end of the thermostat,there is a number stammped in it.That will be the temp it opens.
To test the buzzer/sender.Key on,ground out the orange lead on the block.It should make the buzzer sound off.
You can add a light to the system.Just make sure it's a low voltage bulb.
If you have a guage?? Does it show anything when your in the water running?
If so don't worry about the poundage,as long as it's indiacating anything!!

Re: Gauge or Pee fititng for pontoon

I'd favor both head temperature and tale tell stream, but not so much with a pressure gauge. And the reason why not a pressure gauge is simply a water pressure gauge is just that...pressure and not flow. So it is easily possible to have water pressure and no flow. There could be any type obstruction in the water cooling system which would still show water pressure but not be flowing properly... So I’d use both a tale tell stream and a head temperature sensor... But that is just me...

Re: Gauge or Pee fititng for pontoon

roscoe said:

??? sender?

pressure gauge is connected to plastic tubing the runs to the top of the cylinder head.
small plug needs to be removed and replaced with a 90* hose barb.

Click to expand...

take a close look at the pictures of the one you linked to. It is all electric and requires a sending unit

Re: Gauge or Pee fititng for pontoon

belairbrian said:

take a close look at the pictures of the one you linked to. It is all electric and requires a sending unit

Click to expand...

sorry, my mistake, I never looked at the photo of the backside.

Re: Gauge or Pee fititng for pontoon

roscoe said:

sorry, my mistake, I never looked at the photo of the backside.

Click to expand...

No problem. Your trying to help.