2008 210 heater install

[Nordicron]

Az I didn't put a Y in just the circ pump.


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[scottb7]

Would be nice and appreciated if I can get some pointers. I am thinking of wiring the circulation pump and not doing the low idle y. If you have good luck from low idle y please speak up....

electricians help please? i get that i as stated in the pic go from battery (battery switch right, really?) to 30. And I also think I get that then 87 goes to pump positive and then pump negative to ground. Got it.

But now the question is 85 and 86....85 goes to ground. got that. Is it possible to use one relay if I still want to use all 3 speeds? The heater would be hooked up just like the picture, but then when you use the relay you would go from point 1, 2, or 3 to point 86, right? Can I wire all 3 points (1, 2, 3 to point 86 on the relay or with something fry?) Or need 3 relays?

Or should I just plan on using high only anyways? With circulation pump will i need all 3 settings or will i still be using on high anyways?

http://www.amazon.com/Flojet-Triplex.../dp/B002P33KVQ Can i use this pump? Probably not right? This one says 1/2 fittings and lines that come with kit from nautique parts are 5/8 right?

help... either post back or if easier, just pm me and i can give you my cell to explain it to me.

[Nordicron]

Scott I think u have the relay figured out all right. Again I used 3 relays because I wasn't sure how to isolate the 3 different fan speeds. U will basically be wiring a fan speed(high,med or low) to 86 and the positive of the pump to 87. But I don't see how u can wire all three speeds to 86? To me that would not work as it would likely screw up something. Just use 3 relays one for each fan speed. Everything else can be tied together.


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[aZ`]

I took mine out for a run for the first time since heater install on Friday and cannot tell the difference in outlet temp from idle to running speeds so I believe the Y is quite effective. The problem I have is I can't get engine temp over 140f. Water was 59f. Wakeboarding speeds with 2500lb on board so the engine was working.


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[scottb7]

Found this on another forum....

[scottb7]

I just completed and went for water test. I also felt like with the low idle wye the heat was same at idle and cruising at 20 mph. Overall feel good about the project. Probably hardest 2 parts are hanging the heater just because you have to hold it up and screw it in at same time. And running air hose down side of boat.

Thanks to everyone.

[aZ`]

Good news mate! Did you have a look at the engine temp? Did it run any cooler than usual?


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[scottb7]

I did indeed look at the engine temp. It was the same as day before.

It is interesting that whether you use the heater or not, the hot water from manifold does not increase the engine temperature. You would think feeding a bit of hotter water into the circulation pump would increase the engine temp. I am curious why it does not.

I actually monted it with the fan side up. So the hoses come across the gas tank up under the helm and just curve across and hook on top right. No kinks. Then the air hoses go straight down without having to curve down from the top.

[aZ`]

The heater can aid cooling as it acts just like a radiator. Hot water comes from the engine, heat is transferred to the air in the exchanger and then the not as hot water is returned to the engine. The only time this could cause a run hot scenario is if the water pump was under performing.


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[scottb7]

I agree but what if you don't have the fan on, then you aren't taking any heat out of the water. Plus, when you use the y then you are routing the hot intake manifold water into the motor, when you normally would be 100% lake water going into the motor....Seems like on balance the water going in to the motor when using the y would be hotter, wouldn't it?

Also, wondering if there was any point in putting in one or two shutoff's in the line so that there is not hot water in the core during summer when not in use???? Can't be too critical because the factory does not put in shut off's, do they?

[ddipert]

Heater exchanger does not produce heat so there is no more heat in the system with or without the heater.
The engine puts out X BTUs if they don't get dissipated From the heater core (core isn't large enough so it would not) Then the rest of the BTUs will get put back in the lake. If you don't turn on the fan then it's a very poor heat exchanger, all of the BTUs will be put back in the lake just like it would be without the heat exchanger.

Could add shutoff valves but your heater in your car does not use them, nautique don't use them. Only reason I would see shutoff vales being useful is if you had a leaking heater core. Or if you were running raw water through the heater core in a salt water environment but didn't want salt running through the heater core.