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Where do I connect my heater lines? 98 SN - GT40

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man0seven View Drop Down
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    Posted: April-25-2019 at 1:41am
Hey everybody,
I need help in figuring out the best place to connect my heater hot water line and the return line. Can someone tell me or better yet, upload pictures? 
I know that the low idle wye is supposed to be the best way but where do I put it?
Thanks in advance.
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Gary S View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Gary S Quote  Post ReplyReply Direct Link To This Post Posted: April-25-2019 at 2:27am
The Y goes into the raw water intake hose,I put mine in about a foot before the raw water pump just because it was convenient. The other hose goes into a T that is in the intake manifold port near toward approx 4-5 o'clock of the distributor. Right now there is a temperature sender in it that's why you need the T,the sender has to go back in too. When I first got the boat it did not have the Y,that heater hose was threaded into the drain of that U between the circulation pump and the lower thermostat housing. At idle there was zero heat. That Y made all the difference. If no one beats me to it I'll try to find a picture of the manifold T in my 40 tommorow
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Post Options Post Options   Thanks (1) Thanks(1)   Quote gun-driver Quote  Post ReplyReply Direct Link To This Post Posted: April-25-2019 at 9:26am
It’s a little hard to see but the Tee is just left of the distributor, that is out “to” the heater. The "Y" fitting "OUT" from the heater I put like Gary said below and just left of the crank pulley. Remember that is the return line so make sure the "Y" is oriented the correct way.

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man0seven View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote man0seven Quote  Post ReplyReply Direct Link To This Post Posted: April-25-2019 at 2:01pm
This is very helpful. Thank you both.
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Gary S View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Gary S Quote  Post ReplyReply Direct Link To This Post Posted: April-25-2019 at 6:10pm
I think you guy's engines are in the boat backwards.....

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Post Options Post Options   Thanks (1) Thanks(1)   Quote gun-driver Quote  Post ReplyReply Direct Link To This Post Posted: April-25-2019 at 6:32pm
nope that's you as$ pushers that are backwards
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