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Molded bypass hose from recirc pump. Source?

This seems like it would be a common problem but a search didn’t pop up any immediate info.

My new airgap intake is much taller taller than the stock unit so that little hose is too short. Anyone know where to get 3/4” hose with a 90* bend?

your local auto parts will have the same thing, cut to fit

The one I got at O'rileys was long enough, in fact it needed trimming. The real problem I had was the hoses from the thermostat housing to 1) recirculating pump 2) to oil cooler. I ended up getting double barbed straight S/S fittings for both and trimming 2 hoses for each to avoid kinking at bends.
Good luck.

I don't use one. Most t-stat housings do the same thing. IE: have a bypass within them

So....what do you have for a t-stat housing ?

Quote:

Originally Posted by F-2 Speedy (Post 4648383)

your local auto parts will have the same thing, cut to fit

Have you been to my local auto parts store?

https://cimg2.ibsrv.net/gimg/www.off...d23504502.jpeg

Quote:

Originally Posted by SB (Post 4648441)

I don't use one. Most t-stat housings do the same thing. IE: have a bypass within them

So....what do you have for a t-stat housing ?

stock Merc MPI thingy. Four ports; big recirc pump, header hoses, freshwater intake.

My local Vato zone just points me in the general direction and lets me go find it.....lol

Quote:

Originally Posted by Baja Rooster (Post 4648451)

stock Merc MPI thingy. Four ports; big recirc pump, header hoses, freshwater intake.

If it's the tpical housing in diagram below:
That housing recirculates water back down to the inlet of the recirc pump (amogst other thigs) so that bypass hose is not needed.
If the pipe is threaded in the recirc pump, unthread it and put in a brass pipe plug. :)

https://www.mercruiserparts.com/Merc...MMON/39675.gif

Quote:

Originally Posted by SB (Post 4648480)

Thats the critter! I noticed two ports in the housing feeding the thermostat so that makes sense. I just have to remember to install the thermostat the right side up :p. Thanks.

Quote:

Originally Posted by Baja Rooster (Post 4648483)

I just have to remember to install the thermostat the right side up :p. Thanks.

and on top of the t-stat spacer, not under it. And orientate that spacer correctly. :)

I wrote this some time ago about this housing. Good explanation that would take too long to type again, so I am quoting it.

Quote:

Originally Posted by SB (Post 4600931)

1 large in/ 1 large to recirc pump, 1 x 2 outs to exhaust ports

Think of the Tstat housing in 2 halfs.

Water enters the lower and goes to recirculating pump. When the lower half fills it then is able to enter the upper half thru a 'bypass' opening. The upper half is what has the 2 outlets to the exhaust manifolds. This way, the water entering from the sea water pump is prioritized to the recirculating pump. Again, The excess goes up thru the bypass opening into second half which send it to the exhaust.

The t-stat rests/seals against upper 2nd half. Directly over , but not on, the t-stat opening in the intake manifold. When the t-stat is closed a lot of this water get's redirected with incoming water towards the recirculating pump. When the t-stat opens, the hot ater coming from the intake manifold has a straight shot to upper t-stat housing half which goes right out into the exhaust manifolds.

The 4 port Mercruiser t-stat housing is actually, in my mind a stroke of genius. It does not impeded water flow, let's the thermostat do it's ob quite well,and it actually directs water to where it needs to be prioritized. all while letting lots of water thru to the exhaust and out the boat.