Adding low water fitting to 2005 XR6 Lower Unit

[Liberator*21]

What is the recommended thread size (NPT) for adding a low water pickup fitting on the suction side of the L/Unit water chamber ?
Thx

[TEXAS20225]

lwp? you mean a cone job?? its 1/2 npt ! years ago when i was doing only lower unit rebuilds and cone jobs now and then i started doing a lot of coning and had much better luck getting the cooling i was needing using two hose's instead of one jm.02

[rgsauger]

lwp? you mean a cone job?? its 1/2 npt ! years ago when i was doing only lower unit rebuilds and cone jobs now and then i started doing a lot of coning and had much better luck getting the cooling i was needing using two hose's instead of one jm.02

One hose on each side really makes a difference, Tex? What did you run for hoses and fittings?

[nitro_rat]

One hose on each side really makes a difference, Tex? What did you run for hoses and fittings?

Yes, and also according to John Marles from his cooling mods article:


Nose cones seem to need two-½ inch hoses from the cone to the pump to really make good flow and pressure.

[TEXAS20225]

i always used Bobs stuff when it was still Bobs i had account with them they had a very good cone in my opinion i used hard copper tube of the ac variety as it was bigger then water copper tube so more water! and then i fiberglassed them in they looked cool;) after i stopped going to all that trouble i used hose and fittings provided by Bob and bought stainless braid for hose cover but i always welded these guys up more then anyone i knew but not solid i liked to pour epoxy in the gap in between housing and cone so no void was left just in case. im not sure how many i did it was quite a few i shipped them all over the US for several years but i quit after i started building more and more motors shucks i could build two motorswhile i was messing with that one gear case:cheers:

[Greg G]

What is the recommended thread size (NPT) for adding a low water pickup fitting on the suction side of the L/Unit water chamber ? Thx

Where did you find a 2005 XR6 lower unit? :smiletest:

[Liberator*21]

Where did you find a 2005 XR6 lower unit? :smiletest:

FaceBook Market Place.

[Liberator*21]

-12 AN Fitting is in. Thanks all.
https://i.imgur.com/PonULrw.jpg

[tnelsmn]

What are you guys doing with the drain fitting on a much older case? About to weld the cone on and not sure what to do with the drain.

[tlwjkw]

-12 AN Fitting is in. Thanks all.
https://i.imgur.com/PonULrw.jpg

jus a question.. where is tha "other end" that feeds tha pump?

[tlwjkw]

What are you guys doing with the drain fitting on a much older case? About to weld the cone on and not sure what to do with the drain.

ya gotta "french" it in with a very short piece (can be long ta start and cut ta fit your body work) of tubing welded and/or epoxied to tha case.....

[Liberator*21]

jus a question.. where is tha "other end" that feeds tha pump?

This is a work in progress project. I've yet to machine up a water pickup for the transom, it will be similar to a Bob's unit except better. I would have gone with a low water pickup nose cone but my 15" mid won't allow it, it would interfere with the clamp/jackplate.

[tlwjkw]

gottcha.. so transom mounted inlet?.. tha "open" holes thru me off a bit..............

[TEXAS20225]

looks like a lot of work on a nonratcheting case :eek: not sure of what the cone will do for you with it setting low enough in the water for the side inlets to work

[Liberator*21]

looks like a lot of work on a nonratcheting case :eek: not sure of what the cone will do for you with it setting low enough in the water for the side inlets to work

Setup yet to be determined, winter project. Lotta work....yes, but I'm retired so time/work is not a factor here, it's all play..........:cheers:

[TEXAS20225]

yes ill say lot of work years ago these were all that i did lower rebuilding and cone work the filling and sanding was my short suit your looks very nice i will say:iagree: was tab welded or epoxied i always welded mine on not saying my ways was better at all, i literally could build two v6 merc powerheads in the time it took me to do a cone job but the experience i got from that end of outboards has helped me many times in the last couple of decades good luck with that set up

[Liberator*21]

yes ill say lot of work years ago these were all that i did lower rebuilding and cone work the filling and sanding was my short suit your looks very nice i will say:iagree: was tab welded or epoxied i always welded mine on not saying my ways was better at all, i literally could build two v6 merc powerheads in the time it took me to do a cone job but the experience i got from that end of outboards has helped me many times in the last couple of decades good luck with that set up

Thank you sir.........:thumbsup: Yeah, it is a bit time consuming for sure but to me the end results are self gratifying.

Tab is welded and I used Marine Tex for blending it in.

[90 5.0]

This is a work in progress project. I've yet to machine up a water pickup for the transom, it will be similar to a Bob's unit except better. I would have gone with a low water pickup nose cone but my 15" mid won't allow it, it would interfere with the clamp/jackplate.

Put a stop bolt in the first hole in the clamp, and slap a 2.5-5^ wedge between the clamp and jackplate to get your tuck back.

or just take the top two bolts out of the jackplate and mark off 5^ and drill new holes and rotate it back.

much better than transom mount pick up bs..
rgsauger

[NZ Sidewinder]

On mine I welded the plug to a piece of 5/8 s/s rod 2 inches long screwed it in then bog/ epoxied around it.
Then cut the rod back flush to the new case profile.
Put the plug in and marked a new slot in the line of the water flow then used a 2mm disc to cut a screw drive slot in the plug.
Then put a blob of tig weld at each end of that slot so the water would gouge at the epoxy at 80mph.
Polish everything flat and true.

[Liberator*21]

Thanks all.....:)

[NZ Sidewinder]

Long radius 5/8 tube bends will likely provide superior flow489864