water out of through hall exhaust

[TheToad]

first info on the problem. pachanga 22, 454 gen4, florida marine headers and exhaust. i just built this motor and ran it on land to set timing and such. when i put it in the water i am only getting water exhaust out of one side at idle, i get water exhaust when i pull rpms but it dosent seem to be as much. any idea what would or could cause this?

i included a picture of my boat.

 

[legoman67]

Re: water out of through hall exhaust

how is it plumbed? some have a Y pipe and equal split of water, some have the water to into one riser and then from that riser to the other.

The second design, by design will have more water flow out of one riser then the other, but you should still get water out of both at idle. If you dont either your pump impeller is shot, or your pump is not sufficient for your setup. or its possible theres a kink in the line somewhere....

 

[bruceb58]

Re: water out of through hall exhaust

What temps are your risers running at?

 

[Bondo]

Re: water out of through hall exhaust

and ran it on land to set timing and such.

Ayuh,... You were feeding the impeller with water during this time, Right,..??
How long ago was the impeller last changed,..??

 

[TheToad]

Re: water out of through hall exhaust

how is it plumbed? some have a Y pipe and equal split of water, some have the water to into one riser and then from that riser to the other.

The second design, by design will have more water flow out of one riser then the other, but you should still get water out of both at idle. If you dont either your pump impeller is shot, or your pump is not sufficient for your setup. or its possible theres a kink in the line somewhere....

its set up with a Y housing. impeller was just changed thought that might have been in issue so we knocked that out right off the get go.

 

[TheToad]

Re: water out of through hall exhaust

What temps are your risers running at?

i running 150-160 on the temp gauge.

 

[legoman67]

Re: water out of through hall exhaust

since i dont know your location i have to ask, does the boat run on salt water? if so how long ago did you last replace the risers?

 

[TheToad]

Re: water out of through hall exhaust

fresh water never seen salt.

 

[bruceb58]

Re: water out of through hall exhaust

i running 150-160 on the temp gauge.

You need an IR gun and measure the risers directly. Are either hot to the touch at idle?

 

[Philster]

Re: water out of through hall exhaust

Do you have a t-stat in place? If so, what temp?

 

[TheToad]

Re: water out of through hall exhaust

You need an IR gun and measure the risers directly. Are either hot to the touch at idle?[/QUOT]

at idle they are i warm never hot i can always touch them at idle.

 

[TheToad]

Re: water out of through hall exhaust

Do you have a t-stat in place? If so, what temp?

yes i do 160 temp.

 

[bruceb58]

Re: water out of through hall exhaust

at idle they are i warm never hot i can always touch them at idle.

Then you are more than likely fine.

 

[TheToad]

Re: water out of through hall exhaust

well thats the case it runs o.k i'm just worried about the uneven water flow. alot of people question it but have no idea why it does it.

 

[nofuss]

Re: water out of through hall exhaust

just a little hint, with boats if something looks wrong something probably is, more likely than not. Check the hose that carries the water to each riser, You may even have to take it off, start the engine briefly and see if water flows through each easily. messy but easy check. if the same amount of water comes out each side, then there is some blockage in the riser. if not there is something amiss before this point.
trouble shoot it this way and ensure that u check everything, dont just assume that all is well and end up shut down or limping home with expensive damage that could have been avoided by a couple hours of checks.
if there is an equal Y then the water flow should be about equal, unless there is some reason for a difference. ensure the reason is design and not blockage.

 

[TheToad]

Re: water out of through hall exhaust

http://www.stainlessmarine.com/inde...category_id=36&option=com_virtuemart&Itemid=1

this is what i have in it. except its not exactly the same but i didnt see the pics of the same one i bought. its a Y at the terma 1 water line in and 1 out. but by the pic you should get the idea.

 

[TheToad]

Re: water out of through hall exhaust

this is mine without risers

 

[bruceb58]

Re: water out of through hall exhaust

It is very normal to have more water going out one side than the other...especially at idle.