steaming exhaust port

[bigbassbrent]

Have a 175 evinrude that will blow steam out of the exhaust port (just below the engine cover on the prop side of the motor) while the engine is at low rpms but not at hi rpms. The engine pees runs and starts fine at all rpms. Is it normal for steam to blow out of this port at low rpms???Could it be some water that is leeking onto the engine and being blown out that port??? It is definitely being blown (puff puff puff puff puff) out of the port and not just "leaking" out of the port. <br /><br />Thanks<br />Brent

 

[sikpnter]

Re: steaming exhaust port

Hey bigbass when ever your crusing along then slow down that wave of water that slaps the back of your boat is probably putting some h2o in your exhaust port this is normal wont hurt a thing the steam is the water leaving in a different form. Check your plugs for piece of mind and see if any look clean like steam cleaned if not your fine.

 

[OBJ]

Re: steaming exhaust port

It could also mean your impeller needs a change out. If the impeller has lost it's memory, it will not pump well at low rpms but pump fairly good at high rpms. When was the last time the impeller has been changed out Brent?

 

[DJ]

Re: steaming exhaust port

Ditto, OBJ.

 

[Dhadley]

Re: steaming exhaust port

Just curious -- which 175 are we talking about? The 2.5 crossflow? 2.6 crossflow? Looper?

 

[walleyehed]

Re: steaming exhaust port

Hey DH, I was going to add something on this, but I didn't know the 2.6 well enough to guess on it...But, my 2.5 does this same thing..steams a bit, usually after a good run, but Cyl. hd temps are down, and W.P. gauge says around 3-4psi at Idle, so "I" figured this to be normal in the 2.5, but didn't know enough to open my mouth...I'll be listening for the outcome.

 

[OBJ]

Re: steaming exhaust port

Bump ^

 

[bigwave]

Re: steaming exhaust port

Originally posted by sikpnter:<br /> Hey bigbass when ever your crusing along then slow down that wave of water that slaps the back of your boat is probably putting some h2o in your exhaust port this is normal wont hurt a thing the steam is the water leaving in a different form. Check your plugs for piece of mind and see if any look clean like steam cleaned if not your fine.

I checked the plugs. The bronze colored metal (the threaded end) on 2 of them is pretty shiny, but the spot where the spark jumps the gap is not shiny on any of the plugs. Would the metal on either side on the spark gap be shiny if they were "steam cleaned"??? Thanks

 

[bigwave]

Re: steaming exhaust port

Originally posted by Dhadley:<br /> Just curious -- which 175 are we talking about? The 2.5 crossflow? 2.6 crossflow? Looper?

The motor is a looper I think since it says Loop Charged on the front of the motor (air cleaner cover I think) as far as a 2.5 or 2.6 I'm not sure. The serial # is 175GLENC if that helps

 

[bigwave]

Re: steaming exhaust port

Originally posted by walleyehed:<br /> Hey DH, I was going to add something on this, but I didn't know the 2.6 well enough to guess on it...But, my 2.5 does this same thing..steams a bit, usually after a good run, but Cyl. hd temps are down, and W.P. gauge says around 3-4psi at Idle, so "I" figured this to be normal in the 2.5, but didn't know enough to open my mouth...I'll be listening for the outcome.

My motor is a "looper" and at idle the psi is also 3-4. Goes up as the revs go up. I read that someone thought it was good to see this steam since it means the thermostat opened up??? But this could be a bad interpretation on my part. I hope you have had your motor for quite some time and that it has steamed for the whole time you have had it. Reassures me even more like it is normal.

 

[Dhadley]

Re: steaming exhaust port

Bigwave, thats a 1992 60* looper, 2.6 liter. Cool motor. A lot depends on water and air temps. Its probably OK but you might think about a water pump if its been a couple of years or so.<br /><br />Kenny, the 2.5 & 2.6 crossflows are so much alike that whatever you see with your 2.5 will be pretty much the same with the 2.6. Basically the same motor as yours with tuned exhaust and a bigger bore. (To answer your next question -- no, it wont work. Unlike the V4.)

 

[bigwave]

Re: steaming exhaust port

Originally posted by Dhadley:<br /> Bigwave, thats a 1992 60* looper, 2.6 liter. Cool motor. A lot depends on water and air temps. Its probably OK but you might think about a water pump if its been a couple of years or so.<br /><br />Kenny, the 2.5 & 2.6 crossflows are so much alike that whatever you see with your 2.5 will be pretty much the same with the 2.6. Basically the same motor as yours with tuned exhaust and a bigger bore. (To answer your next question -- no, it wont work. Unlike the V4.)

 

[bigwave]

Re: steaming exhaust port

Could you please let me know what the 60* and looper stand for? Good to here it is a cool motor. Does cool also mean dependable and long lasting? Thanks

 

[walleyehed]

Re: steaming exhaust port

By Dhadley...<br />

(To answer your next question -- no, it wont work. Unlike the V4.)

How did you know what I was thinking...??? <br /><br />Bigwave, the 60* means 60 degree cylinder configuration...port to starboard is 60 degrees.<br />This design is likely one of the best made...wish I had a 60* V6 Looper...

 

[bigwave]

Re: steaming exhaust port

Thanks walleyehed and dhadley!<br />You make me feel like I just bought a "HEMI".

 

[Cricket Too]

Re: steaming exhaust port

bigwave...Looper means it's Loop charged and scavenged as opposed to Crossflow charged and scavenged, just a different way of the cylinder bringing in the new fuel/oil charge and scavenging the exhaust out.

 

[bigwave]

Re: steaming exhaust port

Thanks for the help guys! Took the boat out today and ran her pretty hard. She ran like a champ and didn't steam at all. (Although I saw a yamaha go by at full speed and man was that motor steaming!!! Go figure) Guess the head is still in good shape.