1977 140 Evinrude question?

x_boat_owner

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Joined
Feb 2, 2002
Messages
7
Hey all, I just got a new boat, my first boat, and we replaced the impeller unit the other day. I took the boat to the lake to see what would happen. (runs like a champ)<br /><br />Here's my question...There are two holes at the back just below the cover in the middle. Water was coming out, but I am wondering how much water should come out? And I've seen some boats that have a steady stream of water come out one side. Is this a blowhole? Sorry my boat terminology is way off.<br /><br />Anyway, does this motor have a so-called "blowhole" or does the water just come out the two nostrils on the back? <br /><br />And if that is the only place for water to come out of this motor, what kind of stream should it be? Spray? Because that's what it looked like...<br /><br />Thanks for any info,<br /><br />x
 

Fouled Plug

Ensign
Joined
Jun 29, 2001
Messages
935
Re: 1977 140 Evinrude question?

Most newer motors have a "tell-tale", the stream of water from the cowl to indicate an operating water pump. Others just emit a spray from the water in the exhaust, like yours. As long as the cylinder head(s) and exhaust plate aren't too hot to touch, you're cooling. You may be able to add a water pressure gauge to your motor for keeping an eye on the flow from the dash. Tell-tales aren't really all that good of an indication, as they can become blocked with debris and lead you to think your pump is shot.
 

x_boat_owner

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Feb 2, 2002
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Re: 1977 140 Evinrude question?

You may be able to add a water pressure gauge to your motor for keeping an eye on the flow from the dash. <br /><br />Can anyone tell me where to find out how to do this? A link maybe? I need pictures...I can't read! :D <br /><br />Thanks Fouled Plug!
 

ebbtide176

Commander
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Jan 22, 2002
Messages
2,289
Re: 1977 140 Evinrude question?

xboat... if you don't want to get into adding a gauge, then i think you should just visit a (diff)marine garage with your question. or maybe just watch other boats at the ramp to get a good idea of what the output looks like, from different motors.
 

ebbtide176

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Jan 22, 2002
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2,289
Re: 1977 140 Evinrude question?

sorry xboat, forgot to mention- get a manual! if this truly bothers you, then why rely on a strangers' advice?<br /> (edited 7/12/02) <br /><br />ok, i've been more careful lately...
 

x_boat_owner

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Feb 2, 2002
Messages
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Re: 1977 140 Evinrude question?

I'm trying to avoid the mechanic as much as possible, not that they are bad, I just want to use them for the problems I can't fix myself, like propeller hub slippage...
 

x_boat_owner

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Joined
Feb 2, 2002
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Re: 1977 140 Evinrude question?

Hey ebbtide, why don't you take a short walk...and don't even bother responding to my questions if you are going to be rude. This may be my fist boat, but I have been boating for many years. And can say that I am in the top percentile in responsibility.<br /> <br />I plan on getting a manual but I highly doubt it will answer my question regarding how much water will spray out the "tell-tale"! <br /><br />And your suggestion of looking at other boats to see the "output of water" is just plain ridiculous. You see there are such things as different models!<br /><br />I want to know exactly when you became the sole cartaker of our environment...<br /><br />How 'bout a nice big cup of STFU!
 

Fouled Plug

Ensign
Joined
Jun 29, 2001
Messages
935
Re: 1977 140 Evinrude question?

x_boat, ebbtide may have been a bit abrupt suggesting you lacked a basic understanding of your boat, even though you said you had done an impeller change yourself. And it was rude to suggest you not post here for help. As if the "online/realtime community" was elevated far above mere mortals. :D I, for one, am quite happy to provide what help I can willingly. It may not be gold-plated factory backed perfection, but it's free! This may be your first boat, but I hope this forum won't be the last place you look for advice.
 

Digdug

Petty Officer 3rd Class
Joined
Jan 23, 2002
Messages
77
Re: 1977 140 Evinrude question?

Hey X-boat, I have both a "tell tale" and a water pressure guage. I constantly monitor them anytime I am running the engine. It sure makes me feel better to be able to monitor water pressure. It would be easy to install and it might save your powerhead one day. I could not imagine not having them. Good Luck!
 

Digdug

Petty Officer 3rd Class
Joined
Jan 23, 2002
Messages
77
Re: 1977 140 Evinrude question?

X-boat, make sure your engine does not have a "tell tale" that is plugged up. I previously owned a Johnson V-4 115hp and it did have a "tell tale".
 

Digdug

Petty Officer 3rd Class
Joined
Jan 23, 2002
Messages
77
Re: 1977 140 Evinrude question?

In reference to my above note. It was a 1978 or 1979 V-4 115hp Johnson....Sorry
 

masondr

Seaman
Joined
Nov 29, 2001
Messages
50
Re: 1977 140 Evinrude question?

I could be wrong on this, since I am not an expert. It sounds like the two holes you are talking about are what was described to me as exhaust pressure relief holes, to minimize back pressure load on the starter during cranking.these are above the water, while the main exhaust discharge is underwater. Some water will spit/spray out of these, but apparently is highly variable, and not a good indicator of coolant flow . As others have said, you should also have a telltale/blowhole,etc on the rear side of the cowling. This is a better indicator of cooling, but can become easily plugged. A pressure gage and/or a head temperature gage is the ultimate way to go, if you want max piece of mind.
 

csmithrc

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Joined
May 8, 2001
Messages
27
Re: 1977 140 Evinrude question?

I own that same engine as you X_ Boat.Those holes you refer to are pretty much what dave said.They do spit out water most of the time.As far as hooking up a pressure gauge this engine does not have a so called tell-tell hose. You will have to drill and tap into the rear exhaust bubble like i did or into the cylinder wall(which i was not gonna do).The pressure gauge works great and lets you know right away if there is a problem.I also put a temperature gauge on the cylinder head.Good luck :)
 
D

DJ

Guest
Re: 1977 140 Evinrude question?

x_boat,<br /><br />You don't have a telltale on that engine. You can hook up the pressure guage as described in the last post. I believe there was a thread on that very subject awhile back. Try a search and you'll find it.<br /><br />Regarding the two holes you described. They are indeed exhaust backpressure reliefs. At idle, you'll have a spray coming out of them.<br /><br />At planing speeds, you will have a stream of water coming out that should be 2" to 3". Of course you can't see this while you're driving. If you can have someone sit near the back of the boat, they MAY able to see this as you are cruising.<br /><br />Welcome aboard!
 

x_boat_owner

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Joined
Feb 2, 2002
Messages
7
Re: 1977 140 Evinrude question?

Thank you for all your help and guidance! :) <br /><br />I'm sure I will have many years of enjoyment with this boat!<br /><br />OK, I found this article from last year...<br /><br />link<br /><br />...csmithrc, are these pressure gauges easy to find at the local shop, or is it better to find somewhere online?<br /><br />Thanks!
 

csmithrc

Cadet
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May 8, 2001
Messages
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Re: 1977 140 Evinrude question?

I have ordered several things from the shad connection and have been very pleased.
 
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