rebuilt powerhead no telltale fitting

[h_lankford]

engine: 1986 Johnson 60hp 3.00" bore, 3 cyl (J60TLCDS)<br /><br />problem: received rebuilt powerhead from a gulf coast suppler. The exhaust chest does not have a fitting to attach the telltale hose. There is just blank metal there.<br /><br />Can I safely drill out and tap one in in the exact same location as the original?<br /><br />Do I live without it? someone suggested that maybe this rebuild manufacturer provided a different model that just did not have a fitting. Huh? Is there such a thing? Otherwise everything looks the same. <br /><br />By the way - apparently some of 1980's confusers have the exhaust enter the exhaust adaptor in the middle or at the side. Mine is the one that enters at the side. <br /><br />Thanks very much for your advice.

 

[rodbolt]

Re: rebuilt powerhead no telltale fitting

look on the top of the block beside the top of the exhasust cover. if its a lost foam block it may have the tell tale from the top of the block, if not thats where you drill and tap the new fitting, there is a tech bulliten on the relocation procedure.

 

[bubbakat]

Re: rebuilt powerhead no telltale fitting

This might be of some help.<br /><br />

 

[h_lankford]

Re: rebuilt powerhead no telltale fitting

Thanks, guys. Will take a look this weekend. I should be fine with this great advice. Harvey

 

[h_lankford]

Re: rebuilt powerhead no telltale fitting

Bubbakat, <br /><br />I cannot understand figure 2. Both my J60TLCDS and my replacement powerhead do not look like that. It even looks in figure 2 like they have the head at a 90 degree angle from what is it relative to the exhaust housing. Huh? Also, it is confusing when they say "relocate the water pump indicator outlet tee to the top of the cylinder block" when I think they really meant to say to move it to the top of the exhaust chest as shown in figure 2. But the devil is in the details! Please help me interpret what to do.<br /><br />Here is a picture of my rebuilt unit and the exhaust cover or chest.<br /><br />For better visualization, I placed white strips on the three gaskets. Note that the gaskets are all parallel and appear different than the poorly shown details on figure 2)<br /><br />Arrows 1 through 4 are at various points discussed below:<br /><br />Arrow 1 points to the very end of the "ear". I do not think this is what they mean by "rear corner." I think they really mean at arrow 2. So if I go forward 2 inches from arrow 2, then inwards toward the middle 1 3/8 inches, then I will be at arrow 3. Does this look correct? I don't think they meant to go all the way over to the block itself (arrow 4).<br /><br />How critical is the location around arrow 3? If I am off by a half inch, does it matter? Is there a large water passage all over this area, or am I trying to hit a half inch wide passageway?<br /><br />Whew! Thanks for your advice. Harvey<br /><br />

 

[rodbolt]

Re: rebuilt powerhead no telltale fitting

are you sure its an 86 model powerhead and exhaust ?

 

[h_lankford]

Re: rebuilt powerhead no telltale fitting

Thanks for thinking with me about this, rodbolt<br /><br />The original engine serial is J7120235<br /><br />The J60TLCDS is a 1986 but I think this refers to the electronics. The engine itself might be a 1985 or earlier. Here is why:<br /><br />There are two types of exhaust routes down the leg for 1980s models. My original powerhead and the rebuilt replacement both have the exhaust passage enter the exhaust adaptor at the side rather than in the center. <br /> <br />So if I really do have a 1985, then the service bulletin does not apply. So what then do I do? Just have no tell tale at all?<br /><br />Thanks

 

[rodbolt]

Re: rebuilt powerhead no telltale fitting

even if you have the older style you can add a tell tale. where in VA are you ?<br />but that cover looks like a mid seventies model that had no tell tale.<br />all the late 70's and the 80's 3 cyl motors I played with and worked on had the telltale port in the lower part of the cover. I have moved them for 15 years due to air in the top of the block, same as the early 3 cyl mercs. let me hunt outback as I have a few covers about

 

[h_lankford]

Re: rebuilt powerhead no telltale fitting

I am in Richmond, boat is stored off Piankatank River near Chesapeake Bay.<br /><br />So even if it is an older model cover, or an older model complete powerhead, then I can still tap in a tee at the top? Thanks for checking.

 

[rodbolt]

Re: rebuilt powerhead no telltale fitting

yes but I cant remember exactly where out of memory. but I am pretty sure its a pre77 cover, if its a pre77 block and designed for the two piece intake the one piece will bolt up but it wont idle right, been there done that.

 

[h_lankford]

Re: rebuilt powerhead no telltale fitting

I should mention that the exhaust cover on my original engine (purchased new in 1986) and the 1977?/ replacement powerhead (picture shown) are identical in appearance! They both look like two piece to me.

 

[rodbolt]

Re: rebuilt powerhead no telltale fitting

in the seventies some of the INTAKE manifolds were 2 piece, by the 80's I believe they were all one piece. the two wont interchange, we tried it twice with poor results.

 

[rodbolt]

Re: rebuilt powerhead no telltale fitting

I just did some looking seems the 80 and ealier had a two piece intake and the outer exhaust cover did not have a water fitting till about 83. google BRP parts.

 

[h_lankford]

Re: rebuilt powerhead no telltale fitting

so, the INTAKE is a sidebar topic at the moment.<br /><br /><br />To summarize our conclusions:<br /><br />my original (1986) EXHAUST cover had a low tee <br /><br />my replacement (<1983) EXHAUST cover had no tee at all<br /><br />the Service Bulletin quoted above for installing a high tee is for 60 hp 1989-1994. Are these dates truly all there is?<br /><br />Rodbolt, maybe some of yours outback may have a story to tell about the location for the high tee.

 

[rodbolt]

Re: rebuilt powerhead no telltale fitting

thats why I said wait<br /> that way I can look and see where the where passage is. we just drilled te top of the block on the old 60's and 70's models. ya just have to pick a spot with enough clearence for the tap and the fitting and be upstream of the t-stat and pressure valve assy.

 

[KilroyJC]

Re: rebuilt powerhead no telltale fitting

Hi all<br />just posting to follow this thread - I need to do this to my '75 Evinrude 70HP.<br /><br />This should work, correct?<br /><br />Thanks,<br />Matt M

 

[MCM]

Re: rebuilt powerhead no telltale fitting

Harvey, I'm not sure if this will help you but this diagram click here, for an '83 60hp seems to show a location for an elbow indictor and hose on the bottom prtion of the exhaust cover

 

[jtexas]

Re: rebuilt powerhead no telltale fitting

Thanks for the image, bubbakat, I've heard about that SB but never saw it before now.<br /><br />1979 rude 70, model 70973 telltale fitting at the bottom of the exhaust cover just like the SB Figure 1 above, but it's an "elbow" not a "tee".<br /><br />But the '79 isn't covered in the SB - is there something about the earlier models that makes trapped air not an issue? <br /><br />just to be perfectly clear: is this the place:<br />

<br /><br />thanks!

 

[h_lankford]

Re: rebuilt powerhead no telltale fitting

MCM, thanks for the link, but that engine is 2 cylinders, mine is 3, and the exhaust chest has fewer pieces than mine. However, the indicator tee does looks like a very similar location as the one on my original engine. (Actually jtexas is correct, it is an elbow not a tee.) <br /><br />It is my replacement powerhead that needs help as it has no fitting anywhere. <br /><br />The picture I took several threads above has arrow 3 pointing to what looks the right place to drill on the TOP of the exhaust. jtexas has the same conclusion in his diagram directly above. <br /><br />we are appreciating rodbolts efforts to clear this up by looking at an actual old hunk lying about. He can then verify exactly where we drill so we will hit a coolant passage. A 1/4 inch difference here and there may be critical.

 

[rodbolt]

Re: rebuilt powerhead no telltale fitting

I will have it in a few. soon as I eat a bit