200 Mariner

[Bigshrimpin]

Joe there should have been a little plastic tube guide included with that kit. It helps line up the top of the water pump . . . so that the copper tube can slide into the correct place and seat into the rubber grommet. You need two people to do this job or a ratcheting tie down to hold the lower into place.

[jobu]

So the rubber grommit goes in the housing then the plastic guide goes into that(tightly) and when you slide in the unit the copper pipe(already attached to the upper drive housing)slides into the plastic guide pipe and eventually into the rubber grommit and housing?
Thants how i thought it worked...but must not have gone right...is that right? also I did get a new white pipe but didn't see new rubber grommit?
thanx Bigshrimpin...Im still up
joe

[nos3665]

I have seen Great instructions here, Just a question tho, as you bolted the water pump housing to the LU did you rotate the shaft so the impeller is free?

[Blue_Heron]

...Now I get NO water out of all three...I assume that I didn't line up the water pipe correctly...I try it again and get no water still. Is there a trick to lining up the guide for the copper pipe? Does the pipe attach first to the upper part or to the pump housing first...also if anyone can explain the order this would be great. Also I cant see it but it looked like I got it lined up right so maybe something completely different. If anyone can help it would be greatly appreciated.
Thanks Joe

A few thoughts:

The new water pump housing probably already has the rubber bushing installed, so all you need to do is place the alignment tube and the pipe will seat properly.

Also, did you turn the drive shaft clockwise (looking down from the top) when you seated the impeller in the housing? If you turned counter clockwise, it may not pump.

And did you remember to place the key on the flat spot in the driveshaft before dropping the impeller down the shaft? Without the key, the impeller ain't going to turn.

And I reiterate my recommendation to pick up a Merc shop manual. All things are clear when you've got the book.

Good Luck,
Dave

[jobu]

After the third try,I eventually got everything right with the key and the pipe inlet. Also the impeller was in right and shaft turned clockwise. Now I'm getting water...not steady though. Screw it, it's sunny I'm going in. I dropped her in Plymouth harbor and ran it around at idlw to 1000rpm and it seemed fine. As soon as I got into the channel and got up to about 3000rpm...beeeeeep! the alarm went off.
I later pulled and dropped her off at the boat yard. The mechanic said it looked like the pipe was not seated correctly at the top end . They had it running in a barrel and seemed to be pumping better but still intermittant at idle but pretty steady at 2000-2500. With my hand on the head at 2500 it was actually cool...but when we idled it for a while it got up to 135'F then it looked like the thermos would open and would drop to 119'F.
Not totally convinced but she's going in as soon as it stops raining. Maybe tomorrow or Thurday.
Fingers are crossed and a report will follow.
Any more ideas welcome....the only thing I can think is that there is something floating around in one of the lines???
Thanks for the all support,
Joe

[Bigshrimpin]

It sounds like it's running perfectly. Those blackmax motors run hot compared to others and what you describe is "normal" based upon my experience with them. I love those motors.

[Blue197320]

I love those motors.

and it shows.
i need a collection of motor parts like that.

[jobu]

I feel better knowing that someone who has expirience thinks she's running normal.
I just wish I was getting a more steady stream out of the top telltale. Warm at idle and cool under revs is where I am now and hopefully that's it cause she's going back in on Friday...fingers crossed.
Thanks for the help and advice.
Joe

[Bigshrimpin]

Joe - I've run my motor with snipped tstats (washers) and that'll give you the steady pee stream you're looking for . . . problem is that your motor will run cold. If you are north of the cape, you want to run with tstats in b/c your plugs will have a tendency to foul quickly.

[jobu]

Well, ran it yesterday and it is still spitting intermittantly...but not overheating. But when I ran it up it was rough early then would get over 4800 rpm. Changed fuel filter and water seperator and still topped at 48-4900 rpm not 5600 as it usually does. I talked to the mechanic and he seemed to think it might have a blown head gasket or O ring. He thinks its blowing air exhaust into the water jackets which is causing the pulse. There was also alot of water coming out of the upper exhaust below the upper tell tale. It looks like something I could handle myself so I will give it a shot on tuesday or at least open it up and see. I remember the last day I had it out last year...I was wailing on it with a three man tube and it wasn't running all that good then. He happened to have a similer motor apart and the heads look somewhat accessable.
Does any of this sound like it might make sense?
I have literally gone through the entire cooling system at this point and it all looks normal. Starting to really lose patience.
Joe