Help With Fixtures on a Stern

[icarusisaacs]

Can anyone tell me what the two items circled in the pics are for? They're on a recently purchased 1988 Glassport 190 RX/CC and I can't find any info on their purpose. They may be something common but I'm fairly new to boating. My only other boat was a 1973 Thunderhawk Thunderchief TriHull and it wasn't equipped with these things. The boat's in overall good shape other than the common 3.7L Mercruiser blown head gasket issue, which I have the gasket set from Sierra Marine to go on and I'm propbably going to have to replace the tilt limiter and sending units on the outdrive as the trim gauge doesn't work and the outdrive only trims up with the trailer button. May get away with an internal cleaning of the switches on that, hopefully. And other than a few wiring issues I see no reason I can't be enjoying this thing for years to come.

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[GA_Boater]

Try the pics again. They aren't showing.

 

[icarusisaacs]

Try the pics again. They aren't showing.

I tried but I get this error:


boat.jpg
Upload failed due to your usergroup's upload quota. This file will require 281.0 KB but you only have 165.7 KB of 976.6 KB remaining.

 

[icarusisaacs]

They show on my screen. Maybe if I upload them to my userfiles...?
I'll try that anyway.

 

[icarusisaacs]

Okay so I uploaded them to an "ideabook" and now they aren't showing in that book. Only the spinning "Thinking" orbs. I'll try to sort it out. FWIW I also asked in this thread: https://forums.iboats.com/forum/gen...-and-topics/399779-prop-help-for-88-glassport In that guys pics the one thing is visible to the right of the outdrive. It looks sort of like a locking cam drain plug, but it has a tube or wire attached to it and it doesn't actually lock in the down position. Also on mine, just above this, is a chrome piece with what looks like a different tube / wire going directly through it at a 90 deg angle through the hull.

 

[icarusisaacs]

OK if you click where it says "FLICKR" below this text it should take you to the pics. I hope. IDK why my pics won't show...

 

[icarusisaacs]

I'll try one more time...

 

[JASinIL2006]

I see ‘em!

Not sure about the fittings. At first, I thought they might be the remnants of trim tabs, but upon looking at them more closely, I wonder if they are the pickup for a pitot speedometer tube (except the tube is severed) and the fitting where the tube should enter the boat?

 

[icarusisaacs]

I see ‘em!

Not sure about the fittings. At first, I thought they might be the remnants of trim tabs, but upon looking at them more closely, I wonder if they are the pickup for a pitot speedometer tube (except the tube is severed) and the fitting where the tube should enter the boat?

My man! I believe you are absolutely correct. Thank you, sir!

 

[Scott Danforth]

that is a pitot tube pickup, a broken pitot tube and the thru-hull clam-shell for the pitot tube

my guess, the speedo isnt working.

easy fix, complete kit with new pickup and 25 feet of hose is about $25

 

[icarusisaacs]

that is a pitot tube pickup, a broken pitot tube and the thru-hull clam-shell for the pitot tube

my guess, the speedo isnt working.

easy fix, complete kit with new pickup and 25 feet of hose is about $25

Thanks! I'm going to replace it when I redo the instrument cluster. The gauges are dated looking and after removing the access panel for the dash I'll probably end up doing a full re-wire. In the words of my 10 year old "It looks like a spaghetti explosion".

 

[Scott Danforth]

Thanks! I'm going to replace it when I redo the instrument cluster. The gauges are dated looking and after removing the access panel for the dash I'll probably end up doing a full re-wire. In the words of my 10 year old "It looks like a spaghetti explosion".

all boats look like a spaghetti explosion. some look like vermicelli.

being a 1988, pretty sure wiring and speedo is the least of your problems.

FYI - high probability the Sierra marine head gasket for the 470 will be problematic. suggest you get a mercruiser gasket.

 

[icarusisaacs]

FYI - high probability the Sierra marine head gasket for the 470 will be problematic. suggest you get a mercruiser gasket.

Good info to have BEFORE pulling the head and replacing the gaskets. The Sierra set comes with valve cover, valve guides, and intake and exhaust gaskets as well. I'll probably use those and buy the Mercruiser head gasket separately then.

 

[Scott Danforth]

BTW, what made you think its the head gasket?

if it was coolant in the oil, its more common for the cam snout and seal to leak

 

[icarusisaacs]

BTW, what made you think its the head gasket?

if it was coolant in the oil, its more common for the cam snout and seal to leak

That's what I was told by the guy I bought it from. Just that it "needs a head gasket". A cursory inspection of the oil and cooling systems did, in fact, show the coolant reservoir for the heat exchanger empty and the oil was over full and milky, both symptomatic of a blown head gasket That and after doing a little reading on the internet I discovered the 470 is notorious for head gasket issues because of the aluminum block mated with cast iron heads. I'll look into diagnosing it next week. I have a hydrocarbon sniffer at work but my shop is on vacation through Sunday. I'll fill it with coolant, check for exhaust gases in the cooling system, and check for leaks from the timing cover area as well.

 

[Scott Danforth]

its a toss up as to which happens first. as much as a 10 degree overheat and the open deck aluminum block with the iron head will spit the head gasket

however every 470 will need to have a speedi sleeve installed on the cam snout as none of the cam snouts were hardened and the seal wears a groove and coolant enters the oil. simply google mercruiser 470 and speedi sleeve.

if you didnt do a tear down yet. with the coolant out, do a coolant pressure test and follow where the leak is.

 

[Scott Danforth]

the other issue you may run into is your boat is 33 years old. you should inspect for water intrusion and rot.

 

[icarusisaacs]

Thanks. It looks like I may as well pull the motor and top end and just do it all at once, and with my work schedule it looks like it may be autumn before she sees water. I'm definitely going to go through her from stem to stern before I take her out. As far as the rot goes what are your recommendations for the best way to visually inspect for it short of cutting a hole in the deck? As far as I can tell there's no way to see the framework otherwise. The deck feels solid and "thumping" the transom feels densely consistent across the stern.

 

[icarusisaacs]

And by the way, thanks for all the info. That is the first I've seen on the seals with everything else having the head gasket as the culprit. Definitely helpful.

 

[icarusisaacs]

Thanks. It looks like I may as well pull the motor and top end and just do it all at once, and with my work schedule it looks like it may be autumn before she sees water. I'm definitely going to go through her from stem to stern before I take her out. As far as the rot goes what are your recommendations for the best way to visually inspect for it short of cutting a hole in the deck? As far as I can tell there's no way to see the framework otherwise. The deck feels solid and "thumping" the transom feels densely consistent across the stern.

And by the way, thanks for all the info. That is the first I've seen on the seals with everything else having the head gasket as the culprit. Definitely helpful.