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Messages - rmbrown

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Main Message Board / Re: Core Repair Under Cowl Vents
« on: July 24, 2019, 12:58:45 PM »

I have, and I considered them, but I ended up getting the solar day/night vents instead.  I might regret that decision.  I'll let you know!


Main Message Board / Re: Core Repair Under Cowl Vents
« on: July 24, 2019, 12:01:24 PM »
Could you determine the brand of duct tape?  I'll likely need to replace mine.


Main Message Board / Re: Holding Tank Vent Question
« on: July 19, 2019, 10:58:21 AM »
I have the same problem.  We could put it on the side of the tank, but I'm guessing we'd then have to give up the top 1" or more of tank capacity and I really hate to do that.

Yep, me too... except that day.

Main Message Board / Re: Core Repair Under Cowl Vents
« on: July 15, 2019, 03:53:34 PM »
Noah... rest easy my friend... no placing blame here.  I cut into that tower primarily because the screws that hold the deck plates and teak trim rings down only go 1/2" into that deck tower and, since two of them spun out, I assumed that "wood" was rotten!

Also, while I can definitely see the possibility of the water getting to the core some other way, I'm hopeful that's not the case because while on a 2+ week trip, we had a lot of rain and both cowls had water dripping from the core... bad enough that I had dishpans under them.  I removed both cowls and screwed in the deck plates and wet them with a hose... the dripping, from the core split, was immediate.  I pulled up the trim rings and deck plates with the intention of rebedding them with butyl tape.  I got one rebedded but only two screws would hold and, since there was a storm coming, I just taped a piece of plastic over the screw holes and deck plate 3.75" opening.  Two days of rain and no drip.  Sprayed it with a hose and no drip.  Not one single drop from either cowl vent, then or since.  Question then is how is the water getting from the upper screw holes to the core... I think me and a 1/2" bit are going to answer that question from the top.  Unless, of course, I change my mind before I get back to the boat saturday. :D

Main Message Board / Re: Core Repair Under Cowl Vents
« on: July 15, 2019, 02:45:10 PM »
Warren's reply...


Hi Mike,
Below the teak ring, the “raised tower” should be all fiberglass and FRP related products, so the wood deck core typically won’t be found or start until you are about 3/8” to ˝” below the surface of the surrounding walk deck.


It looks like all I did from the top was make a mess... I'll either have to cut all the way down, which would be crazy, cut up from the bottom, or tackle it from inside the tube.   Time to sleep on it.

Main Message Board / Re: Core Repair Under Cowl Vents
« on: July 15, 2019, 12:07:46 PM »
I'll give warren a day or so and then call. :)

Main Message Board / Re: Core Repair Under Cowl Vents
« on: July 15, 2019, 11:36:06 AM »
In hindsight, it being 2020, or even better, I wish I'd just drilled through the screw holes to see what I have... but I'm pretty sure (not) that what I'll find is a small ring of plywood glassed into the tower that's likely  got some rot but could be sufficient repaired by just overdrilling and filling with epoxy, and then way more significant core damage at deck level. 

I'd guess the tower is 3" tall, from hull liner to deck plate mounting surface and I'd further guess that about 2" of that is tower and 1" is deck.

If have my thoughts on what the inside of the tower looks like but I'm really hoping that Warren @ Catalina will educate me before I proceed. :)

Main Message Board / Re: Nicro Dorade (1989) Parts
« on: July 15, 2019, 08:41:20 AM »
My December 92 built 93 model year requires the 3" vents rather than the 4, unless I want to enlarge the hold and reglass the tube.

Main Message Board / Re: Core Repair Under Cowl Vents
« on: July 15, 2019, 08:36:25 AM »
I opted to cut out the top of the tower, expose the rotten wood... hopefully all of it... by removing as much fiberglass skin as I could and still have the patch covered by the 9" vent.

I used a zip saw to follow my pencil line and I've managed to get down 1/2 to 3/4 inches... and I'm still in fiberglass!  These towers don't appear to be hollow and don't appear to entirely wood filled.  I've emailed Warren Pandy at Catalina for more intel.  I just sealed it back up this weekend and decided to sleep on it.

Here's a photo of where I'm cutting.

Main Message Board / Re: Oil coming from the air filter
« on: July 15, 2019, 08:27:58 AM »
I had a better look at mine this weekend and it's clamped to the air filter but has always been free to drip straight down on the engine bed.  I see several good solutions for keeping things clean in this post but my concern is that I'm just now seeing this drip and I've run the boat for 3 years and maybe 150 hours... why am I only seeing it in the last 40?  How much oil is normal and why did mine just start dripping!

Main Message Board / Core Repair Under Cowl Vents
« on: July 11, 2019, 01:08:14 PM »
So first, let me set the scene...  My cowls were not mounted in a dorade box or even using a plastic cylindrical dorade.  This is a problem, but not the basis of my question.

I plan to replace the cowls with marinco day/night solar vents, but prior to making that decision, I thought I might just try to rebed the old ones and deal with the lack of dorade.  What I had on the deck was a teak ring, maybe 1.5" tall and the deck plate into which the cowl threaded was mounted in that ring.  4 screws went through that plate and ring and into deck to hold it in place.  The bedding apparently long since gave up the ghost, and the teak ring had split along the grain, both allowing water to penetrate into the deck and rotting out the core surrounding them.  My first indication of a problem was dripping from the teak ring mounted inside the boat supporting the screen.

When I removed the inner ring, I could see a split in the fiberglass tube where the deck had swollen when wet maybe just swelling with the water, maybe with freezing of that water, not sure.

I removed the cowls, deck plates and rings, covered with plastic and duct tape, and sprayed the heck out of the surrounding area (traveler bar included) to see if the cowl deck plate screws were the source of the water or just where it ended up.  The area stayed dry, so I'm going with my theory that the four screws were the source of the water.

I have new deck plates and screws but first have repair at least some of the bad core... which is actually what I have questions about.

I'm trying to determine how much glass, if any, to cut out, or whether to just overdrill, fill with epoxy, and redrill for through bolts when I replace.

Thoughts, recommendations, horror stories and constructive criticism all welcome. :)

Thanks for the words of wisdom... some of it hard won.

I'll go this weekend, pull the old impeller, which was new 6 weeks ago and go spelunking for any missing chunks.  HX rodded out last fall (and the difference in water flow was amazing) but if there are missing impeller bits, I'll open it up.

I'll check the riser nipple and inlet connection to the muffler, but hoping that the adventure was short lived enough that I'm OK there.

I've been running maybe 170 on the gauge (which matches pretty well with my IR thermometer when directed to the housing... now I'm closer to 180, so something changed.  Not sure what thermostat I'm running.  When I bought the boat three years ago, it was changed by a mechanic I hired to go over engine and do deferred maintenance.


Impeller replaced 6 weeks ago, but I swear it was running 5-10 degrees cooler on my recent trip than the current 180.  Maybe the impeller is worn and now generating as much flow.  Maybe (definitely) I'm just paranoid.

Yah... coolant is a touch low. :D

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