bertram31.com

Marshall Mahoney

https://i.imgur.com/0H17CWM.jpg I used to carry a 10' aluminum flat boat the same way. Bench cushion on the transom. No problem launching over the transom. The issue is getting in and out of the dinghy without banging into the hull. You don't think you are going to bang it -- but you are going to b...

Marshall Mahoney

Another data point for you. Sounds like I have a similar setup as you. I have 300 HP 6BTA M2 CPL 970 with 7mm injectors. 1.5.:1 gears. I swing 20x23 Nibral Michigan Hytorq 4 blade propellers with medium cup . I feel that I am slightly under propped but I'm fine with that. I have a flybridge curiser,...

Marshall Mahoney

Caye Caulker Belize. Season opened July 1. I have never seen so many lobster. Got some nice lionfish while diving. Lionfish ceviche and grilled lobster -- hard to beat. A Bertram 31 sure would have looked good on the island...

Marshall Mahoney

Some pirates have parrots...

Marshall Mahoney

Could have sworn mine bolts were metric. Inspect the gearbox coupling "centering ring??" prior to reassembly. When my bolts sheared, the centering ring got a small ding in it that prevented me from aligning the shaft. Took me forever to figure out the issue. Had to file the defect down.

Marshall Mahoney

I'm curious -- how did the shaft shop determine that the shafts needed to be replaced? As a side note, most of the shrimpers in Louisiana use Aquamet 19. Since they run their boats frequently, they don't have the crevice corrosion in at the cutless bearing that Carl mentions above.

Marshall Mahoney

That is where my wash down pump suction is. Or livewell like Carl said...

Marshall Mahoney

I used a harmonic balance puller. There is some risk of deforming the coupling flange, but I never had a problem. I found that putting the coupling back on was actually harder. I ended up having to put a block of wood against the flange face inside the boat, lube up a cutlass bearing, and repeatabll...

Marshall Mahoney

I just realized I was responding to Jack from 2018 . Oops -- sorry for the late response Jack!

Marshall Mahoney

I think I still have the paper template

Marshall Mahoney

I made mine out of a piece of smoked plexiglass. No frame but I still looks good. I used my old one as a template to trace out the shape on paper. Them I cut it out of the flat piece of plexiglass. I put the ends in the oven one a time until they got "floppy" and draped them over my old one to make ...

Marshall Mahoney

Looks great. I changed my mind -- I want it back. Ha!

Marshall Mahoney

I fished with Walter in 2005 in Vic Roy's tourney at Port Eads. We caught a fat yellowfin. Wow, 2005 -- where does it go? I just flipped thru his cookbook. Thanks for posting -- good memories...

Marshall Mahoney

I think these were the ones I used

Marshall Mahoney

My strips had a square base that pressed perfectly into a 1/4" aluminum channel. I screwed the channel into some existing wood that was glassed to the underside of the gunnel. I do not have panels on my gunnels -- just open space. The lights shine straight down. On my flat boat, I simply zip tied th...

Marshall Mahoney

One of mine moved... The cutless bearings are press fit into the strut, with set screws for extra precaution to keep them from spinning/moving. I have original struts and with years of light corrosion and sanding inbetween cutless bearing replacements so "my press fit" has turned into a light press ...

Marshall Mahoney

I used LED strip lights off of e-bay under the gunnels. Lights up the deck well without being blinding.

Marshall Mahoney

So... for a couple of years my neighbor has blamed me for his (and my) "quickly" dissolving anodes -- get a bit less than a year out of them. I keep my main circuit breakers open when docked, and the only thing live is shore power, battery chargers, and bilge pumps. My faulty alternator would not ha...

Marshall Mahoney

I hate electricity...

Marshall Mahoney

Thanks Tony. I should have thought it thru -- makes sense now. Checking it out today.

Marshall Mahoney

Tony -- did you mean test with amp meter (by putting an amp meter between the negative cable negative battery terminal)? Not sure how I would test with ohm meter. The alternator had some sort of internal short because it was creating a path from the positive post on the alternator to the engine bloc...

Marshall Mahoney

Tony -- check out my post on alternator short. I have been fighting electrolysis as well -- may have traced it to a bad alternator. Or you can use the same set up and turn on one breaker at a time to see if you are bleeding current somewhere else. From what I have read, stray DC current on your boat...

Marshall Mahoney

I was installing a battery in my boat and for some reason I had the idea to check for voltage between the the negative battery post and the negative battery cable (Positive cable/post connected). Selector switch off and all breakers off -- reading near 0 volts. When I turned the selector switch on, ...

Marshall Mahoney

I sent Alexseal a question on Turtle wax and McGuire's hybrid ceramic coatings spray. Works really good on my truck (turtle wax easier to apply). If I don't hear back from them I will just use one of their current recommendations that Bruce found. I want to verify compatibility so I don't screw up m...

Marshall Mahoney

Thanks Bruce -- I have never seen this. Perfect

Marshall Mahoney

I was just trying to follow Alexseal recommendations to use a wax -- they were just not specific on what type...

Marshall Mahoney

Does anyone have a recommendation for wax or coating for boat freshly painted with Polyurethane? The Alexseal website recomended "wax formulated for polyurethane paint" but was not specific and they did not respond to my e-mail. I went thru several pages of topics but did not turn up anything specif...

Marshall Mahoney

I was running down river in my buddies center console in a low hanging fog. If I stood on the gunnel of the boat I could see pretty good over the fog. It took me 30 minutes to realize that I was eye to eye with his open array radar. I got off of the gunnel and was throwing up over the side 20 min la...

Marshall Mahoney

Finished the compression test (cold engine). I could not find official compression numbers, but Googling showed new engines in the 400 psig range and older engines in the 300 psig range. Test gauge is accurate. So stbd is on the low end. Port #6 cylinder way low. Since it is closest to the exhaust o...

Marshall Mahoney

I'm on it!

Marshall Mahoney

Neil -- did you tan it yourself. I was trying to figure out how to do it on youtube today...

Marshall Mahoney

Got bored at my wife's family reunion in North Carolina so I spent 3 days finding fossilized shark teeth on the beach. "What the hell are you going to do with all of those shark teeth?" they asked...

Marshall Mahoney

I bet I could hit that...

Marshall Mahoney

I cut 1-1/2" diameter clear acrylic tubes and coiled up red and green LED waterproof light strips inside of the tubes. No more issues with the light sockets getting wet and corroding. Looked great in the garage with the lights out. Will see how bright they are on the boat. There is a fine line betwe...

Marshall Mahoney

I can't afford art...

Marshall Mahoney

I would not worry about a corded spotlight. Get a Streamlight Waypoint handheld spotlight. A bit expensive but worth it in my opinion.

Marshall Mahoney

That settles it -- going to check compression (right after I get back from my wife's week long family reunion -- god help me). I checked my valve lash. Some were way out but made no noticeable difference. Lot of pitch and roll tied up to oil rigs offshore -high probability of getting water backing i...

Marshall Mahoney

Unknown hours (running take outs). 1990"s vintage. I start them at least one every 2 weeks, run them to the fishing grounds (hours) 4-8 times a year and short cruises a few times a year. I run them at 2200 rpm. Noticing the issues in the past 1-1/2 years.

Marshall Mahoney

I had one on the bridge, but made of metal. Mine was for a hand held spotlight.

Marshall Mahoney

I think I have too much blow by. My engines do smoke a bit and I have lost fuel economy. I can see a diesel sheen at the dock at idle (injectors tested fine). I can't do a blow by test or performance checks because my boat is out of the water. So -- I think I could get some good information from a c...

Marshall Mahoney

Not answering your question but after you pull your old cables out, use a side grinder to cut the sheath off of one end of the cable and pull the stainless wire out of the sheath. High quality stuff and has to be good for something. Not sure what but waste not I say...

Marshall Mahoney

If Bob says 4" hot pipe will work, I am good with that. In fact, I am very happy with that...
Guys -- thanks for all of your input. Got to love Bertram31.com!

Marshall Mahoney

Or blast it yourself in your driveway just to piss off the wife...

Marshall Mahoney

Bob-- not sure what you mean by "volumetric efficiency" -- those are some mighty big words. You are saying that 4" is plenty for the hot piping in a 300HP? Seaboard seems to indicate 5" but he mentions 4" as well. 4" is certainly cheaper and easier to route than 5". No issues with 316L for the mixin...

Marshall Mahoney

Y'alls engines are so pretty and white -- so weird.
Jason -- it looks like you have a 3" x 4" reducing elbow coming out of your turbo, then the rest of your pipe is 4" correct? Also -- what is your HP?

Marshall Mahoney

Thanks guys -- these are really great pics. 5" ID pipe would be ideal for my 300 HP but harder to come by. Now I need to figure out how to open my wallet.

Marshall Mahoney

Dryer hose -- I like it. I found a picture of your starboard elbow on the bench. Did you post pics of starboard and port risers installed before insulation?

Marshall Mahoney

You said it Mark "time is short." Live every minute guys. I fished the 2005 UVI. Laughed for 3 days straight. Thanks Uncle Vic.

Marshall Mahoney

Thanks -- I am familiar with Sboard and the theory of design. Just seeing if someone had drawing to give me an easier place to start. I am looking to have them fabricated locally -- not purchase them. I have a lot of blowby in both of my engines. There is a good chance that I have had water back up ...

Marshall Mahoney

Does anybody have drawings for exhaust risers on their Cummins?

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