Engines, Electronics and Things that Break! Sun, 12 Apr 2026 05:30:05 +0000 Sun, 12 Apr 2026 05:30:05 +0000 YachtForums: We Know Big Boats! https://www.yachtforums.com/superyacht/technical-discussion.5/ Mon, 06 Apr 2026 03:19:33 +0000 https://www.yachtforums.com/threads/trident-vs-vetus-vs-raritan-sanitation-hose.40140/ https://www.yachtforums.com/threads/trident-vs-vetus-vs-raritan-sanitation-hose.40140/ invalid@example.com (CaboFly) CaboFly
Thanks]]> 2 Sun, 05 Apr 2026 06:03:56 +0000 https://www.yachtforums.com/threads/luhrs-window-replacement.37997/ https://www.yachtforums.com/threads/luhrs-window-replacement.37997/ invalid@example.com (Jporretto23) Jporretto23 2 Sat, 04 Apr 2026 01:12:22 +0000 https://www.yachtforums.com/threads/yacht-controller-service.38678/ https://www.yachtforums.com/threads/yacht-controller-service.38678/ invalid@example.com (zen) zen 9 Sat, 28 Mar 2026 13:52:33 +0000 https://www.yachtforums.com/threads/quick-lift-davit.35875/ https://www.yachtforums.com/threads/quick-lift-davit.35875/ invalid@example.com (Captain Estee) Captain Estee Mark]]> 43 Sun, 22 Mar 2026 17:44:20 +0000 https://www.yachtforums.com/threads/tracing-compressed-air-system-leak.40104/ https://www.yachtforums.com/threads/tracing-compressed-air-system-leak.40104/ invalid@example.com (Pascal) Pascal
it s long hose run from the compressor in the ER to the horn solenoid valve in the skylounge, including a second accumulator tank and a drain pipe going back down to the ER…

i considered using pressurized...

Tracing compressed air system leak]]> 5 Fri, 13 Mar 2026 02:13:00 +0000 https://www.yachtforums.com/threads/volvo-penta-d2-75.13859/ https://www.yachtforums.com/threads/volvo-penta-d2-75.13859/ invalid@example.com (vivariva) vivariva
I kindly would like to ask a technical question for an issue which we are unable to solve through the local Volvo engine dealer in our country.

The boat in question is a Bavaria 47 Sailboat, produced in late October 2009 and delivered around November of the same year to Turkey.

You could find the specs in the Bavaria website, www dot Bavaria-yachtbau dot com

The problem in summary is as follows: The engine installed is the Volvo Penta D2-75 with a 3 three...

Volvo Penta D2-75]]> 9 Sat, 07 Mar 2026 14:38:49 +0000 https://www.yachtforums.com/threads/offshore-48-fuel-tank-test-and-replacement.40074/ https://www.yachtforums.com/threads/offshore-48-fuel-tank-test-and-replacement.40074/ invalid@example.com (Salish Fisher) Salish Fisher
we are looking at a couple Offshore 48s, late 90’s. The fuel tanks were all steel and prone to rusting. Does anyone have first hand experience or know others who might have gone through testing and perhaps replacement? I appreciate a dialogue with someone on this.

Thx
D]]> Thu, 05 Feb 2026 15:36:04 +0000 https://www.yachtforums.com/threads/analog-gauges-qsm-11-mmdc.40009/ https://www.yachtforums.com/threads/analog-gauges-qsm-11-mmdc.40009/ invalid@example.com (Davys Locker) Davys Locker View attachment 110488 View attachment 110489]]> Mon, 19 Jan 2026 12:43:43 +0000 https://www.yachtforums.com/threads/2008-77-horizon.39967/ https://www.yachtforums.com/threads/2008-77-horizon.39967/ invalid@example.com (publicadjuster) publicadjuster So when the compressors do their thing the noise of the compressors charging up and then discharging on the down cycles (best description I can give of their function) not...

2008 77 Horizon]]> 1 Thu, 04 Dec 2025 17:04:29 +0000 https://www.yachtforums.com/threads/jet-drive-vs-prop.4470/ https://www.yachtforums.com/threads/jet-drive-vs-prop.4470/ invalid@example.com (brian eiland) brian eiland Jet vs Prop" The problem is most of this discussion was centered around larger yacht systems.

I seek to get a discussion going of smaller units as utilized on vessels in the 10-30' foot range. I've included a couple of quotes from that other subject thread that...

Jet Drive vs. Prop]]> 55 Tue, 11 Nov 2025 15:26:44 +0000 https://www.yachtforums.com/threads/silverton-453my.39844/ https://www.yachtforums.com/threads/silverton-453my.39844/ invalid@example.com (DoorG) DoorG
I own a 2000 Silverton 453 and through the years things have broken and been fixed.

However, the one thing that I am now having a problem with is the built in Trash Compactor which is a 12" wide model that has been discontinued for many years now.

I am trying to find someone that works on this model that perhaps knows of a compactor that I can buy to get my boat perfect again. I don't even care if the unit is severely damaged as long as the guts are fine so that I can re-build...

Silverton 453MY]]> Wed, 15 Oct 2025 22:31:19 +0000 https://www.yachtforums.com/threads/canados.39762/ https://www.yachtforums.com/threads/canados.39762/ invalid@example.com (Jarle Lunde) Jarle Lunde
We are concidering buying a old Canados 70 Ft built in 1985.
Hull and superstructure is built in marine plywood and epoxy.
Any here who have any experiende with boats build in these materials, or my Canados yachts ?]]> 10 Mon, 06 Oct 2025 20:32:32 +0000 https://www.yachtforums.com/threads/engine-controls.39736/ https://www.yachtforums.com/threads/engine-controls.39736/ invalid@example.com (SplashFl) SplashFl 35 Tue, 16 Sep 2025 18:40:53 +0000 https://www.yachtforums.com/threads/water-pipe-fitting.39684/ https://www.yachtforums.com/threads/water-pipe-fitting.39684/ invalid@example.com (SplashFl) SplashFl
View attachment 109124]]> 8 Wed, 20 Aug 2025 21:33:35 +0000 https://www.yachtforums.com/threads/hull-paint-alexseal-or-awlgrip.13743/ https://www.yachtforums.com/threads/hull-paint-alexseal-or-awlgrip.13743/ invalid@example.com (T.K.) T.K.
Which paint is better or more suitable for the marine enviroment, Alexseal or Awlgrip. We will be spraying a hull of a 60ft sport cruiser.

Thanks...........

Tarek]]> 140 Wed, 20 Aug 2025 10:47:21 +0000 https://www.yachtforums.com/threads/watertank-and-system-riva-superamerica-42.39645/ https://www.yachtforums.com/threads/watertank-and-system-riva-superamerica-42.39645/ invalid@example.com (Bjørn Aunan) Bjørn Aunan Do anyone on the page kniw where the drinking water tank is placed on a Rva SA 42 -1975 year ?
I cannot locate it.]]> Tue, 19 Aug 2025 03:27:50 +0000 https://www.yachtforums.com/threads/oil-x-change-r-manual_-model-946dt.39640/ https://www.yachtforums.com/threads/oil-x-change-r-manual_-model-946dt.39640/ invalid@example.com (SplashFl) SplashFl File Too Large, so if anyone knows a fix or provides an email or upload site I'll send it.]]> 6 Tue, 12 Aug 2025 04:37:02 +0000 https://www.yachtforums.com/threads/topside-touch-up-of-unknown-paint.39624/ https://www.yachtforums.com/threads/topside-touch-up-of-unknown-paint.39624/ invalid@example.com (incoming) incoming
I realize it’s not going to be possible to achieve perfection but I’d like to do what I can to touch up some of these spots.

Based on my research so far I’m leaning towards petit ez poxy as my topcoat and ez primer underneath, and their ez...

Topside touch up of unknown paint]]> 7 Fri, 08 Aug 2025 21:53:21 +0000 https://www.yachtforums.com/threads/searay-44-sedan-bridge-hydraulic-swim-platforms.38245/ https://www.yachtforums.com/threads/searay-44-sedan-bridge-hydraulic-swim-platforms.38245/ invalid@example.com (Mac Holley) Mac Holley
Searay 44 Sedan Bridge - hydraulic swim platforms]]> 7 Thu, 31 Jul 2025 15:03:52 +0000 https://www.yachtforums.com/threads/hynautic-hydraulis-controls.38985/ https://www.yachtforums.com/threads/hynautic-hydraulis-controls.38985/ invalid@example.com (SplashFl) SplashFl 44 Tue, 29 Jul 2025 19:51:26 +0000 https://www.yachtforums.com/threads/what-is-this-old-thing.39588/ https://www.yachtforums.com/threads/what-is-this-old-thing.39588/ invalid@example.com (SplashFl) SplashFl
View attachment 108758

View attachment 108759]]> 19 Sat, 26 Jul 2025 16:47:38 +0000 https://www.yachtforums.com/threads/please-explain-what-this-is-and-does.39587/ https://www.yachtforums.com/threads/please-explain-what-this-is-and-does.39587/ invalid@example.com (David Becker) David Becker what are these for? How do they work?]]> 1 Wed, 23 Jul 2025 02:29:29 +0000 https://www.yachtforums.com/threads/dual-waters-bottom-paint.39564/ https://www.yachtforums.com/threads/dual-waters-bottom-paint.39564/ invalid@example.com (Capt Ralph) Capt Ralph Were back from a six week deployment. We leaped froged down the Florida coast to Elliot Key and back.
All while dragging our 17’ Mako.
The weather stayed tolerable and all offshore. Gad we hate the ditch.

When we departed our fresh water dock, I knew there was just a littlie green fuzz on both boats waterlines. All seemed clear and despite dragging the 17’ brick, all ran very well.

Reminder to self; Never drag a drone (brick) again…

When we reached...

Dual waters bottom paint ??]]> 15 Tue, 22 Jul 2025 08:54:46 +0000 https://www.yachtforums.com/threads/arno-leopard-marine-flush-valve.39550/ https://www.yachtforums.com/threads/arno-leopard-marine-flush-valve.39550/ invalid@example.com (Adam C) Adam C
Here is a photo of the flush valve with a logo on it. It's a 1998 Arno Leopard yacht so Italian build. Any insight on even potential manufacture would be greatly appreciated! Thanks]]> 25 Mon, 21 Jul 2025 20:39:20 +0000 https://www.yachtforums.com/threads/vacuflush-vs-regular-macerator.39525/ https://www.yachtforums.com/threads/vacuflush-vs-regular-macerator.39525/ invalid@example.com (CTdave) CTdave This is a direct replacement that I found but again, nothing I can get today and fix the issue.]]> 22 Mon, 07 Jul 2025 01:14:06 +0000 https://www.yachtforums.com/threads/sea-star-hydraulic-steering.39510/ https://www.yachtforums.com/threads/sea-star-hydraulic-steering.39510/ invalid@example.com (92Searay-37') 92Searay-37'
I am experiencing very bumpy/lumpy steering as well as hard to turnover. In your opinion is this a system bleeding issue or something with seals in the helm or cylinder itself. I see no noticeable leaks.

Another concern is that in the picture attached you can see the bleeder valves have been connected with tubing. I am unsure if that is appropriate to be like that all the time. I have read that this...

Sea Star Hydraulic Steering]]> 19 Sun, 06 Jul 2025 13:56:24 +0000 https://www.yachtforums.com/threads/cautionary-tale-broken-davit-cable.39519/ https://www.yachtforums.com/threads/cautionary-tale-broken-davit-cable.39519/ invalid@example.com (incoming) incoming
Background: the davit is a 600 lb rated UMT davit/bow crane with a dutton lainson winch. The winch is spooled with 25' of 3/16" stainless cable. The cable...

cautionary tale - broken davit cable]]> 14 Sat, 28 Jun 2025 13:41:18 +0000 https://www.yachtforums.com/threads/in-the-abacos-and-would-like-some-ac-advice.38608/ https://www.yachtforums.com/threads/in-the-abacos-and-would-like-some-ac-advice.38608/ invalid@example.com (motoryachtlover) motoryachtlover
In the Abacos and would like some AC advice]]> 25 Tue, 24 Jun 2025 01:59:00 +0000 https://www.yachtforums.com/threads/isolation-transformers.39486/ https://www.yachtforums.com/threads/isolation-transformers.39486/ invalid@example.com (alvareza) alvareza 10 Sun, 20 Apr 2025 19:21:53 +0000 https://www.yachtforums.com/threads/another-tnt-platform-issue.39379/ https://www.yachtforums.com/threads/another-tnt-platform-issue.39379/ invalid@example.com (Pascal) Pascal
as a test, we filled the reservoir and placed shop towel around the filler. After an hour the second was down a little and fluid had spilled out of the tank

I am guessing the valve in the valve block is leaking and allowing fluid to be pushed back under pressure? Can they be disassembled and cleaned ?]]> 12 Mon, 24 Mar 2025 16:04:35 +0000 https://www.yachtforums.com/threads/charging-a-24-v-using-two-12-v-alternator.38987/ https://www.yachtforums.com/threads/charging-a-24-v-using-two-12-v-alternator.38987/ invalid@example.com (Pascal) Pascal View attachment 106237 My 53 has a dual voltage system, with 12 volt C series Cummins and 24 volt house system. Reason being that Cummins was charging an extra $1500 per engine to upgrade to 24 v when I repowered…

so far we ve always been running the gen when off the dock so the house bank gets charged by the battery charger / generator. It works fine but in the future I may add an inverter (with its own bank) and obviously if we loose either gen or the charger we can’t charge the...

Charging a 24 v using two 12 v alternator]]> 24 Sat, 22 Mar 2025 21:39:31 +0000 https://www.yachtforums.com/threads/isis-tank-levels.39178/ https://www.yachtforums.com/threads/isis-tank-levels.39178/ invalid@example.com (richierich33) richierich33 3 Wed, 12 Mar 2025 17:39:06 +0000 https://www.yachtforums.com/threads/two-issues-on-survey.39288/ https://www.yachtforums.com/threads/two-issues-on-survey.39288/ invalid@example.com (gr8trn) gr8trn
1.The shorepower connection was improperly wired or defective,with no ground wire connection to the dock. This is an unsafe condition and renders the ELCI and GFCI residual current devices on board inoperal.

Have a qualified marine electrician diagnose and repair the system. ...

two issues on survey]]> 19 Tue, 11 Mar 2025 21:02:20 +0000 https://www.yachtforums.com/threads/odd-switch-issues.39297/ https://www.yachtforums.com/threads/odd-switch-issues.39297/ invalid@example.com (Pascal) Pascal

Carling switch, single pole double throw with indicator light. No off position. 24 volt system. Load disconnected from the switch.


With the ground wire connected for the indicator light to work:
Switch OFF, indicator light OFF, I get 0 volt on pin A and 24 volt on pin B

Switch ON, indicator light ON: I get 12 volts on pin A and 0 volt on pin B

with the ground wire off, voltage reads 24...

Odd switch issues…]]> 1 Mon, 03 Mar 2025 22:09:10 +0000 https://www.yachtforums.com/threads/cabo-35-express.39265/ https://www.yachtforums.com/threads/cabo-35-express.39265/ invalid@example.com (Cabo Pete) Cabo Pete 4 Mon, 03 Feb 2025 02:07:38 +0000 https://www.yachtforums.com/threads/trojan-boats-stringer-delamination.27026/ https://www.yachtforums.com/threads/trojan-boats-stringer-delamination.27026/ invalid@example.com (rnburns81532) rnburns81532 5 Sun, 26 Jan 2025 16:53:39 +0000 https://www.yachtforums.com/threads/your-boating-stories-could-help-me-out.39172/ https://www.yachtforums.com/threads/your-boating-stories-could-help-me-out.39172/ invalid@example.com (LFab79) LFab79 I’m Luca, a Stanford student working on a project all about boats and innovation—and as someone who loves the sea, rivers and lakes and everything about boating, I figured there’s no better way to learn than from the people who know it best!
I’m looking to connect with people like you to hear your stories, thoughts, and ideas about boats, yachts and boating. Whether it’s your favorite part of being on the water, challenges you’ve faced, or just what you’d love to see improved,...

Your Boating Stories Could Help Me Out!]]> 3 Tue, 21 Jan 2025 19:19:45 +0000 https://www.yachtforums.com/threads/replacing-the-galley-door-on-a-2002-cruiser-yachts-4450.39174/ https://www.yachtforums.com/threads/replacing-the-galley-door-on-a-2002-cruiser-yachts-4450.39174/ invalid@example.com (Lil RnR) Lil RnR Mon, 20 Jan 2025 13:04:24 +0000 https://www.yachtforums.com/threads/raritan-flushing-issues.39171/ https://www.yachtforums.com/threads/raritan-flushing-issues.39171/ invalid@example.com (incoming) incoming
It seemed to flush fine at first but after several successful “liquid” flushes, it won’t flush “solids”

This happened once with the old unit as well just before I pulled it out. Then, I fixed it by flushing while running the boat on plane. I thought maybe the discharge/macerator pump was going bad.

But I also had a few instances with the old unit would...

Raritan flushing issues]]> 9 Mon, 20 Jan 2025 03:07:11 +0000 https://www.yachtforums.com/threads/14-rib-replace-steering-cable-or-upgrade-to-hydraulic.39043/ https://www.yachtforums.com/threads/14-rib-replace-steering-cable-or-upgrade-to-hydraulic.39043/ invalid@example.com (DOCKMASTER) DOCKMASTER
14’ RIB - Replace Steering Cable Or Upgrade To Hydraulic?]]> 8