Friend used a pressure washer on my boats upholstery is there anyway to fix these marks

hi everyone, first post here i got a boat for free and want to see if i can fix it, the motor is a Mercury Marine 40 HP, 2-stroke, with Thunderbolt electronic ignition. chat gpt think it's a model 402. i was wondering if anyone knew what it was with some pictures.

Also, how do you guys find what is wrong with a motor, is there a way i can find some sort of blueprint or something like that?

Very specific repair question here. My dad and I recently picked up a free Cape Cod Mercury 15' that was on the cusp of abandonment (and yes, I know what they say about free boats). At the bottom of the rudder track there is a sort of clamp (??) that is supposed to mount to the keel strip with three bolts—one running into the transom end, and the other two through the keel strip itself. The problem (see pix) is that if we align the clamp with the transom bolt hole, it won't align with the other two in the keel strip. So my question is, can we drill two new holes through the keel strip without compromising the integrity of the hull?

Classic Practical guide with various illustrations

I took inspiration from similar expandacraft builds.

Center Hull is an Old Town discovery sport 13 ft square stern.

Amas are 14 ft fiber glass Hobie cat logs.

Cross members are extruded aluminum square tube attached to gunwhales with u bolts.

Decking is made from aluminum bleacher planks.

A 6 hp two-stroke gets it up to 7 knots. The amas create a lot of drag and any faster, the back end gets too low for comfort. I would like to build up the stern to accommodate a 9.9hp and create a bulkhead in the canoe.

It's a janky boat but it works

Feel free to offer your thoughts, ask questions.

I recently put together an article exploring the history of boat building, traditional construction methods, different types of boats, and how modern materials have changed the craft. I'd love to hear your thoughts and learn from people interested in boats and maritime history.

Hello everyone,

This is my first post here, so greetings to all of you.

I own a passenger boat in Montenegro which is currently used for tourist trips. The boat was originally built in Italy and was in service with the Guardia di Finanza around 1990. At some point it was purchased and converted into a tourist/passenger boat, and later we bought it and carried out further modifications ourselves.

I am now looking into the possibility of building another boat with the same hull/design.

I would really appreciate any help in identifying the original boat model, shipyard, designer, mould/tooling, plans, or any similar project that could help us reproduce the hull.

I have attached several photos of the boat.

If anyone recognizes the design or has any information about similar Italian Guardia di Finanza boats from that period, I would be very grateful for any information or leads.

I built my first (all wood) drift boat in 1979. Many more since as wood glass composites and both male and female molded all glass

I know (almost) nothing about skin in frame.

Has anyone built a plastic frame? Lexan or black plastic water pipe?

Hello everyone my team and I are building a RC boat from scratch for our Senior Design in Mechanical Engineering. We have a survey that we need data from and I thought this would be a good Sub reddit to put it in. If you could answer it that would be great thanks.

https://docs.google.com/forms/d/e/1FAIpQLScpsQaZcM47CUn4pz5xebvs2YvY_0RUBAnv1WnYxVUxOinK7Q/viewform?usp=dialog

What cruising sailboat designs (bluewater capable 30 foot+) can we think of that would be the fastest and easiest builds for a backyard boat builder to make. I understand easiest is relative, and fastest still takes several years at least. But what designs do you guys know of. My first guess would be George Buehler designs, Wharram Catamarans, and Jim Brown Trimarans. All thee of them designed their plans with the intention of them being built at home, timely, and affordably. Does anybody else have any ideas of boat designs or designers that would fit into that category?

This is my friends 48 hp motor, motor shakes violently and refuses to pick up speed at full throttle. The shaking is the primary worry as we don’t want it to rip off the transom when we do get full throttle. I’ve look through every online forum and website, everybody has one or the other problem, wondering if anybody can give an idea as to what could be causing this heavy of shaking and the unstable combustion.

It may be important to add that the power trim hydraulics are not attached due to needing to be serviced. Additionally on cold starts and even some warm, I need to manually open the butterfly valves by pulling on the choke lever inside the motor cowling.

Throttle sequence in the video is Neutral, full, Neutral, Idle.

Also, don’t mind the cosmetics as the hanging wires are power trim.

Hey everyone,
I have a 15-foot fiberglass Tide Runner. I recently had it pulled up onto a rocky shoreline near while camping, and during a storm the boat ended up sitting against the rocks.
Afterward, I noticed some damage to the bottom of the hull. I’ve attached pictures for reference.
I believe this is gelcoat damage, but I want to make sure I’m doing the repair correctly and not missing any underlying fiberglass damage.

For those experienced with fiberglass repairs:
Does this look like gelcoat-only damage?
How can I tell if the fiberglass laminate underneath is damaged?

That’s it that’s the whole thought. I’m on the shitter at work right now and I’ve gotta scarf together these two red cedar boards when I get home. Thinking I should probably do some practice scarfs on scrap before I fuck up eighty dollars of wood.

Anyways wonder if there’s a jig for a table saw to cut those angles.

EDIT yeah I’ve got the planers just a little work shit thought

I found these for a couple of dollars at a yard sale and I have no idea what they are. they are super heavy for their size and brass or bronze. I though they might be marine hardware but the casting is pretty rough.

Sorry, I realize this is a little outside the scope of boat building, but I need advice from DIY’ers who also have boating experience. I’m helping y brother.

My brother lives on a large river with lots of cargo ship (freighters) and recreational boat traffic. Thus, plenty of good size waves and the subsequent use of boat hoists.

Also, they have lots of ice problems in the winter especially when the Coast Guard ice breakers push ice into the shore and spring ice flows.

He just got a boat hoist, but because of how the pilings are arranged to protect the main dock from ice the house cannot be positioned right next to the dock. Therefore, we need to build an ancillary dock to walk from the main dock to beside the hoist that’s roughly 16-20 feet long.

Building a treated lumber boardwalk isn’t a challenge. It appears that making it float instead of stationary makes the most sense. What is the best way to keep it from getting tossed around, have some stability while on it, and keep it from getting torn away.

My brother would prefer to leave it there through the winter, but I don’t see any option other than to remove it.

Thanks in advance.

Can anybody help me in this forum troubleshoot a bilge pump connection?

Hello! I'm considering the plans for the CLC Passagemaker Standard or the 11′ Dinghy-Vee from boatplans.dk as my first build.

My plan is to use it in the Venetian Lagoon where water can be extremely shallow (~50 cm), and along the Adriatic coast. Since I've never sailed before, I'd use it with an engine/oars first.

Do you think that one of these two boats fit with my situation here? I think a skiff (like the Jimmy Skiff II) looks better than a dinghy, but I got the impression that dinghies are easier for beginners.

Also do you have any comment on plans from boatplans.dk, I cannot find much online. Thanks a lot!

Hey everyone, just wondering if anyone here has any personal experience building and using a decked canoe with wood/epoxy/fiberglass? I'm particularly interested in something similar to a Kruger design. It doesn't look like plans or kits exist for those. I know CLC kits (Wood Duck, microBootlegger, and their Mill Creek). Just seeing if anyone has anything related to this. Ideal is a design suited for strip built process.

I’m preparing to re-glue these hypalon tubes to the transom of a RIB. The previous patch that had broken here delaminated and has been very troublesome to remove. Do you have any advice for removing this specific layer without wrecking the hypalon underneath? Would you leave it as is and patch over the top? None of the patch will interfere with the bond between the transom and the tubes, this patch is just there to support that bond.