Search results

I picked one of these up a while ago with plans of building a miniature version. They were known for being an inexpensive very (some what) reliable early outboards and have a large diehard following. They were manufactured in what is now my hometown of Poole, Dorset. UK. Just lately my interest...

Hoping to get some advice on what material I should make this model Diesel engine fuel tank out of. I have a resin printer but not really confident that the resin would hold up over time. Looking to machine one up. I wonder if anyone here has had experience with this. Thanks

I am contemplating building a big block Chevrolet V8 for my next project. Kiekhaefer and Mercruiser used these Can Am style injected engines in offshore powerboats and that is what I plan to build. I want to include lots of detail and have decided on a scale of 3.5 to 1. Between 1/4 and 1/3rd...

A friend looks after this car at Goodwood. A Curtiss engine I think. Pushrods pull down on the intake valves. Thought it was interesting!

I see the Midlands event is still on for October. Any others that people know about? Many cancelled still from Covid.

This build is going to be a complete flash steam powerplant for a boat. Its been a project that's been rattling around inside my head for a while now and I need to do something about it so here goes. Rather than pull something completely out of fresh air I have decided to start the project...

Brass sheet is o.4mm. Item is part of an exhaust heat shield for my little GX engine. Moulds were resin printed. I'd seen something similar on youtube but not with resin. The outside form is recessed and epoxied in aluminum for strength. Very pleased with the result and I thought it was worth...

I've been using my Resin printer for quite a while now. I must say I much prefer to print without supports if possible and straight on the build plate. A recent part I printed was a valve cover for the little Honda GX I'm building. I drew it up in Fusion 360 and shelled the inside. I am using...

I am contemplating a small CNC setup for my hobby shop in the UK. I think seeing as its only going to be for my model engine building a machining area of about 250mm would be large enough. I used to own and run a Fadal 40-20 for many years in America. I found a Fadal 15 a month ago here but was...

Probably biting off way more than I can chew here but I'll make a start and see how far I can get. With my first engine pretty much complete and running (Seal Major 30cc) I'm up for another challenge. I've built 100s of these little Honda engines over the years and have literally thousands of...

Irvine 1750 jetstream? I found this one but cant find any bore specs. Any advice on what bore should I be looking for for this size engine and where I could find suitable carbs. Thanks I'm in the UK

Building the Seal Major I had polished the crank journals to finish size with cut off strips of wet and dry, Yes I could have used emery cloth which may have worked better but the W&D was on hand in many grades finishing in 2000 grit. On inspecting the polished crank closely you could see waves...

I've done quite a bit of research on case hardening and understand the process but having never tackled it before can anyone please give some pointers. My biggest worry I think is distorting the shaft severely and having a none usable component. The Kasenit has been on my shelf for 20 plus...

I'm at the point where I need to make rod bolts for the Seal Major I'm building. I could go with BS1407. Make the bolts and heat treat or make them out of stainless which of course is softer but quite tough. The valves on this engine are stainless and threaded. It appears the stainless would...

I'm building the 30cc Seal Major engine which I plan to install in a boat. Because the engine will be working under load I want to be sure of getting the correct piston clearance from the get go. This is what I have and what my thinking is: Piston material supplied in Hemmingway kit; Pretty sure...

After my post on finishing crank journals for the Seal Major 30cc I got looking at grinding. I plan on putting this engine to use in a boat also I have plans to build more high performance engines so hardened steels will be required. Nothing much was popping up on Ebay and what was was in a...

I will be doing some thread turning soon, Is this leadscrew for the scrap bin. As a thought could this 4 1/2 inch bad section be moved by shifting the leadscrew towards the gears and extending the other end with drill rod? I cant see I will be ever threading down that far to the tail end. The...

Moving along with my Seal Major 30cc build. I have the crankshaft partially machined and the journals oversize. I am not sure what steel is supplied with the hemmingway kit but it is good and tough. I am machining on a small Myford. Is there a specific carbide insert which works particularly...

Being very new to this field I would like to know what do you consider is acceptable quality when receiving castings. I returned the top casting that was generally not bad but had some porosity in the barrel area which I was worried that after machining it could break through. I returned it and...

Early days on the Hemingway kits Major Seal 30cc designed by Edgar Westbury. I've been involved in many machining projects over the years and have a background also in boat building but this is my first time building an entire engine from pretty much scratch. Being mostly self taught this might...