Recent content by Swell

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    Old 6hp OMC - problem with idle when hot

    I created a recent thread where I was trying to sort out my lack of idle, and resolved it through correct slow speed needle adjustment. It's a 1968 Johnson 6hp. HOWEVER, although it idles fine when cold after starting, it has real problems idling when hot after a run. The engine has a nice...
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    Floor repair for Eurovinil 265

    I've just acquired a 2.65m Eurovinil inflatable boat and it only has one out of the three floor sections. It's the rear one which is joined to the transom by a hinge. It's easy enough to make the missing 2 sections but I'm looking for advice on how they join together. I'm not sure if the...
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    Old OMC motor - new fuel & ignition parts but won't idle!

    My 1968 Johnson 6hp starts ok and runs fine with plenty of power, but won't idle. It has low-ish compression - around the 70-80 mark - and there is an imbalance between the 2 cylinders, pretty much bang on 10%. It runs well at speed but gets rougher at low speed and idles for a while but then...
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    What's the best way to identify leaks?

    I have a Hypalon inflatable boat from the 80?s, so it?s getting on a bit, but the Hypalon is generally in good shape. I?ve fixed a couple of obvious leaks but both tubes are still losing air, albeit very slowly. I?m struggling to identify where from though, and I suspect it might be seams...
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    Design for DIY wooden floor

    Re: Design for DIY wooden floor I've drawn what's going on with the current floor boards in the image below which shows the floor inflated without the floor board - you can see that the seam ends up out of sight, the current positioning of the board before inflating and where the floor ends up...
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    Design for DIY wooden floor

    I've just bought an inflatable boat, a 13 ft Metzeler Juca. It has an inflatable floor, and came with 2 home made ply floor boards. These have been designed to fit tightly right into the edges of the floor prior to inflating - they fit into the seam where the floor meets the side tubes...
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    Just bought a Metzeler Juca needing repair - is it Hypalon or PVC?!

    Re: Just bought a Metzeler Juca needing repair - is it Hypalon or PVC?! Don't know what happened to the link - here's that image again - it gives a good idea of the material near the top of the pic:
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    Just bought a Metzeler Juca needing repair - is it Hypalon or PVC?!

    Hi all, I've just bought this fantastic old inflatable Metzeler Juca. I?ve posted some photos below. It?s generally in not bad condition, though has had a couple of patches, and I?ve found 2 further leaks. It was sold as such and the price I paid reflected that ? I like a project! However...
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    Old OMC motor - problem with hot starting - please help!!

    I have a 1968 Johnson Seahorse 6hp which cold starts pretty reliably after around 3 pulls. However, if I stop the motor after a run of say 20 minutes i.e. enough time for it to fully warm up I have a hell of a job getting it started again. It goes eventually but only after a lot of pulls. I...
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    Setting the points gap - how critical is it?

    I'm setting up the ignition on my 1968 6hp Johnson Seahorse and just wondered how critical it is to get the points gap exactly right. It would appear that there are 2 methods: 1. setting the gap at maximum opening to 0.02" 2. using the timing tool to set the opening to occur at the right time...
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    Spark testing

    I've been testing the spark on my 1968 6hp Seahorse using a homemade spark tester which tests the spark from both cylinders at the same time. The gap is 1/4" for each and I get an intermittent spark for both cylinders. The harder I pull the starter, the better the spark, but it is still...
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    6hp Johnson 1968 fuel pump mounting bolts - wrong ones fitted!

    Can anyone let me know what the correct bolt / screw size is for the 2 bolts which fix the fuel pump to the powerhead? It looks like a previous owner has fitted bolts with the wrong thread and too short. Thankfully just the first 3mm or so of the thread on the powerhead has stripped and...
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    Fully serviced outboard - still won't work!! Please help!

    I've recently replaced a number of key parts and completed a full service on my 1968 Johnson 6hp, but it still has major issues! I've replaced the coils, points, condensers and wires to spark plugs, fitted new spark plugs, new head gasket, re-surfaced cylinder head & intake manifold, new...
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    Where to use gasket sealer??

    I'm rebuilding a powerhead and am wondering if it is necessary to use gasket sealing compound on any of the mating surfaces where a gasket is used? I've re-surfaced all the associated mating surfaces. I'm specifically looking at gaskets for: - reed valve cover / plate - head gasket -...
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    Oil drain leaf valve - which way round?!

    I'm servicing my 1968 6hp Johnson seahorse and am confused as to which way round the oil drain leaf valve needs to sit and how to measure the clearance. The leaf valve has a slight bend in it and it is clear that if it is mounted with the bend inwards, the valve is permanently closed, but if it...
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