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Old 11-29-2017, 07:29 PM   #11
Brian Rupnow
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Originally Posted by wesley View Post
Oh well more problems to get over,how about alloy piston steel liner and then steel round water jacket with copper tank,the water jacket being sealed with o rings to the liner,any thoughts on that way please
I sent you a private email suggesting that you look at my thread about attaching the waterjacket to my Rockerblock engine and sealing it with O-rings. Maybe you didn't get it. ---Brian


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Old 11-29-2017, 07:50 PM   #12
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Hi brian ,no never got that one,will try and find thread on the forum,many thanks for your help with all this.
regards john


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Old 11-30-2017, 02:43 AM   #13
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12L14 steel as a cylinder with an alloy piston and cast iron rings is a good combination, however 12L14 rusts quicker than any other steel I've come across so I wouldn't recommend it for water immersion without coolant. I'm guessing with a boat you wouldn't have a closed coolant system so it wouldn't be appropriate, just adding to you knowledge bank!
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Old 11-30-2017, 05:36 AM   #14
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Thanks cogsy like that,l am intending to make cast rings as l have cast in stock,as for the cylinder l may well now after making that pack it with wet sand an then weld the water jacket to it,if it dont work can always make another one and go with o rings,one thing l would like to do is make the stroke a bit longer ,so l can have a bit longer cylinder to fit the water jacket,bet the skilled engine builders on here can put me right with that one.
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Old 11-30-2017, 11:07 AM   #15
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There is no problem making a water jacket, just tight coil copper tube around the cylinder and you will find that perfectly good enough.
A small water pick up behind the propeller, then up or down through the coil and out through the hull and the job is done.

Why make life difficult for yourself?

You can even get rid of all the electronic bits as well if you can make yourself a magneto

This is my magneto running a friends Webster, a complete lift out package


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Old 11-30-2017, 12:01 PM   #16
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Thats made my day ,people on here are very kind with there help and advice,many thanks
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Old 12-03-2017, 10:03 AM   #17
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Have been given a set of plans to make the Howell 2-jet throttle carb,have many builders on here have built this carb,the build plans look very good nice an clear etc.


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