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[rob1962]

Hi, Built my Cheddar( Stuart) Puffin engine 13 years ago and it just sat in my basement installed it in my Krick Victoria last year put in in the water yesterday got a perfect 17 minute run on the pond  refueled and next runhad very little power everthing so far looks tight,also dont think it is a pressure issue engine started first run on 18 Psi now it gets up to 30 psi and barely idles anyone have any info thanks oh yes and Hello im new here.

[john s 2]

Is everything free to turn? Your boiler may show ok pressure. But is full pressure getting to the Engine? Is the steam Valve working Correctly. Has any debri come out of the boiler and is blocking pipework on in engine? all this should be considered.Good luck John.

[gondolier88]

Hi Rob,

It might be worth checking the o-ring seals on the pistons after being stood for 13 years.

Greg

[steamboatmodel]

Check that the propeller shaft is turning free. I had one model that would run fin all summer but when the temperature dropped in the fall the grease in the prop shaft would turn to concrete and slow things down.
Regards,
Gerald

[Martin (Admin)]

May also be worth checking your pressure and water gauges are working correctly too...

[rob1962]

Thanks for the speedy response guys ,I will check everything next free chance i get and report back here thank you.

[HS93 (RIP)]

I would go with Gerald , remove the coupling and see how it runs, also you can get a full set of O rings very cheap Of Jerry at Clevedon Steam http://stores.ebay.co.uk/Clevedon-Steam. he is ex Cheddar engine builder

Peter

[Rob1962]

Sorry took a while problem was and currenly is again the Trunnion pin keeps comeing loose loctite does not seem to do it any hints to what might else cause the trunnion pin to keep loosening ?? thanks.

[john s 2]

Locktite comes in various grades , Nutlock, Studlock Bearing fit etc. Im not totally sure of its heat range .This infro may be on the bottle or useage leaflet or their website. Beware that the stronger grades are not meant to be undone easily. John.

[Circlip]

Is the hole in the crank disk drilled truly square? Same applies to hole on con rod ends and stroke of piston assemblies. If the rods are trying to run at an angle to the valve faces, the pin is being loaded obliquely and will stress the glue joint by trying to make the pin wobble.

   Despite being so simple in operation, Oscillators need precision construction.

  Regards  Ian.