RCV 91-CD compression?  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> RCV Engines Support >> RCV 91-CD compression?
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RCV 91-CD compression? - 7/5/2007 10:51:25 AM   
justy_123



Posts: 28
Joined: 3/31/2004
From: Adelaide , AUSTRALIA
Status: offline 		Hi RCV Engines.

I just bought the 91cd engine last week and so far the engine has been run-in for 1.5 hours on a test stand. The engine runs really nice and sounds great but I have a question.

This is my first 4 stroke and I am just wondering about it's compression. For some reason I am able to turn the prop quite easily over the compression stroke. I can feel slight compression but its pretty weak compared to my 2 strokes where its an effort to move the prop over compression. I have tried with the Carburettor closed and also open but the compression still seems to be low.

It's weird because after the prop is rotated 5 or so times the next compression stroke is felt quite good.

Is this lowish compression normal for a 4 stroke and to also be inconsistent?

Please let me know because I am slightly concerned.

Thanks

Justin.

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CRUUUUNNNCH "Ohh, is that why they tell you to carry the tailplane in front of you?"
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RE: RCV 91-CD compression? - 7/5/2007 4:02:03 PM   
RCV Engines


 

Posts: 511
Joined: 4/11/2002
From: WimborneDorset, UNITED KINGDOM
Status: offline 		Hi Justin

Thank you for your query.

I have spoken to our Chief Technican who has advised me that our 91CD compression tends to be lower that a poppet valve 4 stroke engine, due to the rotating cylinder and that you should not be concerned.

I hope this information is helpful.

Thank you and kind regards

Stephanie


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Technical Support
RCV Engines - UK

(in reply to justy_123)
       Post #: 2

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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> RCV Engines Support >> RCV 91-CD compression?
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