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HelicopterEngines Plugs Mufflers Fuel › OS 91 HZR pump
08-28-2012 07:19 PM  5 years agoPost 1
Terminator

rrApprentice

Atlanta, ga

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Gentleman,

I'm not getting the pressure release from my tank that I once did. I would like to know what your feelings are on, would there be a problem with the HZR PUMP or should I replce the tank first to make sure I don't have a small hole in the tank.

Thanks
Terminator

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08-28-2012 08:36 PM  5 years agoPost 2
LaurenceGough

rrElite Veteran

Reading, UK

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I have heard that the check valves can sometimes fail a new one is easy to fit so I would do that first along with replacing the fuel lines.

www.laurencegough.com
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08-29-2012 01:52 AM  5 years agoPost 3
marc8090

rrElite Veteran

Long Island, N.Y.

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How does it run? If the check valve was stuck the engine would run VERY lean, if at all. If you are not getting the pressure in the tank you used to it either is not building pressure well (check valve issue) or it's loosing pressure (leaking tank or lines). A leak should be easy to spot.

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08-30-2012 09:37 PM  5 years agoPost 4
tad727

rrNovice

Merritt Island Florida USA

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Have a friend that we could not get the HZR to make good tank pressure. We changed check valves fuel line, tank everthing and couldn't make it pressurize the tank good. Finally sent to hobby services, thats another story, after basically rebuilding the thing and re-breaking it in still no change. My hzr motor that always made lots of pressure has stopped making good pressure after new bearings. Even one of the OS reps made a comment about some engines lack of pressure. If anybody knows the fix let us know.

What's it doing now? Oh it's doing that again!

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09-02-2012 12:37 AM  5 years agoPost 5
tad727

rrNovice

Merritt Island Florida USA

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Changed out check valve with an old ys version and runs great and makes good tank pressure. The check valve that was on it was difficult to blow air thru.

What's it doing now? Oh it's doing that again!

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HelicopterEngines Plugs Mufflers Fuel › OS 91 HZR pump
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