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Old 10 June 2003, 11:24   #11
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OMC fuel flow problems

Stewart,

The fuel system is set up as follows
Engine
Pipe
Primer bulb
Pipe
Diesel/water seperator
Pipe
Bayonet Connector
Pipe
Tank
Obviously I change the tanks as i go.

The collapsed section of the bulb restricted the pipe bore to about 1/3 of the usual bore.
Do you think thats it or should I keep hunting?
I may replace the bulb regardless for peace of mind.

Chris
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Old 10 June 2003, 11:56   #12
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Re: Re: Engine cut out

Quote:
Originally posted by Alan


fuel flow problem was that it burned around 15gph at WOT!!
Hey Alan, that's worse than me:
50 liter = 10.9984624 gallon [UK] per hour per engine, that's doing about 38knts....4200revs
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Old 10 June 2003, 12:07   #13
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The Johnson 150 GT VRO

The engine was a Gulf import '87 model Johnson 150GT VRO which were legendary for their ability to consume petrol. An engine designed from an era and land of cheap petrol! Its ultimate demise and replacement with a 150 Opti was the cause of great celebration!
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Old 10 June 2003, 14:05   #14
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One of the things I would check is the breather on the tank - if the bulb is collapsing then the fuel pump is sucking ok, but if the breather isn't ok then it's trying to create a vacuum!

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Old 10 June 2003, 15:03   #15
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Quote:
Originally posted by Cookee
if the bulb is collapsing then the fuel pump is sucking ok, but if the breather isn't ok then it's trying to create a vacuum!
Nail, Hit, Head, If the bulb is deflating there is a blockage tank side of bulb. As Cookee says, either breather, collapsed fuel pipe or maybe a cloggage in the separator/filter. As it sounds very knackered, I'd sell the engine and boat off cheap. I may know a buyer.

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Old 10 June 2003, 17:45   #16
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If the collapsed bulb is reducing it by that much I would imagine it is definatly that, as others have said, if the bulb is compressed it has some kind of blockage or breathing problem.
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Old 10 June 2003, 18:09   #17
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Sounds like a fuel air vent partial blockage problem ! Should be easy to solve.

Best wishes,

Stuart
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Old 11 June 2003, 05:37   #18
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OMC fuel flow problems

The breather on the tank is OK. I ran it last night with no problems for an hour up the Thames at full chat.
The fuel line blokage seemed to be the problem.

I pity David Manning if he sells his boats every time he has a minor problem!

Chris
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Old 11 June 2003, 05:58   #19
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Re: OMC fuel flow problems

Quote:
Originally posted by CJL
I pity David Manning if he sells his boats every time he has a minor problem
Sorry, I didn't know you were supposed to mend them yourself. You could have told me before as I'm just about to buy my 987th boat

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