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Old 22 March 2011, 06:46   #11
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Service kit turned up in the post last night. I'll strip the fuel pump again and change all the innards fingers crossed it's all good.

Thanks for all the advice
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Old 22 March 2011, 07:02   #12
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Sorry to here about your problems. You are not the first to put a tear in your boat at that slip with those style trailer board fittings and you will probably not be the last.
I hope this weekend goes better.

Keith
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Old 02 April 2011, 15:19   #13
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Been out today knott end to Piel island approx 10 miles in a moderate sea no problems at all, (fuel pump serviced). Stopped fir a pint, on the journey back I switched to my reserve tank to use some of the fuel and the same problem occurred, switched back to the main tank same problem loss of power and then stalls deffo fuel.

When I went to pump the bulb no fuel at all and it was difficult to pump, squeezed ok but really slow to inflate to allow another squeeze.
Both tanks are vented deffo all I can think now is there is something wrong with the switch between the tanks, I'll strip it but i can't make sense of how I can travel for 40 mins or so all good and then restart and struggle again, weird.

Any thoughts welcome i have checked all joints and pumped as much fuel thru out if the water via the bulb as I could can't see a leak anywhere

Perplexed
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Old 02 April 2011, 18:42   #14
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How about just borrow or buy a new portable tank whit new bulb/lines. If that works OK for a few hours then You know for sure its not the engine or the connections there?
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Old 05 April 2011, 15:00   #15
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Ok, I'll deffo rig the spare tank so it can be run separately, different fuel line and bulb. In the meantime though I've separated all the components.

The way I'm set up is:

From the outboard one fuel line to a three way switch. From the switch one line to the main fuel tank, one to the spare.

Its all dis connected now. If I blow through the main line to the switch, I can blow into the main tank, only, in the off position can't blow, and in the other position I can blow into the spare tank.

Blowing down the fuel line from the spare tank, no obstructions, all good.

At the end of the line between the outboard and the switch, obviously there is the bulb, and that is fine, I can only blow one way, and its the right way, took it off to do this. But I also have this at the end, see pictures.

With the grey part off I can blow through the line, but there is a lot of resistance, connected I can't at all, as I guess its supposed to work.

So question is, could this be the problem, and before I re connect all back up, is it better to leave this out of the system and simply connect the fuel line directly to the bulb?
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Old 05 April 2011, 19:20   #16
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Get rid of that horrible plastic fuel connector-they are bloody awful- and either replace it with the cast alloy version or connect directly to the bulb.It wouldn't surprise me if it wasn't that causing an intermittent air leak.
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Old 06 April 2011, 04:29   #17
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Neil I agree with Nos4r2 and as per my previous post; connections were my issues and know doubt with perseverance you will crack it!!
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Old 06 April 2011, 12:25   #18
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Fuel starvation

Sounds like classic fuel starvation.
I've had this as well both on a Johnson 115VRO and a Merc 90. It was drawing air so check your hoses for perishing and air tight connections at the tank, bulb,engine connection,etc etc as that was part of my problem.Both boats have fixed 80 lt tanks. The Merc was worse.
The other thing that was also a factor on the Merc was the throttles were not synchronised and the slow running jets were all to cock,not worn, but out of sync. Also found water in the float bowls so that gave erratic running and the Merc engine was a pig to start. Spent all last early season faffing about and went back to basics and hey presto, now working and no probs at all at WOT. Also as an after thought make sure that there is no air entering that is not metered.Yep carb gaskets but I suspect elsewhere before taken the carbs off.
Meeko
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Old 06 April 2011, 12:33   #19
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Fuel starvation

Just seen the photos of your fuel line. Are they plastic and if so they harden in petrol as you know and then leak air like a collander. I would be very very sus of these connections and change them to something more simple. I've had experience of these connectors and they are problematical. O rings and non return valves!!!!!!!!!
Get some good quality rubber fuel line.It doesn't harden,can be crimped with Tie Wraps and seals air tight. Just because you don't get a fuel leak doesn't imply its air tight and remember your pump relies on suction as well as pressure.
Hope it helps
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Old 07 April 2011, 03:26   #20
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agree with Nos, change the plastic ones to alloy version, also check out you fuel lines, they can collapse inside and will only alloy very limited fuel through, just blowing down the pipe will not highlight an issue inside.

Just a thought, (without reading it all) in the fuel tank perfectly clean inside and the pickup is unobstructed?
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