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Old 16 July 2007, 06:21   #1
Country: UK - England
Make: Avon Searider
Length: 4m +
Engine: Mariner 50hp
Join Date: Jul 2007
Posts: 16
HELP - Flushing a 3 cylinder Mariner 50hp

Hi There,

I have a 3 cylinder mariner 50hp (Clam shell) outboard. Unfortunatly I can't find a big enough barrel to flush the outboard in as it is fitted with hydrofoils. I went out and bought some flush muffs. However, the engine will start fine when the whole boat in in the sea but it will not start when only the flush muffs are connected when the boat is on the trailer.

Is this just a fluke or is there a float switch/water sensor in the leg to prevent the engine form dry running?

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Old 16 July 2007, 06:35   #2
Country: USA
Town: boston
Boat name: Miss bad 61
Make: Crapko, AKA Mako
Length: 5m +
Engine: OMC Mod50
Join Date: Apr 2006
Posts: 398

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Old 16 July 2007, 15:51   #3
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Country: UK - England
Town: The wilds of Wiltshire
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 235090687/235055163
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Posts: 12,690
How are you trying to start it? I've never had a problem starting one of those on muffs.

Might be worth sticking a rag into the prop centre to restrict (NOT block) the exhaust a bit to simulate being in water.
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Old 17 July 2007, 09:48   #4
Country: USA
Town: Oakland CA
Length: 3m +
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Posts: 6,653
One other thing: My Honda used to act as if it was in the arctic when flushing in the driveway. Took a lot more choke than when it was in the water (flushed the motor after driving home, so it was out for a good 3 or 4 hours.) Not sure why that was, but there you go.

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Old 17 July 2007, 10:31   #5
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Country: UK - England
Town: Southampton
Boat name: Hissing Sid
Make: Ross Smith Cobra
Length: 6m +
Engine: 200HP Optimax
MMSI: 235038046
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Take the foils off and use one of those blue plastic drums with the end cut off.
You shouldn't have any trouble starting it on muffs tho'.
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