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Old 22 May 2007, 05:57   #1
Country: UK - England
Town: Cumbria
Boat name: RIB
Make: Ribcraft
Length: 6m +
Engine: 100 4 stroke outboar
Join Date: May 2006
Posts: 2
High resistance to engine cranking. Yamaha 100 HP 4 stroke.

Put the RIB to bed last November, and have come back to it now to find the engine won’t turn over. Massive resistance to cranking the engine (by hand & on starter motor) even with the plugs out.
Anyone any ideas what it might be ?

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Old 22 May 2007, 11:47   #2
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
Did you squirt wd40 or similar into the plug holes before turning it over?

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Old 23 May 2007, 05:05   #3
Country: UK - England
Town: Bursledon
Boat name: Mustard
Make: Ribeye 785
Length: 7m +
Engine: Yamaha 200/Merc 6
MMSI: 235068693
Join Date: Oct 2006
Posts: 618
Give us some clues!

How did you prepare the engine for storage?

Did you fog the engine?

Squirt oil into the bores? What type of oil?

Was the boat stored inside or outside?

Were the plugs replaced for storage?

Was the engine oil changed before storage?
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Old 23 May 2007, 05:11   #4
Nasher's Avatar
Country: Other
Town: Principalite d'Chaos
Boat name: The Nashers Revenge!
Make: Ocean & Bombard
Length: 6m +
Engine: Suzi DT200EFI, DT9.9
MMSI: "Mmmmm SI" she said!
Join Date: Jan 2004
Posts: 4,162
I know its obvious, but have you checked to see if its in gear?

RIBBED For extra pleasure.
Member of the ebay Blue RIB cover club.
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Old 23 May 2007, 12:14   #5
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Nos4r2's Avatar
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
Join Date: Jul 2005
Posts: 12,690
What everyone else said-and have you checked the lower unit gearcase for water ingress? It could be a semi seized gearbox.
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