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14 June 2010, 08:44
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#1
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Member
Country: France
Town: Côte d'Azur
Boat name: Beaver Patrol
Make: Avon Searider SR4
Length: 4m +
Join Date: Jan 2004
Posts: 5,934
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Yamaha 100hp trim issue
A friend of mine has just bought an Avon 560 with this on the back. It's got an issue with the trim I'm trying to sort out. The engine tilts fine, until you tilt it all the way up. When it goes all the way up it refuses to come back down again. (Unless you release the emergency tilt screw) It's most odd!
Can anyone gives me any clues what could be going on here. I've made a short video of it: the first noise it trimming down, then up, then down again:
[YOUTUBE]DT1Bm8_J3do[/YOUTUBE]
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14 June 2010, 16:06
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#2
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RIBnet admin team
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 13,069
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Quote:
Originally Posted by Tim M
A friend of mine has just bought an Avon 560 with this on the back. It's got an issue with the trim I'm trying to sort out. The engine tilts fine, until you tilt it all the way up. When it goes all the way up it refuses to come back down again. (Unless you release the emergency tilt screw) It's most odd!
Can anyone gives me any clues what could be going on here. I've made a short video of it: the first noise it trimming down, then up, then down again:
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Have you checked the fluid level? If it's low the pump will cavitate and spin in foamed fluid at full tilt.
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14 June 2010, 18:24
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#3
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Member
Country: UK - England
Town: Southampton
Boat name: Hissing Sid
Make: Ross Smith Cobra
Length: 6m +
Engine: 200HP Optimax
MMSI: 235038046
Join Date: Jun 2002
Posts: 3,804
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Quote:
Originally Posted by Nos4r2
Have you checked the fluid level? If it's low the pump will cavitate and spin in foamed fluid at full tilt.
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Would be my first port of call aswell.......
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14 June 2010, 18:32
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#4
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Member
Country: France
Town: Côte d'Azur
Boat name: Beaver Patrol
Make: Avon Searider SR4
Length: 4m +
Join Date: Jan 2004
Posts: 5,934
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Haven't had a chance to have a proper look at anything yet. I did consider fluid level but assumed that if there wasn't enough in there it wouldn't have gone all the way up in the first place. Will have a tinker in the morning
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14 June 2010, 19:53
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#5
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Member
Country: UK - England
Town: Gloucestershire
Boat name: Osprey
Make: Osprey Vipermax
Length: 5m +
Engine: E-tec 300 G2
MMSI: TBC
Join Date: Dec 2006
Posts: 4,021
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Quote:
Originally Posted by Tim M
Haven't had a chance to have a proper look at anything yet. I did consider fluid level but assumed that if there wasn't enough in there it wouldn't have gone all the way up in the first place. Will have a tinker in the morning
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deffo fluid level as you tilt up the cylinders are filling up and when the reservoir empties there is no fluid left for the pump to suck in to start the return trip Down.
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Chris Stevens
Born fiddler
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14 June 2010, 21:08
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#6
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Member
Country: UK - England
Town: Surrey
Length: no boat
Join Date: Feb 2009
Posts: 215
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trim
your PISTON SHUTTER valve that allows the fluid to return is your PROBLEM . The valve is not coming off the seat . HAD alot of probs with this issue . I BET your engine is a F100A
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14 June 2010, 21:28
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#7
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Member
Country: France
Town: Côte d'Azur
Boat name: Beaver Patrol
Make: Avon Searider SR4
Length: 4m +
Join Date: Jan 2004
Posts: 5,934
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Quote:
Originally Posted by outboardtech
I BET your engine is a F100A
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Correct 
Having looked through the paperwork for the boat this afternoon it would seem this engine has suffered with this problem several times before.
What's the fix for this?
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14 June 2010, 21:32
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#8
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Member
Country: UK - England
Town: Gloucestershire
Boat name: Osprey
Make: Osprey Vipermax
Length: 5m +
Engine: E-tec 300 G2
MMSI: TBC
Join Date: Dec 2006
Posts: 4,021
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Quote:
Originally Posted by Chris
deffo fluid level as you tilt up the cylinders are filling up and when the reservoir empties there is no fluid left for the pump to suck in to start the return trip Down.
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Ok perhaps not then 
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Chris Stevens
Born fiddler
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25 June 2010, 14:17
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#9
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Member
Country: Ireland
Town: clifden
Boat name: outbound
Make: avon 6m\ osprey 6,25
Length: 6m +
Engine: outboard suzi df140
Join Date: Sep 2009
Posts: 42
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yamaha f 100
the fix for this is to replace valves, the big screw at t bottom of t ram facing you and the other one is behind it , prop up t engine end loosen t trim unit and get it from t back, worked for me 4 years ago its a common fault, also keep an eye on your regulator they tend to overcharge and can set t engine on fire i have seen this on 2 engines , mine i had changed but it had melted, my friends went on fire but he saved it. good luck
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25 June 2010, 14:56
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#10
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RIBnet supporter
Country: UK - England
Town: Hants
Length: 8m +
Engine: 300hp plus
Join Date: Sep 2007
Posts: 3,072
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Quote:
Originally Posted by outboardtech
your PISTON SHUTTER valve that allows the fluid to return is your PROBLEM . The valve is not coming off the seat . HAD alot of probs with this issue . I BET your engine is a F100A
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As I run a new version of this do I need to do anything? has there been a product recal?
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