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Old 19 April 2013, 09:30   #1
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Help needed! Dead engine electrics.

Today I went to collect my RIB from my mate's barn, with a view to going for the first run of the season tomorrow. Weather looks perfect.

I connected up the battery, and went to tilt the engine so I could move the boat, and it seems none of the engine electrics work, including the power tilt. This means I cannot move the boat, as I cannot tow it with the engine down

All the other boat electrics work. Sounder, VHF, nav lights and a newly installed chart plotter. But the power tilt, fuel gauge and ignition / starter are dead.

Any ideas where I should start to look? I have wiggled all the connectors I could see. I have checked all the fuses. I did wire up the new GPS myself, but that works OK, and it is hard to see how looping in another accessory could have affected the engine electrics. My guess is that tilting back the console to gain access to the wiring may have disturbed something, but there is nothing obvious.

The boat is an Avon Adventure 560 of 2000 vintage, with a yam F100 four stroke.

Any suggestions (at least the clean ones) gratefully received.
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Old 19 April 2013, 09:36   #2
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Has a fuse blown?
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Old 19 April 2013, 10:10   #3
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Get the multimeter out and check you've gopt power at the motor first, then work your way through the loom. You can test the controls just by unplugging them from the motor and using the multimeter on the multi pin plug if you've got someone there to operate it all.

There's a 703 control wiring diagramme on Ribnet if you search my previous posts.
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Old 19 April 2013, 11:08   #4
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Quote:
Originally Posted by Nos4r2 View Post
Get the multimeter out and check you've gopt power at the motor first, then work your way through the loom. You can test the controls just by unplugging them from the motor and using the multimeter on the multi pin plug if you've got someone there to operate it all.

There's a 703 control wiring diagramme on Ribnet if you search my previous posts.
Thanks for this, and I have found the diagram. It looks like it was for a 50hp, but I guess it will be valid for my F100? Also I took the cowling off the engine, but could not offhand see where the wiring connector is, but I did not look that hard. I am going there again tomorrow. I'll let you know how I get on.

Thanks again.
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Old 19 April 2013, 11:10   #5
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Has a fuse blown?
No, I checked them all with a meter. That would be too easy eh?
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Old 19 April 2013, 12:26   #6
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No worries.
If it's a 703 control, it'll be the same unit. The outboard wiring will be different though.
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Old 19 April 2013, 16:42   #7
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Do you have a master battery cut out switch, these can play up, due to dirty connections inside of switch, if its the type that has a red key that turns,remove key and spray with wd 40 and push key in/out against spring a common prob on our race cars if not used for a while.
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Old 19 April 2013, 16:55   #8
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This means I cannot move the boat, as I cannot tow it with the engine down
If it helps the engine can be tilted up manually if you loosen the manual valve screw counterclockwise until it stops - this procedure will be shown in your owners manual
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Old 19 April 2013, 17:21   #9
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If it helps the engine can be tilted up manually if you loosen the manual valve screw counterclockwise until it stops - this procedure will be shown in your owners manual
That would be a last resort, as you'll need to bleed it afterwards which seems to take forever to purge air.

The fact other electrics are out suggests a damaged or dirty connection.

Could be corroded internal wiring. A multimeter on continuity setting will confirm. First steps are to clean all connections including bullet connectors.
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Old 19 April 2013, 17:34   #10
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That would be a last resort, as you'll need to bleed it afterwards which seems to take forever to purge air.
Are you sure?
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