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Old 19 April 2013, 17:42   #11
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Are you sure?
Had to to it on my Twatsoo a couple of years ago when the trim pump failed. But I did strip it down, drained the fluid, etc.
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Old 19 April 2013, 17:53   #12
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No, I checked them all with a meter. That would be too easy eh?
A random ask, but did you check the fuse located IN the engine itself...?
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Old 19 April 2013, 19:35   #13
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Thanks for the advice guys. I had checked the battery isolation switch on the meter and it seemed OK. Also all the other electrics on the boat work OK.

I did not see any fuse in the engine, maybe I need to take a closer look.

I tried taking a few of the bullet connectors apart and pushing them together again, but no luck so far.

I'll try tracing the power to the engine as suggested and see from there.

I'm not keen on tilting the engine manually unless I have to. I need to sort the electrics in any case.
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Old 20 April 2013, 03:58   #14
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I did not see any fuse in the engine, maybe I need to take a closer look.
I'm not familiar with your engine, but I'd have thought it should? Someone here will know...
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Old 20 April 2013, 14:24   #15
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Well following all your good advice, I tackled it again today. It turned out it was in fact one of the fuses on the engine. There is a 30a fuse hidden behind a covering panel, and with typical Japanese thoroughness, there is not only a little tool in the cover for removing the fuse, but a spare fuse in the fuse holder.

I replaced the fuse, and everything came back to life. I have two slight remaining worries:

1. Why did a 30a fuse blow? It should take a huge current surge to do this. Could I have accidently touched a wrong connection on to the battery?

2. When I came to tilt the engine, it started tilting fine, and then seemed to gradually run out of power, eventually stopping. After leaving it for a few minutes, and trying it again, it did the same again, starting fine and then stopping. The boat has two 85ah batteries, and I checked the voltage on them. Around 12.6v with no load, dropping to around 12.3v when I was operating the tilt mechanism. It may be better with the engine running I guess.

In any case, many thanks again for all the good advice, and especially willk who asked the right question.

So it looked a perfect RIBing day today, and I was in a barn looking at a multimeter. Livin' the dream eh?
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Old 20 April 2013, 14:49   #16
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and especially willk who asked the right question.
...well, I was bound to get one right EVENTUALLY.
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Old 20 April 2013, 16:23   #17
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12.6v sounds like the batteries are a bit low, or maybe goosed. It's worth trying to charge them.


Also, check your trim motor isn't getting hot. It could be a faulty trim motor pulling lots of power that's caused the fuse to blow.
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Old 21 April 2013, 04:34   #18
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I know it may sound rather too obvious but are the battery connections clean? I had something similar happen to me a few years back and all that was wrong was a corroded battery terminal. These things get overlooked and salt water kills em all.
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Old 21 April 2013, 18:12   #19
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I know it may sound rather too obvious but are the battery connections clean? I had something similar happen to me a few years back and all that was wrong was a corroded battery terminal. These things get overlooked and salt water kills em all.
I think the battery terminals are ok, but now you mention it, I was a bit worried whether the cable coming from the negative clamp was a bit. corroded. I'll try unscrewing the clamping screws to have a closer look. It's likely to be next weekend before I will be able to get there again. Gotta go to work :-(
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Old 21 April 2013, 18:34   #20
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12.6 when not running is fairly well fully charged I.e 100% is 12.65 volts....
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