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Old 05 December 2013, 14:46   #11
Country: UK - England
Town: Southampton
Boat name: SMH Rib / War Shot
Make: Ribtec / Scorpion
Length: 4m +
Engine: 10hp Yam / 150hp opt
Join Date: Sep 2003
Posts: 1,903
Originally Posted by Trimix View Post
With any type of engine problem - check the easy solutions first. Ive learned that from lots of wasted time.
Also check the cheap stuff first!

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Old 05 December 2013, 16:13   #12
m chappelow's Avatar
Country: UK - England
Town: yorkshire
Boat name: little vicky
Make: avon ex RNLI
Length: 3m +
Engine: tohatsu
Join Date: Mar 2008
Posts: 2,310
Originally Posted by jyasaki View Post
Be a little careful if you're going to manipulate them while the motor is running, unless you enjoy catching high voltage (won't damage you, but doesn't feel too good.) jky
As Jyasaki just said doesent feel too good ?,
Especially if theres lots of dried up saltwater on the stuff & theres more sparks & arcs than a 1930s Frankenstein movie !,
A pair of plastic or proper Nylon pliers is great for messing about with HT leads even kids plastic toy ones ,
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Old 13 December 2013, 11:24   #13
tonto's Avatar
Country: UK - England
Town: Zummerset
Boat name: irven arlyss
Make: Humber Oceanpro
Length: 6m +
Engine: evinrude 135hp
Join Date: May 2012
Posts: 394
I found it!

Ok, looked at a few things, ordered a new set of plugs, good job too as they were not in a good shape, it looks like the electrode has burnt away, possibly indicating a timing problem.
Also the diagnostics indicated an issue with the crank position sensor, as it was easy, I took it off, and measured the resistance, which at 140ohms indicated it was not good.
When I pulled the leads off the coil, 4 of them were full of white corrosion, and black carbon from arcing.
So a new set of plugs, a new set of leads, some cleaning up of the coil terminals, and a new CPS, and she now fires up great, idles and runs smoothly, next test will be to launch her and see how she handles at speed, and with some revs!
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