Yamaha 3.5AC. Help please.

[Dave_Snelson]

My little Yammy got flipped upside down on Saturday when a storm blew in to Porthmadog (and probably everywhere else in the UK). I have washed the salt off and then stripped the motor and it all went together OK. Carb stripped and cleaned, petrol tank flushed twice. Put it all back together will plenty of WD and lo and behold it ran. Left it running for an hour, then switched it off and let it cool.

Could I restart it? No. Nadda. Nothing. No spark at all. I even put an allen key in the plug cap and held it while I cranked it over - nothing at all. Not even a tingle.

Clearly something has happend to either the LT or HT side. The coil is sealed, so more likely LT.

Any views from the learned panel please?

I liked my little yammy /forums/images/graemlins/frown.gif

 

[jerryat]

Hi Dave (again!)

The best solution to total immersion is to immediately (or literally as soon as possible) dunk it in fresh water. I know it sounds crazy, but it is the best way. My previous Mariner 2 (same motor) came through no less than three duckings and still worked perfectly.

I used to hold it upside down (having emptied the fuel tank) in a drum of water and heave it up and down for several minutes. This washes the salt water out of just about everything. Put the engine on a stand, remove the spark plug and pull the starter cord to push any water out of the cylinder. Empty the carb. and dry the outside of the engine.

I then used a hot air gun, used very carefully, to warm up the whole motorhead to a reasonable temperature. Refill the tank, re-insert the plug, and start the motor.

This whole saga didn't use to last more than half an hour, and on each and every occasion, the motor started within a couple of pulls, and ran sweetly thereafter.

I suspect that you still have salt cystals adhering to some of the circuitry, and washing with water (or stripping down and manually cleaning if possible) may be the easiest solution. You could try WD40, but may not be able to get it where it's needed.

Others will no doubt offer other solutions, but this method works for me and my friends.

Hope all gets sorted,

Cheers Jerry

 

[Kawasaki]

Shame for the little Yammy. If water has got in the flywheel ,there,s a chance of prob,s on the LT side. The HT coil will stand a a little dunking usually. I would double check with a new or" known good"spark plug, remember to "earth" the plug against an unpainted bit of the motor, if you didn,t do this with the allen key method you won,t get nothin,. Follow the LT wire from the coil back to loom area pull it out of its connector ,male ,female thingy see if that,s good and dry.You mention it ran for a bit, take the fuel cap off,no I,m not suggesting it,s run out of petrol! Got one going last week which had visited the Dock and found gunge in the fuel cap breather which stopped it running after a bit . Anyway if you,ve definateley got no juice to the coil can you wiss the flywheel off to get at the iinside ? Try the "hair dryer"method into the flywheel area ,might work but I usually end up taking the lot off! To eliminate the coil so yer know it,s LT, whiip it off to the local boat mender or motor bike shop they should be able to test 6 volt coil if thats ok you know it,s inside the LT Dep,t What year is the Yammy by the way? Iechi Da! Kawasaki

 

[Dave_Snelson]

Hi Kawasaki - don't know its year. I find it odd that the motor ran for an hour in a water tub, but when I stopped it (fuel cap not bunged up) it wouldn't restart having cooled down. I did earth the plug against the metal of the cylinder and no spark, thats when I earthed it against me, to see if I got even a faint jolt off it - but nothing.

I'll have to get the flywheel off and see. You don't happen to know if these things have breaker points do you? Or is all electronic?

Thanks anyway.

 

[Kawasaki]

Yeh the jerryat methods a bit late now, would have flushed out any jelly fish as well! Don,t think it,s got points, that,s why I wondered what year the motor was. Will have C.D.I type leci unles it,s pre mid eighties. Like you say even more stange it ran in the tub for so long. So if the coil checks out ok it,s flywheel off clean and reasemble and ring de ding dingding ding ding, like the f**n frog ,hopefully!

 

[tico]

My ones got points located under the flywheel. Oly prob is that the cam is on the flywheel so makes it a [no thanks] to set the pointscoz the little window doesnt line up well. Chances are that theres still some salt in there, so whip the flywheel (with the help of a large puller and big hammers) and clean it out.
Bestof luckl!!