Tohatsu 40 2cyl fllooded not running?

[red october]

Hi all, I'm new to boats and newish to 2 stokes, fair experience on 4 stroke and diesel.

My 2 questions are;

1. Does anyone know what year it is? Model # 365 01100 1 Crank side? 345 01100 carb side?

2. Recently i had the boat out for a run, I got about 2 hours running time, alls well. Got home started flushing with fresh water. Ran for about 2 min, then just stopped, no cough's or missing. I tried to start but no luck, pulled plugs and found wet with fuel, disconnected fuel, left plugs out, kicked motor to remove excess. Re connected everything, but still no luck.

I left it over night with the plugs out, found a puddle of black oil/fuel under prop / outboard, when I pulled the inspection plate off the air filter i found an inch of fuel sitting in the bottom of filter case.

After draining fuel system and filter case I left it over night again. Then tried it again with no fuel supply, Nothing. Tried spraying fuel through carb then through spark hole, Nothing. Checked spark and am gettin good spark on #1 but intermitten on #2? Plugs are dry now too.

Has the flodding brocken something? or is the spark an issue? On a car engine fuel + spark = vroom, if only briefly, but this has me stumpped.

Thanks for the help iin advance.

 

[Sea Rider]

Re: Tohatsu 40 2cyl fllooded not running?

The flood issue you describe is because engine has stopped suddenly, if plug intermittence, check correct plug gap (1.0 mm) plug caps are in opt state, ignition coil & ignition coil wires ends to plug caps, cd, check all related electrical parts outputs, must have a service manual for that.

Happy Boating

 

[TOHATSU GURU]

Re: Tohatsu 40 2cyl fllooded not running?

1) Your model number is 40C...The 01100 is probably the serial number. Years aren't used as part application is usually determined by the model number. You would need to call Tohatsu at 972-323-6003 to see if they can pin down an actual production year.

2)Intermittent fire on one cylinder will cause a wet plug so, your first step is to determine what ignition part is causing the problem. That is done by testing each part, using the procedures and values, as found in your factory service manual. Service manuals can be found at any Nissan or Tohatsu dealer.

 

[red october]

Re: Tohatsu 40 2cyl fllooded not running?

Thanks a lot for the info.

I was thinking the spark was causing the drama, The leads look old and worn at the plug contact end. Can I change the leads or do I have to change the coil? They seem to be part of the coil.

 

[TOHATSU GURU]

Re: Tohatsu 40 2cyl fllooded not running?

That would be a CD module, not a coil and you can't change the wires...You can change Das Boot at the end.

 

[Sea Rider]

Re: Tohatsu 40 2cyl fllooded not running?

Thanks a lot for the info.

I was thinking the spark was causing the drama, The leads look old and worn at the plug contact end. Can I change the leads or do I have to change the coil? They seem to be part of the coil.

You should start troubleshooting by changing both old plug caps, unscrew both, cut 1/2 cm of black wire so to have new wires portions ends, screw new ones, glue where wire matches caps. You will be surprised by the performance miracle installing 2 new caps. This will be the least expensive way to get rid of that intermittence problem you are experimenting.

PD.If difficult to unscrew because are factory well glued, just cut at the beginning of each cap and screw two new caps. If plugs are old and fouled, change spark plugs too : NGK B7HS-10 or Champion L82-C both tight gapped tip to 1.0 mm.

Happy Boating

 

[red october]

Re: Tohatsu 40 2cyl fllooded not running?

Yeah tried new plugs, Still no good.

I have read in other posts that holding the plug leads to test for spark will give quite a kick yet I can hold mine and have no discomfort, and it is getting a blue spark. should I be getting a more powerfull spark? Would changing the caps get better spark? If so why did they just cause the engine to stop?

I will try to change the lead caps, not sure if there is enough extra lead to reach the plugs though.

I cant understand how the engine has stopped running instantly, normally I would expect something to have burnt out or failed in some way, Instead I have fuel + spark but not running. But then 2 stroke engine electics have me a bit baffled.

Thanks for the info.

 

[Sea Rider]

Re: Tohatsu 40 2cyl fllooded not running?

If old caps are cracked and loosing energy, definitely with new ones will work fine as long as ignition coils are in good shape. Other iussue would be that one of the twin ignition coils is having electrical internal problems, but to test outputs parameters must have the tech manual.

Happy Boating