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Old 14 January 2011, 09:18   #1
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Tohatsu 30 2 stroke won't start

Long over due i have put my motor back together and went to fire it up, but nothing. It seems i am not getting any spark.

There are 2 black wires which by normal wiring colours i am assuming are earth wires.
One comes from the CDI module and ends with an o-ring terminal. The other is a short wire which has an 0-ring terminal at either end. I have tried basically every combination that i could think of, but still nothing...

If anyone has a Tohatsu 25/30, could you please post a picture of your CDI and coil pack so i can see if i have got something wrong.

Or alternatively if someone knows where these wires should be connected could you please tell me.

Also, do these motors have a firing order? I've noticed in other pictures that the lead coming from the top of the coil pack actually goes to the bottom cylinder. Mine is the other way around as that is the only way the leads will reach...

Thank you
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Old 14 January 2011, 14:23   #2
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Originally Posted by Bus_Boy View Post
Long over due i have put my motor back together and went to fire it up, but nothing. It seems i am not getting any spark.

There are 2 black wires which by normal wiring colours i am assuming are earth wires.
One comes from the CDI module and ends with an o-ring terminal. The other is a short wire which has an 0-ring terminal at either end. I have tried basically every combination that i could think of, but still nothing...

If anyone has a Tohatsu 25/30, could you please post a picture of your CDI and coil pack so i can see if i have got something wrong.

Or alternatively if someone knows where these wires should be connected could you please tell me.

Also, do these motors have a firing order? I've noticed in other pictures that the lead coming from the top of the coil pack actually goes to the bottom cylinder. Mine is the other way around as that is the only way the leads will reach...

Thank you

I'm not being rude but check the kill cord...

If it is in and working, then I would say check all wiring and earths again... Check woodruff key on the flywheel... Check you are getting voltage from the pulsar coil... Tough to diagnose without seeing the engine.

Also, Generally the earths should be different lengths and will only/should fit in certain places... same as the plug leads. (If the coil pack is bolted onto the head then the head needs to be earthed too...) Make sure CDI unit is also earthed properly...
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Old 14 January 2011, 16:06   #3
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Would this be of any help? Did You had the engine running before You bought it, CDI failure is one possible cause. Its not a picture taken by me, but same type of engine.
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Old 14 January 2011, 18:14   #4
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Not sure which Tohatsu 25hp two stroke you have but here is a link to all the owners manuals for Tohatsu engines:

http://www.onlineoutboards.com/Owner...html#TwoStroke

Good luck
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Old 14 January 2011, 21:35   #5
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MOS - Yes kill cord is connected

C-Numb - I actually found that picture last night. All though mine differs slightly from that motor, but as far as the wiring mine is wired the same, but still not starting. I've never ran the motor before, i've recently replaced a few parts, but i just assumed that the CDI and coil pack were ok as i was assured the motor was in running order when i purchased it.

In that picture the leads are going to oppisite cylinders as mine, does this matter?
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Old 14 January 2011, 21:46   #6
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Quote:
Originally Posted by Bus_Boy View Post
MOS - Yes kill cord is connected

C-Numb - I actually found that picture last night. All though mine differs slightly from that motor, but as far as the wiring mine is wired the same, but still not starting. I've never ran the motor before, i've recently replaced a few parts, but i just assumed that the CDI and coil pack were ok as i was assured the motor was in running order when i purchased it.

In that picture the leads are going to oppisite cylinders as mine, does this matter?
Have you actually checked a plug for a spark? It'll still spark, even if the firing order is wrong.
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Old 14 January 2011, 22:27   #7
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I swapped the earth wiring around and now i am getting spark. The motor started a couple of times for about 1/2 second and then stopped. There's also fuel coming back out the carb through the intake now...
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Old 15 January 2011, 02:08   #8
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Youtube video uploading of me trying to start the motor.

I pulled the new plugs out and i might be wrong here but shouldn't they atlest be wet from the fuel, or be able to smell fuel on them? The were as through they came straight from the packet, dry, and no fuel smell at all....

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Old 15 January 2011, 03:02   #9
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If you have the M25/30 model, pretty sure that the spark wiring on the picture is correct.
If the sparks are dry despite pulling, guess its the carb or fuel pump?
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Old 15 January 2011, 05:29   #10
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First thing to do is to repair the pullcord. There's no point manually re-threading the starter rope every time. I used to have a mint Yamaha 40V, and it never started on the first or second pull. Normally took 3-4 attempts. Once it was running, it would run all day.

Rule out fuel related problems, such as fuel filter on the engine (clean fuel bowl), the tank is vented, and the primer bulb is hard before starting the engine. Are the spark plugs new or used? You could check the gap.
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