07 Tohatsu TLDI 50 Trouble lights

[fe1]

I have a 07 Tohatsu 50 TLDI, when at full throttle all 3 trouble lights come on but when throttle is let off some they go out. Had new water pump installed thinking that might be the problem but NOT the problem. Any suggestions?

 

[pvanv]

If you want to diagnose the motor yourself, grab your Factory service manual as a guide, put the motor in diagnostic mode, and let it tell you what it sees is wrong.
What is your actual model (not year)?
Is this a tiller or remote motor?
Are there any other symptoms, aside from the indicator lamps?
How long has this been happening?
Have you carefully inspected all wiring connections (especially grounds)?

 

[fe1]

Paul, Thanks for the reply.All I have is the owners manual. No service manual.The O.M. states to take it to a dealer. I really would like to diagnose it but know how. It is a tiller modle MD50BEFTO. It has had a temporary loss of power a couple times but immediately picks back up.It started in the last couple trips out.I have looked at it over but dont see anything. I'd rather not use the one dealer we have local the other dealers are several hours away.
It has always pumped water so I dont suspect it was ever to hot. A couple times the hot water light and alarm went off when idling at very low speed for extended time. I shut it down immediately and restarted as OM states and it stayed off.

 

[pvanv]

If you prefer to work on this yourself, get a copy of the Factory service manual from any dealer: Part #: 003-21050-3, List Price (MSRP): $50.00

You will also want a tachometer, and an analog (not digital) multimeter.
TLDI technology is not particularly "shade tree mechanic" friendly, but with the proper documentation, decent tools, and average mechanical ability, you can tackle it.

On page 40 of the OM is a clue as to what might be wrong. Have you reset the TPS initial setting yet? If not, that may cure the problem.

 

[fe1]

How do I reset the TPS. There is no visible damage to the prop as stated on page 40 and as far as I know the ESG has not been activated.
I replaced the plugs and the existing plugs were tan on about 1/4 of the side of the ceramic and black on 3/4.The plugs installed at factory are under gapped according to O.M. but thats the only plugs thats ever been in it and its run fine since new. Should I gap the new plugs the .031-.035 as stated in O.M. or to the same gap as the factory installed spark plugs?

 

[pvanv]

You must be at dead idle before starting.
If you have the OM for the 50B2 (as opposed to the 50B), that information is on p52... you must be at dead idle before starting.
If not, the ECU can read the partially-open throttle position incorrectly, throwing off the initial TPS setting. If that is the case, your actual throttle plate position will be different from what the ECU is expecting, and odd warning lamps can come on, as well as other operating issues.
The correct plug for the 50B2 is NGK IZFR6Q; for the 50B, it's NGK PZFR6H; gap is 0.8 mm, which is about 0.031-0.032" (call it a "tight .032).
Full info about resetting the TPS is in the Factory service manual.

 

[fe1]

Its a 50B

 

[pvanv]

Its a 50B

There is a box of info on p40 of the OM: http://www.tohatsu.com/tech_info/own_man_pdfs/Toh_40B_50B_70B_90B_115A_TLDI.pdf
That explains why the throttle must always be at idle when starting.

 

[fe1]

Is resetting the TPS for the 50A the same as 50B? I ordered a service manual for a 50B and found a service manual (PDF) online for a 50A. Tohatsu is closed for inv until Thursday so will probably be mid next week before I get it..BTW my O.M No. 003-11075-7 is different from the one in the link.

 

[pvanv]

Tohatsu Factory service manuals are copyrighted, so are not available online.
Yes, the procedure for resetting the TPS is the same.
Your OM is an earlier revision.
Several dealers will have the Factory service manual on the shelf to ship out today (I know Obersheimer's in Buffalo should have one), or you can get Tohatsu to ship one to a dealer who is out of stock tomorrow.

 

[fe1]

Replaced the spark plugs with OEM plugs and NO MORE TROUBLE LIGHTS or other problems.YAHOO