90 tohatsu TLDI battery requirements

[lots of boats]

Hi.

Tohatsu experts recommend using a 1000AH battery onthe 90 TLDI. These motors will happily run hooked to a lawnmower battery, but I use a 1400AH battery. I think this is because accessories such as VHF or sirius radios, live well pumps, or lights will draw enough power to reduce the voltage in the battery. The charging system will bring the voltage back up, but in the meantime the CPU registers an error. Does any one know how to avoid lugging around 150 lbs of battery to avoid this?

 

[chevyjet]

Re: 90 tohatsu TLDI battery requirements

About all i can say is you should make clearing the codes part of your daily routine, thats what we do and it helps with the running quality. I agree packing 150 lbs of battery is not exceptable in a small boat, you might as well get a 4 stroke.

 

[lots of boats]

Re: 90 tohatsu TLDI battery requirements

Hi,
That is what I have to do too, regardless of whether the TLDI has a 625amp battery, or a bigger battery. Sometimes you don't need to bother clearing the error codes but the lights all start to flash often enough for no apparent reason, sometimes they start flashing a warning as soon as the key is turned, and they never seem to forgive and forget, so I found it was a little less worry to know whether the CPU was reminding itself of past insults, real or imagined, or starting on something fresh, so I cancel the codes frequently. I also found that some battry post lead is much less prone to turning hard and black from oxidation, and easier to keep clean that other types of battery posts and I avoid the ones that have those types of lead alloys.
Cheers.

 

[chevyjet]

Re: 90 tohatsu TLDI battery requirements

Ya thats about all you can do, the supid thing is you should not even need a battery at all. On our new snowmobiles we have SDI transfer port injection and they start first or second pull every time, run all day, never bog after 30 foot jump and best of all have no battery. They also have Det sensers that allow the brain box to save your pistons if you get bad gas or load the engine too hard.
It realy shows how far off the cutting edge these outboards realy are.

 

[TOHATSU GURU]

Re: 90 tohatsu TLDI battery requirements

Both Yamaha HPDI DFI engines and Mercury Optimax DFI engines have to have the same voltage requirements in order to operate correctly. Anyone who finds it too difficult to do the simple maintenance required to maintain a healthy electrical system in their boat should consider going to an Eeeek-tec or perhaps looking into various alternative propulsion systems such as paddling or sail.

 

[lots of boats]

Re: 90 tohatsu TLDI battery requirements

Well thou are correct again of course, with the 90TLDI system, paddling is a viable option not to be overlooked. I keep two oars a paddle and a pike pole handy.

The battery type to be avoided is a common brand, and I may be accused of bashing if I mention it. However, in one of my other systems I have a battery bank, inverter, cross connected cables etc. I recently replaced the battery bank due to age, the new batteries were purchased from a large reputable firm that sold many accesories, solar panels etc., and I mentioned the voltage problems with the TLDI system and he showed me a chart that showed the alloy variation in battery posts. He said he would not sell ones with high alloy content added to make the posts harder, because of the oxidation problems.

The other thing I do is carry a SS brush in the tool box to keep the posts clean and use battery posts with studs, not wing nuts.

Now, since you are talking to me again, and you are not going to be able to talk me out of the fact that I have a whole pile of dead 90 TLDI motors, and broken TLDI parts, tell me what is the difference between a snowmobile that doesn't need any battery to make it run and these various DFI systems that are so fussy.

 

[TOHATSU GURU]

Re: 90 tohatsu TLDI battery requirements

"I'm truly sorry you had a problem(s), but if you want any information about a Tohatsu product you need to ask someone else. Your bowl will forever be dry."


Got a weather question, need medical advice, want to know how to defuse a bomb, curious about the sucide rate of commercial boat operators in Alaska, etc. I'll be happy to discuss it with you. Anything about a Tohatsu....No dice.

 

[lots of boats]

Re: 90 tohatsu TLDI battery requirements

Hi

Like I said before, no worries.

To quote the famous northern explorer, Warburton Pike: The smaller the field of endeavor the more jealously guarded the secrets" unquote

Chevyjet, just curious, do you actually have a Tohatsu TLDI motor, and what is it on?

And I am not clear about the refernce to 2 stoke sled engines, are the DFI systems electonically controlled injectors and why, aside from the weight, don't they need batteries?

Cheers

 

[JB]

Re: 90 tohatsu TLDI battery requirements

Courtesy seems to be at a premium in most of this thread and completely absent from the rest of it.

That is not iboats style, gentlemen. No more.