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Mechmagcn replied to the thread Tohatsu electrical problem.

Well, I checked the engine grounds and found no problem, guess I'll just put a battery disconnect on it for now.

Apr 15, 2025
Mechmagcn posted the thread Tohatsu electrical problem in Honda & Tohatsu/Nissan Outboards.

Hi all! I have a 2019 MFS40 that recently is giving me trouble. It has always performed flawlessly until yesterday. I noticed upon...

Apr 7, 2025
Mechmagcn replied to the thread '19 115 Merc water in fuel.

This is a CT, no spin on, only a small inline.

Feb 14, 2025
Mechmagcn reacted to Chris1956's post in the thread '19 115 Merc water in fuel with Like.

Merc Optimax's had a spin on fuel filter on the port side. It had a water sensor.

Feb 14, 2025
Mechmagcn replied to the thread '19 115 Merc water in fuel.

I think I found it, a quick Google search shows it's probably a loose wire that's gotten wet or shorted. There's no water separator for...

Feb 14, 2025
Mechmagcn posted the thread '19 115 Merc water in fuel in Mercury & Mariner Outboards.

Hi all! I work for a small state park. We're trying to upgrade our older pontoon boat and have acquired a 2019 Aloha barge with a 115...

Feb 14, 2025
Mechmagcn replied to the thread MFS25 fuel in oil.

Ok, changed out the low pressure fuel pump two weeks ago and so far, so good. I changed the oil again when I put the new one on and have...

Feb 13, 2025
Mechmagcn replied to the thread MFS25 fuel in oil.

Talked to my local dealer and he thinks it's the low pressure fuel pump too. I'll pick it up in the morning. Thanks all for the responses.

Jan 27, 2025
Mechmagcn reacted to matt167's post in the thread MFS25 fuel in oil with Like.

If that is HPDI then it could be a mechanical high pressure fuel pump. Those can dump gas in the oil

Jan 27, 2025
Mechmagcn replied to the thread MFS25 fuel in oil.

That's what I'm thinking, don't think there's anything else that'll put that much gas in the oil, but then again, I'm not sure how long...

Jan 27, 2025
Mechmagcn reacted to pvanv's post in the thread MFS25 fuel in oil with Like.

Check the low pressure gas pump. A blown diaphragm will do that.

Jan 27, 2025
Mechmagcn replied to the thread MFS25 fuel in oil.

I am a mechanic, just not familiar with outboards.

Jan 27, 2025
Mechmagcn posted the thread MFS25 fuel in oil in Honda & Tohatsu/Nissan Outboards.

Hi all. It's been awhile since I've been here, these Tohatsu motors are mostly trouble free. With that said, I noticed my 2020 MFS25...

Jan 27, 2025

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