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boscoe99 replied to the thread GPS Speedo.

Depends upon what speed is desired. Speed through the water (think boat and motor performance) or speed between two points in space...

Saturday at 7:37 PM
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boscoe99 replied to the thread Lower unit repair.

A hydrofoil could void a warranty. Most likely related to damaged caused by the foil. Which generally would be the anti-ventilation...

Wednesday at 9:49 AM
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boscoe99 replied to the thread Lower unit repair.

Different perspectives on the world. I worked for one company the majority of my life and then for five plus years following that with...

Tuesday at 2:27 PM
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boscoe99 replied to the thread Lower unit repair.

If part of the anti ventilation plate broke off and a hydrofoil was installed I can see that not being covered by a warranty. If...

Tuesday at 12:05 PM
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boscoe99 replied to the thread Lower unit repair.

Why is that? I used a hydrofoil first on my Mercury 175EFI and then on my Yamaha F200. Worked extremely well. Great bang for the buck. I...

Jun 8, 2026
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boscoe99 replied to the thread 2007 Mercury 115 efi (4-stroke) - not charging the battery.

Interesting to me that Mercury Marine once used a separate electromagnet alternator on some 115 models and now seems to have changed to...

Jun 8, 2026
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boscoe99 replied to the thread 2007 Mercury 115 efi (4-stroke) - not charging the battery.

Given the high costs of labour here in the US, the days of repairing components such as an alternator seem to be long gone. Do marine...

Jun 8, 2026
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boscoe99 replied to the thread 2007 Mercury 115 efi (4-stroke) - not charging the battery.

You test for output directly at the alternator. With the alternator being connected to a known good battery after having confirmed that...

Jun 8, 2026
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boscoe99 replied to the thread 2007 Mercury 115 efi (4-stroke) - not charging the battery.

You seem to be looking for a permanent magnet alternator which is not used on your model. As noted in the post above, a conventional...

Jun 8, 2026
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boscoe99 replied to the thread Dual battery or booster pack?.

Without predicting what the failure mode of a dead battery will be in the future, I cannot hazard a guess as to what the results will...

Jun 7, 2026
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boscoe99 replied to the thread Dual battery or booster pack?.

Two good batteries, yes. If one of the two is defective (not just low on charge) who knows what the outcome may be?

Jun 7, 2026
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boscoe99 replied to the thread 2004 Yamaha 150hp oil sensor light.

If the motor was tilted up when started it is not unreasonable to think the pick up tube will be out of the oil. I am still confused...

Jun 4, 2026
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boscoe99 reacted to 99yam40's post in the thread 2004 Yamaha 150hp oil sensor light with Like.

I wonder if being tilted up allowed the oil pump pick up to suck air. also does anyone know if the oil pressure sensor is a switch or...

Jun 4, 2026
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boscoe99 replied to the thread 2004 Yamaha 150hp oil sensor light.

Now that I think about it the OP probably had low oil pressure given that hte started with the motor tilted up. Running the motor down...

Jun 3, 2026
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boscoe99 replied to the thread 2004 Yamaha 150hp oil sensor light.

No oil level sensor. Only an oil pressure sensor. You made no mention of an alarm sounding or the motor going into RPM reduction mode...

Jun 3, 2026

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