Gallery: Feeding Your Yamaha SVHO Fresh Outside Air For Pennies

[Rustymuscle]

Have you ever wondered how you can improve how your SVHO-powered Yamaha performs for nearly free? Internal combustion engines thrive on cool, dense air to give them the densest “intake charge” possible – meaning a stable, efficient explosion. Ingesting hot air delivers less horsepower, inconsistent fuel combustion and early detonation. So helping feed your SVHO the most cool, dense air seems like a no-brainer, right?

Read the whole story at The Watercraft Journal HERE:

[K447]

… trimming these air inlet tubes and redirecting them towards the air intake … the flow of … outside air … towards your engine instead of … the entire engine compartment.

It’s a small step that likely won’t deliver in any measurable top end speed gains but will – over time – result in better engine efficiency and longevity.

I shall submit that redirecting the air inlet tubes would not extend engine longevity. Nor engine efficiency, whatever is meant by that.

Immeasurable top speed gains - hopefully there is some other reason for doing this modification.

What the article does not mention is why those tubes are there at all, from the factory. And why the open ends of the tubes are factory located very low in the hull.

Those ventilation tubes are not

… just trying to cool the entire engine compartment …