PN 322684, what is the purpose of this?

[johnyrude200]

It is a filler block on early 80’s V4 intake manifolds. Is this simply to keep oil/fuel mix from pooling up behind the leaf valves?

It’s #54 on the diagram in the link below. Pulled apart a V4 for parts and saw these, was wondering what they were for.

http://www.marineengine.com/parts/johnson-evinrude-parts.php?year=1984&hp=90&model=E90TLCRD&manufacturer=Evinrude&section=Intake+Manifold

• This topic was modified 5 years, 3 months ago by johnyrude200.

[garry-in-michigan]

Filling in the block also boosts the crankcase compression a bit to push a little more fuel through the engine to get a little more horse power. . .

• This reply was modified 5 years, 3 months ago by garry-in-michigan.

[kerry]

Ah, yes. The old “stuffing the crankcase” trick.

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