[Healeys] Grose-Jets

Alan Seigrist healey.nut at gmail.com
Thu Oct 7 18:17:21 MDT 2021

one final point - if you have a partially flooded float, Grose Jets work
better, but I use nitrile floats now so it doesn’t really matter now.

On Fri, 8 Oct 2021 at 8:15 AM, Alan Seigrist <healey.nut at gmail.com> wrote:

> After all of us discussing Grose Jets for years, I think it really boils
> down to the modes of failure for both:
> 1) Traditional jets typically only have one mode of failure - they kink in
> place and freeze open, and fuel flows out the overflow pipes.  This only
> happens on startup and if you are paying attention you can stop it with a
> tap of the mallot.  This failure doesn’t happen very often but fuel can be
> wasted.  The failure is minimized with proper adjustment.  Traditional jets
> handle crud in the fuel generally quite well.
> 2) Grose Jets can fail both closed and open.  They are VERY sensitive to
> crud in the fuel and if they fail open, sometimes tapping with a mallot
> doesn’t work because something is jammed in the balls.  Grose jets can also
> fail closed if the little ball gets stuck.  I’ve had both modes of failure
> with them.
> In my use experience I haven’t seen much difference between the two, and
> having had Grose Jets shut off my fuel in the past I tend to favor the
> traditional style, esp when they have the little spring loaded peg and
> rubber tip.
> Best,
> Alan
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