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Re: [Healeys] Grose-Jets

To: Bob Spidell <bspidell@comcast.net>
Subject: Re: [Healeys] Grose-Jets
From: Alan Seigrist via Healeys <healeys@autox.team.net>
Date: Fri, 8 Oct 2021 08:15:22 +0800
Cc: healeys@autox.team.net
Delivered-to: mharc@autox.team.net
Delivered-to: healeys@autox.team.net
References: <617A842F-D6A2-4B1C-AE09-540308B4C17C@me.com> <bsvslg5u7e29m2e1oe52obsfatdphcu3co@4ax.com> <e81b6e6e-27b0-f279-cb78-7c1467abe74f@comcast.net>
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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=E2=80=99t 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=E2=80=99t work because something is jammed in the balls.  Grose jets =
can also
fail closed if the little ball gets stuck.  I=E2=80=99ve had both modes of =
failure
with them.

In my use experience I haven=E2=80=99t 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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<div dir=3D"auto">After all of us discussing Grose Jets for years, I think =
it really boils down to the modes of failure for both:</div><div dir=3D"aut=
o"><br></div><div dir=3D"auto">1) Traditional jets typically only have one =
mode of failure - they kink in place and freeze open, and fuel flows out th=
e overflow pipes.=C2=A0 This only happens on startup and if you are paying =
attention you can stop it with a tap of the mallot.=C2=A0 This failure does=
n=E2=80=99t happen very often but fuel can be wasted.=C2=A0 The failure is =
minimized with proper adjustment.=C2=A0 Traditional jets handle crud in the=
 fuel generally quite well.</div><div dir=3D"auto"><br></div><div dir=3D"au=
to">2) Grose Jets can fail both closed and open.=C2=A0 They are VERY sensit=
ive to crud in the fuel and if they fail open, sometimes tapping with a mal=
lot doesn=E2=80=99t work because something is jammed in the balls.=C2=A0 Gr=
ose jets can also fail closed if the little ball gets stuck.=C2=A0 I=E2=80=
=99ve had both modes of failure with them.</div><div dir=3D"auto"><br></div=
><div dir=3D"auto">In my use experience I haven=E2=80=99t seen much differe=
nce 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 sprin=
g loaded peg and rubber tip.</div><div dir=3D"auto"><br></div><div dir=3D"a=
uto">Best,</div><div dir=3D"auto"><br></div><div dir=3D"auto">Alan</div><di=
v><div class=3D"gmail_quote"><blockquote class=3D"gmail_quote" style=3D"mar=
gin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex" dir=3D"auto">
<br>
</blockquote></div></div>

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