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Gray 4cyl starting issue

Old Marine Engine » Gray Marine Gas Engines - 4, 6, and 8 cylinder » Gray 4cyl starting issue « Previous Next »

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Joe Knight
Member
Username: busboy

Post Number: 6
Registered: 12-2015
Posted on Monday, June 24, 2019 - 07:08 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I have a 4cyl in my 1954 Lyman
new fuel tank,line,filter,fuel pump,rebuilt carb
will not start without a shot of starting fluid
this is a fairly new,sudden change
was starting with ever even using choke
using choke now makes no difference
also have all new electical componants
thanks in advance
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miro forest
Senior Member
Username: miro

Post Number: 1045
Registered: 11-2001


Posted on Tuesday, June 25, 2019 - 07:34 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

If the choke makes no difference, then it means that somewhere, there is an air leak into the intake manifold. It's probably a gasket issue.
You should also look to make sure the screws holding the top and bottom of the carb body are tight. even if they are a bit lose, you'll have trouble starting. And makes sure there is a gasket there too.

miro
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Ernie
Senior Member
Username: ernie

Post Number: 2529
Registered: 01-2002


Posted on Wednesday, June 26, 2019 - 04:55 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

How does it run once it is started? If it has a good idle I wouldn't start pulling things apart looking for a vacuum leak. Try setting the high speed needle valve a little richer, in fact take it out and look for debris. Be careful of the gas that will come out if you remove it.
Hope this helps
Ernie

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