Brass screw on carb
- Thread starter Jobs a good un
- Start date
Boathook
Well-known member
The screw to adjust in normally like a pan head with a spring to keep it in tension. The screw you have pictured normally holds a jet.
Engine details will help others to comment.
Engine details will help others to comment.
VicS
Well-known member
Need to know make , model (HP) and year to be sure but I think that screw is the slow speed jet
Idle speed and slow speed mixture adjustment where shown. Access to the mixture adjustment is probably plugged to prevent tampering
Jobs a good un
Member
VicS
Well-known member
What I guessed. Therefore parts as I suggested
Screwdriver slot already looks a bit damaged. Grind a screw driver blade to fit the slot. Nice and square , No rounded edges.
Could try a little heat> aluminium does expand a little more than brass > and a good release oil ( eg Plus Gas.
The jet needs to be screwed back in.
Remove the plug to access the adjusting screw and turn out a little at a time ( note the amount )
QBhoy
Well-known member
Can I suggest that the issue may just be the very common one that these particular engines suffer from ? That being that it’s taking oil into the carb. Can happen with too much oil but more commonly after sitting on its side during storage or transport. Even if it’s been on the correct side. Total pain and requires a carb clean each time after
VicS
Well-known member
That may explain the smoke but the fact remains that the idle jet has been partly unscrewed and cannot now be screwed back in
QBhoy
Well-known member
I’d be almost sure that if he takes the carb off, looks in at the seating position near the throttle barrel (to understand what it’s doing)…and uses the right size screwdriver…all will be well. Likely it’s hard seated I’d suspect. Shouldn’t be all the way in anyway…as you’ll know
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