Removing spark plugs on a 165hp Merc 4-cyl

[gwa584]

Seems silly but for changing plugs on this 4-cyl 165hp Merc engine, do i really have to remove the exhaust riser to get the clearance I need? it's a 5/8" plug and my socket is just the size of the plug so no extras there... I guess I've been lucky with my cars and they've always been decent to access. Any suggestions on a special tool? Even the wobble extension/joint wouldn't fit.

Background:
I have a 1987 Four Winns 170 Candia deck boat with a 165hp Merc inline-4/224cid engine, with a close cooling system and an Alpha One Gen I outdrive. Serial numbers as follows:
- Mercruiser Drive Unit Serial #: 0B701774
- Mercruiser Engine Serial #: B731211

 

[stonyloam]

Re: Removing spark plugs on a 165hp Merc 4-cyl

Seems silly but for changing plugs on this 4-cyl 165hp Merc engine, do i really have to remove the exhaust riser to get the clearance I need?

Nope. What you need for #2, 3 @ 4 is a plug socket with a hex top. Slip the socket on the plug and use an open end or box wrench on the top of the socket (best to do it cold ouch). Be careful you don't drop #4 behind the engine, a pain to get back out LOL:facepalm: