What size core plug

[Meggie moggy]

Heeeeeeelp Meggie has kindly decided to let go on the core plug above the dip stick and I am struggling to get the correct as ESM could not confirm if their standard plugs would fit due to her engine being a 1275 Marina unit.
Does anyone know if the standard plugs are suitable and if not a point in the correct would really be appreciated

[les]

I bought some for a classic mini block 18 months ago and fitted them to a 1275 Marina unit. The item number is 271704826349. Including p&p it came to £6.40. I probably bought these from eBay. No phone number but an email. ——-enquiries@woodandpickett.com

[philthehill]

The core plugs fitted to the Marina 1275cc are different to the Minor and the Minor core plug will not fit.
The Marina core plug is pan shaped and not convex as are the Minor core plugs.
These are the correct core plugs for the 1275cc Marina block: -
https://www.ebay.co.uk/itm/271704826349 ... BMitDhx_Jg
There is no backstop to the core plug hole, so care has to be taken to ensure that the core plug is not knocked so far into the block that it falls into water jacket. Once in there you will find it impossible to get the core plug out.
If you have one core plug rusted away the others cannot be far behind. There are two core plugs in the rear of the engine block which requires the engine to be removed and the rear engine plate removed for access.

[Meggie moggy]

Hi Lea and Phil
Thank you for the replies and help I have ordered a set and hopefully will replace the 3 on the side of the block as for the back 2 I am crossing my fingers and toes untill the day comes when I have to pull the engine ( not easy on a friend's unmade sloping drive but interesting) will let you know how the replacements go. Just as thought would now be a good time to flush the block with citric acid?
Steve

[philthehill]

Personally, I would not flush the block with citric acid at this time.
The citric acid may eat away at those two rear core plugs and cause them to fail and leak.
Flush with citric acid just before you intend to re-build the engine.

[Meggie moggy]

Cheers phil point taken