Probably why it’s harder to find…
Your model number is 7006201GB which again is hard to locate anything against it online.
That mentioned, I’m able to find a model number that is right next to it / yours in which will offer a parts catalog that should work for your model number too.
The other...
15 M (S = Short Shaft)
S/N range 684-062459 - 684-074082 =
1988
Model number 7015201NU ( MH)
https://www.marineengine.com/parts/mariner-outboard-parts/15c
Merc service manual part number 90-14679 / 386 8B covers (677)/W8 (677)/Marathon 8 (677) 9.9C (682)/15C (684) (I)...
Engine serial number is?
Possibly there’s an issue within the fuel pump cooling side of the system… Water blockage in-turn getting the fuel hot.
Without your engine serial number, here’s an example to start to compare notes, etc..
https://www.mercruiserparts.com/bam/subassembly/32557/11848/80
Your engine serial number shows it to be a 1985... Model number 7040525.
https://www.marineengine.com/parts/mariner-outboard-parts/40c-twin-carb/6e9400231-thru-6e9423162---el
With this situation about the best you can do is click on the report button under your post on the lower left side and leave a message so they can edit the post in question when the Administrator "checks in" most likely Monday or Tuesday would be a guesstimate for this site.
0A153049 comes up as an 1985 35_HP [ELPT] Model number 1035625.
Parts Group:35 HP Options: Electric start, long shaft (20”/508mm) driveshaft housing. Remote control steering. Power trim standard. Model style, ELPT.
https://www.marineengine.com/parts/mercury_marine_parts/sn/A153049
Service...
Look up Mercruiser Mercury Commander 3000 Classic Remote Control Neutral Throttle Button part number 822212T.
https://www.marineengine.com/newparts/part_search.php?part_num=822212T...
Your serial number 00138041 has the Model number as 7005205
1985, Parts Group :5 H.P. Options: Manual start, short shaft (15”/381mm) driveshaft housing. Tiller handle steering, Model style: M.
https://www.crowleymarine.com/mariner/oem-parts/outboard/1985/-7005205?q=7005205
Possibly a bad O-ring item number 22 or damage in the area of (to) the fuel pump, https://www.marineengine.com/parts/mercury-outboard-parts/20-carb2cyl4stroke/0r235168-up/intake-manifold-and-fuel-pump
"Note" 'The following linked service manual is not for your engine size/model, just using it...
What year?
It’s the same part number for both sides.
99746A17 Exhaust Manifold - Port or Starboard - For Use on Port or Starboard Side Of V-6 (220 and 262 CID) MerCruiser Stern Drive and Inboard Engines...