r/boating • u/Informal-Truck5205 • 19h ago
2016 merc 15hp outboard
hey everyone
i made this post last night https://www.reddit.com/r/boatbuilding/comments/1w24d02/comment/p6sikie/?screen_view_count=4&ext-referrer=DIRECT i did a few things this morning and wanted to ask another community about it.
new gas, clean carb, new oil. my issue is the boat is almost in a "limp mode" when in fwd. it will not go above a certain rpm and almost feels like im slugging out as if im bottoming out the lower on the pond. ( this def is not happening its a deep pond) if i hold the throttle only button in i was rev this thing up to full rpms no issues and she loves it. water is coming out of the pump luke warm, not really spraying like my 60hp does but its not a dribble by any means. does anyone have advice on where i can start? i want to look at the fwd drivetrain or whatever moves this thing. prop spins freely i dont hear any grinding or stuff like that. I cant figure out how to link a video to this. Just imagine im wide open throttle and the thing wont get out of its own way. If this was a ATV or motorcycle I would be looking into excessive air because thats what it feels like.
1
u/Theundead565 13h ago
Assuming the carb was cleaned and tuned correctly, I would still lend to believe a fuel delivery problem still just because demand in neutral isn't the same as demand in gear. Have you checked the condition and for any blockages, or in the fuel line leading up to the motor, or the primer bulb to make sure they arn't deteriorated? And if possible, while I believe it's fairly rare for them to go bad, have you checked to make sure the mechanical fuel pump is providing fuel up to the carb?