JayEll87
Cadet
- Joined
- May 16, 2018
- Messages
- 24
Greetings from Northern Europe! New guy calling. I’m facing some strange issues with my 23ft Wellcraft with 5.7 Merc Vortec (-00) which I resently bought. I’ve made some basic maintenance to it but the 2bbl mercarb is making me insane..
Originally boat ran quite well despite slight hesitation in smaller revs, on plane she went well. I tried to fix the hesitation and readjusted the float level to specs specified, 9mm(11/32) and drop of 24mm(15/16.) After this engine worked fine on idle but that’s it, hardly 1600rpm and horrible rumble and backfire was created. There was also quite heavy smell of petrol and some fuel was also sprayed from open hull through exhaust. So to my mind it seems that she’s running very rich. She worked much better with original float setting which was somewhat level with the body of the carb, maybe something 13-14mm...She also starts without chokeplate(constantly open) and without pumping gas level prior starting on somewhat cold weather so on that respect mix is also rich..
So, what would be the explanation for this? Timing is checked, plugs and wires are new, fuel filters are new, fuel pressure is 5psi, fuel is changed... so these should all be good.
Appreciate for any help.
Originally boat ran quite well despite slight hesitation in smaller revs, on plane she went well. I tried to fix the hesitation and readjusted the float level to specs specified, 9mm(11/32) and drop of 24mm(15/16.) After this engine worked fine on idle but that’s it, hardly 1600rpm and horrible rumble and backfire was created. There was also quite heavy smell of petrol and some fuel was also sprayed from open hull through exhaust. So to my mind it seems that she’s running very rich. She worked much better with original float setting which was somewhat level with the body of the carb, maybe something 13-14mm...She also starts without chokeplate(constantly open) and without pumping gas level prior starting on somewhat cold weather so on that respect mix is also rich..
So, what would be the explanation for this? Timing is checked, plugs and wires are new, fuel filters are new, fuel pressure is 5psi, fuel is changed... so these should all be good.
Appreciate for any help.