Good Evening, my Name is Joerg and I'm new member here. Upfront many thanks for alle the contributions which I've been able to read prior to membership, this already helped a lot building up knowledge about my motor, hence made some improvements! THANKS!
I run Fletcher GTO with Evinrude 70HP from 1984, bought it in UK a year ago, step by step made improvements in RPM in the meantime. in the beginning, the motor completely bogged and I could not manage to rev beyond 1500 RPM though compression was ok at purchase (+/- 125PSI). I deployed Champions spark plugs, adjusted ignition with Strobolight, cleaned carbs twice including Kit parts, did fuel pump, gaskets, etc. I'm now stuck at 4.800RPM with some limited acceleration. Once I press the starter Solenoid for fuel priming during water operation, it seems to ignite some heavy afterburner and jumps to 5.600RPM immediately. But this is where it should go without pressing any ignition key opening the Solenoid, shouldn't it ? So my guess of course is CARBS. I have to admit that I obviously did not clean all parts of the Carbs since I have left plenty of welch plugs .
CARBS mounted are:
top -> label 394810 70 MX 21 B J (add'l: 328568) / main jet 52D / other jets 43or45 & 68
mid -> label 394811 70 MX 13 B J (add'l: 328568) / main jet 52D / other jets 47or42 & 68
bot -> label 396964 MX 15 C K (add'l 330943) / main jet 57!D / other jet 28 & nil return due to construction
my question now: should I also remove the welch plugs ? which of them ? (Pic1 & Pic2)
summer was way too short (Pic3)
looking forward to get some insights ! handwidth of water ...
.. under your keel
Joerg
I run Fletcher GTO with Evinrude 70HP from 1984, bought it in UK a year ago, step by step made improvements in RPM in the meantime. in the beginning, the motor completely bogged and I could not manage to rev beyond 1500 RPM though compression was ok at purchase (+/- 125PSI). I deployed Champions spark plugs, adjusted ignition with Strobolight, cleaned carbs twice including Kit parts, did fuel pump, gaskets, etc. I'm now stuck at 4.800RPM with some limited acceleration. Once I press the starter Solenoid for fuel priming during water operation, it seems to ignite some heavy afterburner and jumps to 5.600RPM immediately. But this is where it should go without pressing any ignition key opening the Solenoid, shouldn't it ? So my guess of course is CARBS. I have to admit that I obviously did not clean all parts of the Carbs since I have left plenty of welch plugs .
CARBS mounted are:
top -> label 394810 70 MX 21 B J (add'l: 328568) / main jet 52D / other jets 43or45 & 68
mid -> label 394811 70 MX 13 B J (add'l: 328568) / main jet 52D / other jets 47or42 & 68
bot -> label 396964 MX 15 C K (add'l 330943) / main jet 57!D / other jet 28 & nil return due to construction
my question now: should I also remove the welch plugs ? which of them ? (Pic1 & Pic2)
summer was way too short (Pic3)
looking forward to get some insights ! handwidth of water ...
.. under your keel
Joerg
Last edited: