Search found 5 matches

by supagruv
Wed Jan 06, 2021 2:40 pm
Forum: REPAIRS and MODIFICATIONS
Topic: 2005 Mercury 60 EFI lugging
Replies: 15
Views: 6757

Re: 2005 Mercury 60 EFI lugging

Good News!!! I installed the set of new coils and immediately the motor ran smoother on the muffs (less vibrations) and when idling into higher rpms it was significantly quieter. We took the boat out in the bay and it now runs GREAT! WOT to nearly 6k rpms! What a relief... I was beginning to think t...
by supagruv
Mon Jan 04, 2021 3:29 pm
Forum: REPAIRS and MODIFICATIONS
Topic: 2005 Mercury 60 EFI lugging
Replies: 15
Views: 6757

Re: 2005 Mercury 60 EFI lugging

I really appreciate everyone's feedback and all the sharing of knowledge going on. I feel wiser with every step and with any luck am closer to a solution. I replaced the NGK plugs with the OEM Champion ones and gapped them to be 1-mm as per the manual. I installed a new fuel filter on the starboard ...
by supagruv
Fri Jan 01, 2021 6:00 pm
Forum: REPAIRS and MODIFICATIONS
Topic: 2005 Mercury 60 EFI lugging
Replies: 15
Views: 6757

Re: 2005 Mercury 60 EFI lugging

The original spark plugs were OEM Champion RA8HC with a 1.00 mm gap, and they were worn looking and rusty at the bases. I could not get the Champion plugs, and I put in NGK DCPR7E. I just checked the gap and it's only 0.80 mm on the NGK plugs. Would [a change in spark plug gap to 0.80 mm from 1.00 m...
by supagruv
Fri Jan 01, 2021 4:42 pm
Forum: REPAIRS and MODIFICATIONS
Topic: 2005 Mercury 60 EFI lugging
Replies: 15
Views: 6757

Re: 2005 Mercury 60 EFI lugging

I highly appreciate all your posts. To have experts chime is good. I removed the injectors the other day and inspected and cleaned them. They did have a lot of black junk around the rim of the nozzles which didn't look good. I've ordered a set of new injectors and they should get here in a week or t...
by supagruv
Wed Dec 30, 2020 8:39 pm
Forum: REPAIRS and MODIFICATIONS
Topic: 2005 Mercury 60 EFI lugging
Replies: 15
Views: 6757

2005 Mercury 60 EFI lugging

I got a used 2005 Mercury 60-HP EFI FOURSTROKE BIGFOOT SN 1B004844. Overall the engine is in excellent condition. The engine seemed to run fine when we ran it on muffs. When in the water and with load, the Mercury 60-HP FOURSTROKE EFI BOGFOOT is missing and lugging. The engine cannot accelerated pas...