TeenGee
Jet Boat Junkie
- Messages
- 302
- Reaction score
- 292
- Points
- 137
- Location
- Banana River Florida Space Coast
- Boat Make
- Yamaha
- Year
- 2024
- Boat Model
- FSH Sport
- Boat Length
- 25
I hope one of you has already done the experimenting with spark plug gap and found the optimum gap.
I just got my 210FSH back from the dealer servicing. Among other things, they changed the spark plugs. The port engine ran up to 7,200 rpm like before the servicing. The starboard engine maxed out at 7,000 rpm. I inspected the plugs and all but 1 were gapped to 0.028". Number 2 plug on the starboard engine was 0.030". I set it to 0.028".
The range in the manual is 0.028" - 0.031".
The service manual says the max rpm is 8,000.
I have read that high output engines run better with smaller spark plug gaps. I at about 115 hp from 1,050cc would consider the TR-1 as a high output engine. I'm wondering if a gap less than 0.028" would get more rpm from my engines.
Have any of you tweaked the spark plug gaps and gotten some more rpm from their engines?
I just got my 210FSH back from the dealer servicing. Among other things, they changed the spark plugs. The port engine ran up to 7,200 rpm like before the servicing. The starboard engine maxed out at 7,000 rpm. I inspected the plugs and all but 1 were gapped to 0.028". Number 2 plug on the starboard engine was 0.030". I set it to 0.028".
The range in the manual is 0.028" - 0.031".
The service manual says the max rpm is 8,000.
I have read that high output engines run better with smaller spark plug gaps. I at about 115 hp from 1,050cc would consider the TR-1 as a high output engine. I'm wondering if a gap less than 0.028" would get more rpm from my engines.
Have any of you tweaked the spark plug gaps and gotten some more rpm from their engines?