Correct fuel line dia for a yam 90hp

[Gramas80]

Am I right in thinking that 3/8 fuel line best to use for a 1990 yam 90 autolube 688 model? Search net for info but can't see anything

[boscoe99]

More than likely it is 6mm. Close to 5/16ths of an inch. If we are talking about the hoses on the motor itself.

If you are talking about the supply hose to the motor then it is probably 8mm or close to 3/8ths of an inch.

[Gramas80]

Thanks boscoe, 3/8" it is , finally got the engine tacho wired and running perfectly too , again big thanks