I agree on the Clear fuel line as you can see in attached pic also I see your location as New Zeland so I dont know if the have ULSD there but if they do you need to start running 2Stroke motor oil with your fuel a 1/2 to 1 ounce per gallon of fuel a ULSD is way to dry for our IPs this will ad to the longevity of them

 

0r u could run straight wmo like me

 

Unsure on the comparison between our fuels, but I think that we have a fairly low sulpher content. We sometimes run 2 stroke mix, just to give that extra help to the IP.

Is that clear line on the return on the IP?

 

Yes the clear line goes on the IP return.