if you go to Lowes/Walmart or somewhere that sells:
Mean Green
https://www.walmart.com/ip/Mean-Gree...fl-oz/19853412
spray it on and hit it with a strong hose spray virtually no scrubbing
here is a link to their website:
http://www.meangreendegreaser.com/
I sprayed it on jetski engine (had a crack in oil fill tank and engine got messy) let sit washed it off and just hit it one more time and washed off for good measure - DID NOT have to use the one with Bleach, and yes did it away from the lake but the one I used:
Mean Green Super Strength does not contain any acid, bleach, or ammonia, and are made with biodegradable cleaning agents. All Mean Green bottles are recyclable. (from their FAQs page)