# Mariner Outboard fuel mixture
**URL:** https://boards.straightdope.com/t/mariner-outboard-fuel-mixture/107887
**Category:** Factual Questions
**Created:** [May 8, 2002, 12:24pm UTC](https://boards.straightdope.com/t/mariner-outboard-fuel-mixture/107887 "2002-05-08T12:24:14Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Skaill](https://boards.straightdope.com/u/Skaill)
#### Post date: [May 8, 2002, 12:24pm UTC](https://boards.straightdope.com/t/mariner-outboard-fuel-mixture/107887/1 "2002-05-08T12:24:14Z")
Does anyone know the correct fuel to 2 stroke oil ratio for a mariner 2HP outboard motor (it’s probably 10 years old) ? 100/1 50/1 25/1 or what ?
Have searched and searched without success, even the mariner site doesnt give this info surprisingly, and the closest I can get is plenty of sites selling the owners manual.
---
### Author:  [@Billdo](https://boards.straightdope.com/u/Billdo)
#### Post date: [May 8, 2002, 1:31pm UTC](https://boards.straightdope.com/t/mariner-outboard-fuel-mixture/107887/2 "2002-05-08T13:31:07Z")
I checked with my dad, who has an '83 Mariner. The manual says to use a 50-1 mixture.
The engines this would apply to are branded Mariner, but were actually built by Yamaha. I think that Mariner 2-horses stayed the same through the early '90s at least, but I’m not sure.
You may want to check the web for the stats for a Yamaha motor of the same era.
Good luck.
---
### Author:  [@sailor](https://boards.straightdope.com/u/sailor)
#### Post date: [May 8, 2002, 3:46pm UTC](https://boards.straightdope.com/t/mariner-outboard-fuel-mixture/107887/3 "2002-05-08T15:46:07Z")
I do not think the ratio is very critical and you are probably safe using 2%. I think only very old types of two stroke motors required higher than that. I was once using 5% by mistake and managed to goo up the muffler to the point where it had to be replaced but I do not think you can damage the engine by using too much.