simon3000
New Member
I am trying to find out what 2 stroke mix to use for jhonson seahorse 6hp model 6BAL77M
Jhonson seahorse
- Thread starter simon3000
- Start date
nordic_ranger
Well-Known Member
Hi Simon and welcome to the forum. Your engine uses a 100 to 1 mix but sometimes it is better to use slightly more oil say 75 to 1. This site might help you, it will allow you to find out the age of your engine and if it is an older engine it may require 50 to 1.
VicS
Well-Known Member
G
Guest
Guest
Mine runs on 50-1 ... when I can be bothered to lift the darn thing !!
Lakesailor
Well-Known Member
Apparently in the early '80 they started recommending 100:1 but quickly reverted to 50:1. So stick with that.
VicS
Well-Known Member
[ QUOTE ]
early '80 they started recommending 100:1
[/ QUOTE ] Mid '80 I think as my 1984 6hp Evinrude uses 50:1 and I believe the temporary change to 100:1 was in 1985. I would stick to 50:1 even for those though especially if the motor was to be used at high revs.
early '80 they started recommending 100:1
[/ QUOTE ] Mid '80 I think as my 1984 6hp Evinrude uses 50:1 and I believe the temporary change to 100:1 was in 1985. I would stick to 50:1 even for those though especially if the motor was to be used at high revs.
gary_yank
Member
I Have an Evinrude that is the same model, decals and paint differ, and the same year-the book directs the use of 50:1. As fuel octane rating today is lower than the year of manufacture I went with hotter spark plugs and if the carb is clean you will have few problems with that side.
If it has not been run lately you may want to run it in a barrel of water to insure there are no problems.
If it has not been run lately you may want to run it in a barrel of water to insure there are no problems.
VicS
Well-Known Member
[ QUOTE ]
As fuel octane rating today is lower than the year of manufacture I went with hotter spark plugs
[/ QUOTE ] That is advice I have not come across before. However my operators manual specifies a minimum "Research Octane Number" (RON) of 69. Currently the "lowest" grade of petrol available from UK garage forecourts is ordinary "Premium" unleaded which has a RON of 95
As fuel octane rating today is lower than the year of manufacture I went with hotter spark plugs
[/ QUOTE ] That is advice I have not come across before. However my operators manual specifies a minimum "Research Octane Number" (RON) of 69. Currently the "lowest" grade of petrol available from UK garage forecourts is ordinary "Premium" unleaded which has a RON of 95
G
Guest
Guest
RON ....
Generally available lowest Octane ( named by its MON in this case ) is Russian 76 .... about 82 RON ... - that is in North Europe. It is not available to forecourts except in FSU countries ...... Most actually goes for bulk blending - which ends up via various Petrol Stations in UK and EU etc. (The US takes large quantities of blend also regardless of the "official statements" ......)
So I wouldn't worry too much about Octane ratings .... with the boosters and C5 / C9 etc. that's put into modern stuff - it'll run !!
Generally available lowest Octane ( named by its MON in this case ) is Russian 76 .... about 82 RON ... - that is in North Europe. It is not available to forecourts except in FSU countries ...... Most actually goes for bulk blending - which ends up via various Petrol Stations in UK and EU etc. (The US takes large quantities of blend also regardless of the "official statements" ......)
So I wouldn't worry too much about Octane ratings .... with the boosters and C5 / C9 etc. that's put into modern stuff - it'll run !!