1956 30hp big twin

[pc40chas]

i know this is a repeat question for most but is 50:1 too lean. i run 50:1 on my 1954 7.5 rude dude and it runs great. what about the 30hp?

 

[tashasdaddy]

Re: 1956 30hp big twin

both should be atleast 24:1.

 

[wbeaton]

Re: 1956 30hp big twin

Both should be 24:1. Especially the 7.5 hp. Some will say the 7.5 hp should be run at 16:1.

 

[pc40chas]

Re: 1956 30hp big twin

so u think i should richen it up? i dont want to ruin them and what do u recommend for oil type? thanks

 

[wbeaton]

Re: 1956 30hp big twin

TC-W3 outboard oil mixed with 87 octane gas. I prefer synthetic oil as it smokes much less and is more environmentally friendly.

 

[Chinewalker]

Re: 1956 30hp big twin

Absolutely richen them up!! The 7.5 especially, as it is babbit bearings throughout and needs the extra oil both as a lubricant and as a cushioning & sealing agent. 24:1 using TCW3 rated oil & 87 or 89 octane gas in both...
- Scott