i recently purchased a 2002 ranger 522 powered by 250 pro xb. the previous owner used 87 octane fuel and left a full tank of fuel. should i or can i add an octane booster to the fuel to compensate for the differance and if so how much do i add?
i recently purchased a 2002 ranger 522 powered by 250 pro xb. the previous owner used 87 octane fuel and left a full tank of fuel. should i or can i add an octane booster to the fuel to compensate for the differance and if so how much do i add?
Dallas ColeRANGER 522 DVX / Mercury 250XB
if ti was me i would drain it and start fresh
Dan
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dan896 »</TD></TR><TR><TD CLASS="quote">if ti was me i would drain it and start fresh
Dan</TD></TR></TABLE>
+1
It could (potentially) save your engine.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
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not a pro or a tech---
having a 250 XB that has run significant amount of 87 oct I would do the suggestion about drainning, refill with 93 and appropriate kwick klean and baby he heck out of it till i could get someone like Don or at least a good Merc guy to DeCarb and check out the engine from top to bottom. have always been told nothing less than 93 for it to live a long live. that has always made me nervous when fishing areas that had minimal 93 pumps.
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