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View Full Version : WHAT GAS TO USE IN MY MERC 2 STROKE 6 ??

wickedrister
10-04-2003, 08:22 PM
http://www.checkmate-boats.com/infopop/emoticons/icon_confused.gifDO I NEED TO RUN HIGH TEST GAS OR IS REGULAR OK.HOW DO YOU FEEL ABOUT RUNNING SEA-FOAM IN THE GAS TANK? DO I NEED TO USE IT WITH EVERY FILL UP? THANK YOU!
wickedrister
10-04-2003, 08:22 PM
http://www.checkmate-boats.com/infopop/emoticons/icon_confused.gifDO I NEED TO RUN HIGH TEST GAS OR IS REGULAR OK.HOW DO YOU FEEL ABOUT RUNNING SEA-FOAM IN THE GAS TANK? DO I NEED TO USE IT WITH EVERY FILL UP? THANK YOU!
ncst8er
10-04-2003, 08:53 PM
If your compression is stock (approx. 125 psi); regular might be OK, but I'd rather see mid-grade (it's not worth the risk to me). If the compression has been raised (up to 140-145 psi), then high test is needed. Above 145 psi, high octane racing fuel is needed.
175checkmate
10-04-2003, 09:24 PM
The tower for power had good compression. I wold run hi-test. Spark knock is hard to hear in a 2 stroke. Better to be safe.

http://www.checkmate-boats.com/images/avatars/GusAvatar2.jpg


1975 Checkmate Tri-mate 2, 2.4 200+ / Sky jacker 6" plate / 25p Laser 2 prop
ncst8er
10-04-2003, 11:27 PM
Oops, sorry I didn't look at the avatar photo closely to see it was the straight 6 instead of a vee. In that case, I'd agree with 175Checkmate, stick with high test.
wickedrister
10-05-2003, 02:54 AM
http://www.checkmate-boats.com/6/ws/,s,8626072361/Graemlins/thumb.gifTHANKS FOR THE HELP I NEED ALL THE HELP I CAN GET.LOOK OUT! http://www.checkmate-boats.com/6/ws/,s,8626072361/Graemlins/Eyecrazy.gifANOTHER FIRST TIME BOAT OWNER WITH A 1000 QUESTIONS.I AM GETTING THE BOAT CHECKED OUT AND RUNNING GOOD BEFORE I PACK IT UP FOR THE WINTER. (THANK YOU)
JW
10-05-2003, 09:43 AM
ALSO....Sea Foam is OK, just don't over do it. I started using it after having it recommended to me by a mechanic. Your motor was made for 87 octane, but you can never hurt it by running 90+ octane in it to be safe. AND DON'T USE gas with alcohol in it! Buy gas from a big name station that is busy. That way you have a better chance of getting gas that is fresh and actually the octane that's posted on the pump.....

Checkmates owned: 1995 Pulsare 2100BR/1995 Mercury Promax 225 2.5 EFI. 1995 Persuader 183/4.3 LX V6. 1992 Pulse 171/1992 Mercury XR6 150 hp 2.5 liter.