Looking for a gasket set for my 1988 Mariner/yamaha 25 hp outboard motor. Where do I get a set from?

http://www.marineengine.com/boat-forum/showthread.php?293968-Head-gasket-tight-sequence-and-torque-specs

Douglas, Outboard appears to be 1988, 70 HP. Check the attached links,instruction and guides, Good luck
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Find 1988 Evinrude E70TLCCA 70hp Outboard Motor Parts by Engine Section
Evinrude Johnson outboard parts Drawings How to videos
1988 Evinrude E70TLCCA 70hp Outboard Motor Google Search

50:1
1 liter of oil to 50 liters of petrol
1/2 liter of oil to 25 liters of petrol

renew spark plugs,mix up some fresh fuel,put choke on,throttle set at just above idle,pump up fuel bulb by hand till tight,put outboard in a water drum,try pulling or turning on starter till it fires,then push choke in and restart

Faulty kill switch faulty ign switch,how old is motor,is it electric start,isit ayamaha mariner or mercury mariner,if Yamaha disconnect white wire from cdi

Could be the drive shaft, or maybe your propeller.

http://forums.iboats.com/mercury-mariner-outboards-25/

You have some luck looking around the Mercury section of the boating forums.

http://forums.iboats.com/mercury-mariner-outboards-25/