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Yamaha 70hp 2 stroke hours?
mrengles	#1  Posted on 02/12/09 - 7:52 AM
Member Posts: 19 Comments: 0 Joined: 02/09/09	Gentlemen, I've been looking whaler with a 2003 yamaha 70hp 2 stroke with 140 hrs on the motor. I have been wondering what type of hours can I expect from this motor if properly maintained? Is 140 hrs on a 2003 motor allot? And what should I look for before I go buy it? Your thoughts and or experience would be greatly appreciated. Thanks, Mrengles 2005 Montauk 170 - 90 HP Mercury Saltwater Series
jquigley	#2  Posted on 02/12/09 - 8:14 AM
Member Posts: 269 Comments: 1 Joined: 07/17/07	Doesn't seem like a lot to me. Outboards, if properly maintained can last a long time. I think the most important thing to find out is the maintenance history of those first 140 hours. The magic number I go by is 1000 hrs. 1000 hours typically is an old tired motor, but that is certainly not the death of an outboard. Some people have 140 hours on their motor in one season or less. Have a trusted mechanic go over it, to check compression, gaskets, etc. unless you are confident enough to do it yourself. That usually can give some insight into the previous maintenace history if records are unavailable. I think there is an article or previous thread out there about testing outboards. I know iboats.com has a forum dedicated specifically to Yamaha outboards. http://forums.iboats.com/forumdisplay...y.php?f=26 Maybe check in there and see what they say. The following is from discoverboating.com http://www.discoverboating.ca/owning/...board.aspx After Every Trip -After every outing, flush out the engine. This doesn't just apply to salt water adventures, but to fresh water outings as well. -Buy a set of "rabbit ears": two flexible rubber seals connected with a metal clamp. Slip the apparatus onto the lower unit where the water is picked up and attach a garden hose. -Start up the engine and let the water pump do the rest. (Practice safe boating and remember to stay clear of the prop and make sure no one tries to shift the motor into gear.) -While you're flushing the motor, check the water pump to make sure it has good water flow. -Carefully put your finger through the stream of water. It may be warm, but it shouldn't be hot. If the output is not strong, you may have some debris stuck in the outflow tube. Immediately shut down the engine to prevent overheating and damage. -Insert a small piece of wire into the flow tube and work it back and forth. Start the engine again and check the output. If that doesn't solve the problem, you may need a new water pump. -After flushing the engine, disconnect the fuel line and allow the engine to burn all the fuel in the carburetor. -Once you've finished the flushing and run the engine out of fuel, be sure to turn off the key and, if you have a battery switch, turn it off. -Take the engine cowling off and check for fuel or water leaks. If you find leaks, consult your safe boating mechanic. -Wipe everything down and spray with an anti-corrosive like WD 40 or Quick-lube. Be sure to lubricate all the moving parts such as the shift and throttle cables, carburetor valves, etc. -Replace the cowling and wipe it down. Keep a canvas or plastic cover on the engine between trips. -Always use fresh fuel. At the end of the season, boat motor maintenance should include draining your tanks and taking the fuel to the proper recycling authority. Regular Maintenance -Periodically check the fuel line for cracks and worn spots. -Make sure the fuel primer bulb is not cracked and is pliable. -Make sure the fuel-line fittings seat properly and don't leak. -Check the clamps on the fuel line for rust or corrosion. -Check the fuel tanks for damage and corrosion. -Check the tank vent to make sure it aspirates properly. -Check regularly for water in the fuel. -John Edited by jquigley on 02/12/09 - 8:27 AM
TexasOutrage	#3  Posted on 02/12/09 - 8:32 AM
Member Personal Page Posts: 246 Comments: 1 Joined: 02/16/08	I'll second John's post. 140 hrs is considered low hours. My only concern with used motors lately would be hurricane damage/submersion. Have a mechanic check it out. What type whaler is it on?
Phil T	#4  Posted on 02/12/09 - 8:40 AM
Administrator Personal Page Personal Album Project Albums Posts: 7043 Comments: 6 Joined: 03/26/05	I have 170 hrs in 3 seasons on my 2003 Yamaha F115. That is not much use. I have read the average season for boaters is 50 hours in the Northeast. Seeing you are in Florida, I would say that is REALLY low. As far as longevity, 1000, 2000 hours is not unheard of. I have read also that an engine that is used lasts longer than one that is lightly used. That engine model is very reliable and a solid design. 1992 Outrage 17 I 2019 E-TEC 90, Viper 17 2+ 2018 Load Rite Elite 18280096VT
Guts	#5  Posted on 02/12/09 - 9:42 AM
Member Personal Page Posts: 612 Comments: 8 Joined: 11/21/08	There is no average, but I think ( don't beat me up on this one) 100 hrs per year would be average. That's based on my own experience. It like others said where the boat is located. fixed spelling! sorry must have been on my first cup of coffee Edited by Guts on 02/14/09 - 10:15 AM
themclos	#6  Posted on 02/13/09 - 10:39 AM
Member Personal Page Project Albums Posts: 81 Comments: 3 Joined: 12/11/05	I would not consider that to be alot of hours. That is a great motor. They just run and run. Good luck, Dan
joninnj	#7  Posted on 02/13/09 - 7:28 PM
Member Personal Page Posts: 408 Comments: 3 Joined: 06/07/07	If properly maintained and not abused an outboard can last run much longer than 1000 hours. This is of course if used primarily in fresh water. Many factors other come into play... age is another factor... a well maintained engine that has been sitting idle for years with low hours may be ready for junk pile if not properly stored for example...
MW	#8  Posted on 02/13/09 - 9:58 PM
Member Personal Page Posts: 1827 Comments: 10 Joined: 01/08/06	In my area avg. is about 50 hrs per summer, so that engine should be in fairly good shape (hour wise). Should still be checked out by a Marine mech.
mrengles	#9  Posted on 02/19/09 - 5:49 AM
Member Posts: 19 Comments: 0 Joined: 02/09/09	TexasOutrage wrote: I'll second John's post. 140 hrs is considered low hours. My only concern with used motors lately would be hurricane damage/submersion. Have a mechanic check it out. What type whaler is it on? The motor was on a 1970 Katama, overhauled or converted to a Montauk. 2005 Montauk 170 - 90 HP Mercury Saltwater Series