View and download mercury 225 optimax dts installation manual online. You may also visit the boat motor manuals section of our site to obtain a service manual. Rather than injecting fuel into the crankcase like the previous 2stroke motors offered, this motor uses a combination of high pressure fuel and high pressure air to inject an atomized mixture of gas directly into the combustion chamber. The boating forum compression for 225 mercury efi offshore 1998 hello, can. Mercury optimax 250 service manual pdf download manualslib. Aug 20, 2011 for instance, a production 225 optimax runs 80 psi fuel pressure in the fuel rails. View and download mariner 5 optimax service manual online. Also recheck with a different gauge as the one used may read low. Had my plugs and lower unit changed today on my optimax, we also did a. Engine compression should be checked with engine block warm, throttle. Mercury 225 optimax dts installation manual pdf download. Merc says 110 to psi is normal on a warm engine with throttle. May 23, 2018 the optimax air compressor is the secret to the optimax s excellent performance. Provides timely service for all mercury marine customers.
Mercury outboard service manual free download pdf boat. Jan 15, 2014 im looking to purchase a new boat with a 2002 200hp optimax with roughly 490 hours. It was one of three on the back of a big donzi or a fountain or something like that, originally rigged in 99. Its highly recommended to always use a outboard repair manual for your specific year and model outboard engine when preforming a cylinder compression test on your motor. Possesses all necessary service tools, test equipment, manuals, and parts. Mercury tech compression spec for 2000 mercury 225 optimax. This outboard motor manufactured by mercury marine, fond du lac, wi, usa or marine. You are right, these opti have 1 x sealcylinder head and 3 x sealcylinder bore that look like orings. Optimax 150 air compresser destroyed general discussion.
Recommended oil mercury optimax dfi outboard oil tcw3. Please read this manual carefully before operating your outboard. Low water pressure the bell and water pressure icons are displayed. Cylindertocylinder compression readings that differ more than 10% reveal trouble. The main thing to check is the difference between cylinder compression. Possesses all of the necessary service tools, test equipment, manuals, and parts books. Sometimes having compression as low as 80 and 90, the engine will still run great. Aug 17, 2016 i have a 115 hp mercury optimax 2006 with low compression in one of three cylinders.
View and download mercury optimax 115 service manual online. What should this motor have for compression with these low hours, or am i being scammed and the motor really has 500 or more hours thanks. Fuel induction system 2stage direct fuel injection dfi alternator amp 60 amp 756 watt beltdriven gearcase ratio 1. I have a 115 hp mercury optimax 2006 with low compression. The mercury optimax motor is very different from conventional 2strokes, and the motors previously offered by mercury and mariner. What compression should i expect on a 1999 225 hp mercury optimax that was rebuilt in 2009. Mercury optimax 115 service manual pdf download manualslib. Refer to determining recommended outboard motor mounting height, preceding and. Any drop in air pressure will dramatically reduce engine performance. Mariner 5 optimax service manual pdf download manualslib. Engine compression should be checked with engine block warm, throttle shutter wide open, all spark plugs removed and using a fully charged battery. Mercury 200 optimax jet drive service manual since 2001 pdf, eng, 16. The air compressor builds about 80 psi of air pressure in the fuel rails.
All systems, fuel, electrical, cooling, controls, powerhaed power trim and tilt, upper and lower units, specs, full color wiring more. This service manual has been written and published by the service. Mercury optimax fuel system canadian fuel injection service. Four strokecycle engines produce much higher compression. Compression test should be run with the engine at operating temp, and with the.
How to compression test on mercury 2stroke outboard engine. I would recheck the compression and make sure it is done correctly, there is a right way and wrong way. View and download mercury optimax 250 service manual online. Section 1a specifications a table of contents master. This is balanced by an air pressure regulator to be 10 psi less than the fuel pressure. Man, i did a compression test today on my 2000 mercury. Get instant online access to repair manuals for your mercury mariner. Electric fuel pump pressure, if used in conjunction with engine mechanical fuel pump, must be limited to no more than 4 psi 27.
Manual for further explanation of the problem and the correct action to take. What compression should i expect on a 1999 225 hp mercury. I am looking at buying a merc outboard 1997 250 hp efi with an hour meter showing 178 hours. View and download mercury 225 service manual online. It was only ran a few times before the owner went to 250s. Terms of service do not sell my personal information. Important information, including correct service procedures, specifications, pictures, illustrations and safety precautions may be included. Use transom drilling fixture 9198234a2 or attach tape engine mounting template located in this manual to boat transom. The specification printed in the service manual is 110 to 5 psi. Download service manuals mercury suzuki yamaha johnson.
Compression for 225 mercury efi offshore 1998 the hull truth. Jul 02, 2018 older two cycle outboards, especially low horsepower, can run fine around 60 psi however above 90 psi is optimal. Maintenance, replacement, or repair of the emission control devices and systems. The most likely issue with that cylinder is the injectors are clogged and the engine or at least that cylinder is running lean. As we stated earlier at the beginning of this article. Twostroke engines should have a compression reading of around 110 psi. I have a 225 optimax 1999 modal and is low on compression fixya. Engine overheat the bell and temperature icons are displayed there is insufficient water pressure in the cooling system. I have a 225 optimax 1999 modal and is low on compression can you pull the pistons out buy undoing the end caps through the intake mana fold or do you have to split the moter in harf. Mercury optimax 225 outboard service manual pdf download. There is insufficient water pressure in the cooling system.
Mercurys new optimax 225differnce from the proxs motor. Mercury optimax service repair manual 200 225 tradebit. And the one at one at 7580 psi indicates there is likely an issue going on with that cylinder. Compression test should be run with the engine at operating tem. Engine compression should be checked with engine block warm, throttle shutter wid. Merc manual states max delta is 15 psi between the highest and lowest cylinder. Compression test is specified with throttle wide open, block warm and fully charged battery. Mercury 225 service manual pdf download manualslib. Everything you need to know about outboard compression tests. If both are running fine i would do a powertune or deep creep cylinder soak overnite to free up rings if sticky and start running quickleen in your fuel. All the history i have on this motor is from the owner. Employs at least one certified or master technician. The air side of the fuel rail is regulated at 10 15 psi less pressure than the fuel side, this.
If you have a dirty old paper copy of this manual or a pdf copy of this manual on your computer and it crashed we can help. I took compression readings on all cylinders with all plugs removed. If a compression test was answered by a verified marine mechanic we use cookies to give you the best possible experience on our website. Is it conceivable that just a bad oring can create this great compression lost. Is your engine properly registered for warranty purpose. Your mercury optimax 225 outboard service manual will come to you in pdf format and. What are normal compression readings on a 1999 optimax 200. Normal compression for all cylinders should be 110 to psi 758.
Mercury optimax 225 outboard service manuals are available for immediate download. Seloc marine repair guides for mercury engines online and. Refer to your operation and maintenance manual for full details of your warranty. Fuel pressurevacuum gauge 015 psi obtain locally 57721.
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