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2007 Honda 225 4 stroke outboard randomly misses between 2500 & 2900 rpm.

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The first and easiest thing to do is replace the spark plugs and gap them. After that is it a guessing game for electrics or fuel delivery. My advice for marine engines is always professional service as the consequences of breaking down on the water are always a problem. The engine is only 10 years old so it probably has onboard diagnostics. The engineer connects it to a computer and it tells him what is wrong.

Posted on Aug 09, 2017


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Posted on Jan 02, 2017

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SOURCE: tune up specs for honda outboard

You have probably already found an answer, but all the specs are in the owners manual. If you do not have one, you can download one for free from under the owners section. You will only need the serial number for your engine.

Posted on Aug 10, 2009

  • 14 Answers

SOURCE: won't run much raster than idle speed

Since there is no background to this, I assume at some point in time, the motor ran ok for you...

The first thing to do is to drain one of your carburators into a glass jar to check for water. If there is water, you will see it separate from the fuel in a couple of minutes. The water is on the bottom. If there is water, you will need to flush the motor with good fuel, one carburator at a time and probably will have to pump your tank.

If there is no water, the easiest thing to try is the following...when the motor starts to bog down, activate the choke. (If you have a side mount box that activates the choke when the fast idle lever is all the way up), you will have to have someone go back to the engine and manually pull the choke lever out. If the motor picks up, the motor is most likely in need of a carb job.

You can then do a cylinder drop test while motor is idleing, momentarily pulling the spark plug wires off of the spark plugs one at a time. If you pull one off and the engine speed does not change, listen for spark at the spark plug connector to the engine. If you hear the clicking of spark spark is probably ok. The issue with that cylinder is probably fuel related...probably a clogged carburator. If one carb is not functioning correctly, they all probably need some work. If you are not into mechanical stuff, you should have a dealer do the work. After the carbs are cleaned, they need to be adjusted for proper idle and idle/air mixture as well as vacuum balanced . If you are going to attempt it yourself be sure to by a manual either from Honda or one after market.

Before the carb job, a good dealer will always do at least a compression and spark check to be sure there is not an internal issue. The spark plugs should be checked at this time and changed out if they look questionable. Only use NGK DR7EA spark plugs not a substitute.

Also, check your oil and be sure it is clean and at the proper level.

There are several other things that it can be, but this is the most common.

Posted on Aug 10, 2009

  • 53 Answers

SOURCE: yamaha outboard 150 4 stroke bad vibration at 700

is you propeller bent? a dent the size of a quarter will cause a shake. If not that means your engine is misfiring. here are the troubleshooting test and tool list you need to find out. Tools(1) A compression gauge (2) a spark gap tester.(3) A Clymer service manual for your engine. (you can purchase from your local outboard dealer. I know all these are expensive but if your going to be a outboard tech you will always need them. Troubleshooting (1) check compression. without the year model I'm giving you a average numbers. Look at your Clymer manual. all cylinders need to be over 100 lbs and equal each other within 5 lbs.(2) check spark. use a spark gap tester all cylinders should jump a half inch gap. if you have good compression and good spark, fuel is the problem nine times out of ten.Ethanol gas is proven to stay stable in fuel systems for 30 days in 90 + degree heat. Drain gas tank,clean fuel lines replace primer bulb and replace all fuel filters. Yamaha has a gravity filter under engine coul clean it. Finally replace spark plugs, I know spark plugs probably don't look bad but this is a outboard. Fresh spark plugs means less resistance for the ignition system. The ignition system is week compared to automotive. Test drive boat, if the problem is still there then there is further steps to take. Again I don't know the year model so I guessing its fuel injected. Pull out your clymer manual. what is great about the Clymer Manual for Novice techs is it gives detailed info on your outboard. Troubleshooting tips and teaches you how your outboard works.

Posted on Nov 03, 2009

  • 53 Answers

SOURCE: I have a 2009 40hp 4 stroke outboard. It sounds

not enough info. what Manufacturers and model? is it out of warranty? here are some troubleshooting tools and procedures since labor rates at your local dealer could be up to $100.00 per hour. before you start I have two Goals for you. (1) If you learn everything you can about your engine you will become more confortable and enjoy it more. (2)confirm that your engine is ok now. is the noise your hearing piston related, or is it ignition missfire. the compression check and the ignition output test will help answer that. Tools(1) A compression gauge (2) a spark gap tester.(3) A Clymer service manual for your engine. (you can purchase from your local dealer). I know all these are expensive but if your going to be a outboard owner you will always need them. Troubleshooting (1) check compression. without the Manufacturer I'm giving you a average numbers. Look at your Clymer manual for specifics. all cylinders need to be over 100 lbs and equal each other within 5 lbs.(2) check spark output. use a spark gap tester. all cylinders should jump a half inch gap. If all these test prove that the basic operation of the engine are within specification, then we can turn to fuel delivery. unfortunately you didn't give the Manufacturer so I can't give you the troubleshoot procedures for the fuel delivery system. you will need to refer to the manuel. please get Clymer manuel you will apreciate it

Posted on Nov 04, 2009

  • 54 Answers

SOURCE: what is the maximum RPM's that I should be safely

I am not an expert for Johnson but with most 2 strokes about 5100.

Posted on Nov 28, 2009

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