"A COUPLE OF QUESTIONS. This
"A COUPLE OF QUESTIONS. This motor had this problem when you bought it, meaning that it had never been fixed but is as it was when you bought it, right? was this boat stored for a while and hadn't been used, or had it been used on a regular basis, or do you know?
the top plug looks like it has oil and grease on it, is that what it is, or is it gas? remember there is oil in the gas too. when you say the bottom one looks like it just came out of the box, does that mean it looks new like it has never been fired or does it look like it has been used but is spotless clean with no black or build up at the electrode? next is the rpm... the rpm does go up you just don't know how high or how high it should be right? when you are trying to go and give it full throtle does it just feel like no power or does it feel like a car that the clutch is slipping on? this motor will run and sound fine on one cylinder, but the rpm response will be slow.
This is what i would do, since you don't really know this motor. start with a compression test, but most importand do a leak down test, that will tell you if you are losing compresson at rings and most important seals. you can get a leak down tester at harbor freight for under $30, while your there get a spark tester because that is what you need to do next. they are under $10. goes on spark plug with a lead to the plug wire and will show spark. check for spark, what does the spark look like at the plug, does it look weak or is it crisp and blue. just because plugs are new doen't mean that they aren't questionable, along with what is making them work.
An important question is, was this boat stored for a while before you bought it, or was is used on a regular basis? if it was stored for a while, my guess would be the fuel pump. also, if it had been stored for a while, change the impeller in the water pump, BEFORE you go out and start using it. a cheap and easy job that will protect your investment more than anything else you can do, other than keeping the 2 stroke oil in it.
after the motor has run, do both plugs feel hot? if you put your hand on the top and bottom cylinder, do they both feel hot or is one cooler?
if the top clylinder has spark but doesn't feel hot after the motor has run for a few min. along with it being wet... check the fuel pump. it works off of the top cylinder and if there is a hole in the diaphram it will put gas into that cylinder, to much gas and it won't fire.
if both cylinders have spark and are hot, and one has a clean, clean looking plug... it indicates warer in the cylinder. water turns to steam and that is why plug is clean.
if the motor is running good and it feels like the clutch in a car is slipping... lots of rpm but no mph.... check the prop. the prop has a rubber core and sometimes they separate and the prop will not spin like it should.
REMEMBER. spark, fuel, compression. those are the three things that make a motor work, check them in that order.
DO YOU HAVE A MANUAL? If you don't have a manual, then don't work on your motor! I was talking to him the other day and God told me that he uses two manuals when he works on his Harley.
would you want someone to operate on you that had never read a medical book?"
