Yamaha 225 4 stroke 2004 leaking oil.

[DrewBanozz]

Hi. I have a Yamaha 225 4 stroke 2004 leaking oil. It has only 360 hrs. When the engine is stoped a largish patch of oil surfaces and remains for up to 15 minuates. Could it be the lower crank seal leaking?

Thank you

[greasyshaft]

Could be leaky crank seal (which is housed within the oil pump) best way to tell is to drop the gearbox and check for engine oil on the driveshaft.
Has the engine had an oil change recently? it is very easy to spill oil into the engine pan when changing the filter leaving behind residual oil.

[fairdeal]

could be several things, but on this particular engine...

read this thread

http://www.yamahaoutboardparts.com/f...l-th23383.html

[DrewBanozz]

Had an oil change last year but only used for 5 hours since. Also the previous owner had reported a service done in 2013 where oil was filled to the top of the dipstick. Hope this did not effect any parts due to pressure?
If the crank oil seal needs changing is it something that can be done easily?

Will read the other thread in the mean time tks.

[TownsendsFJR1300]

If its the lower crankshaft seal, the engine has to be removed from the mid section...

[DrewBanozz]

Can you recommend a good manual as I would like to do this job myself?

[fairdeal]

Can you recommend a good manual as I would like to do this job myself?

The "official" Yamaha service manual LIT-18616-02-76 is of considerable help.

I see there's a couple for sale on eBay right now.

You can also find & buy a digital copy online, if you can work with that.

Now, if you can find a Mercury manual for their 225 four stroke of that year - the manual code # is 90-888465 - it contains all the info of the Yamaha manual - those Mercury engines WERE Yamahas

plus, it has some better drawings, and there's no "pigeon english"

[DrewBanozz]

Thank you.

[rodbolt17]

its not pigeon its jinglish.
and yes the old merc 225 4 stroke manual was a bit better than the Yamaha version.

if you suspect a driveshaft/oil pump seal leaking why not simply use a flash light and look at the shaft oil pump area.

if its dry its not the shaft/oil pump.

eyeballs and flashlights are good tools.

the tool on the end of the spinal colum is the best one.

[DrewBanozz]

Just Removed the gear box and seems like the shaft is full of oil so I imagine it is the lower crank seal that needs changing?

[fairdeal]

If its running down the driveshaft, yes, most likely.

"A Yamaha-specific repair sleeve has been developed to repair seal wear on the F150, F200, F225 and F250 crankshafts. These models utilize an oil pump that is driven by the lower end of the crankshaft. Oil leakage is con*****ed by a double-lip oil seal in the oil pump housing. Seal wear grooves may develop on the crankshaft seal surface due to environmental conditions and usage patterns leading to oil leakage down the driveshaft. To minimize repair time and expense, the Yamaha-specific repair sleeve for this specialized application can be installed on the crankshaft to provide a new seal surface without requiring replacement of the crankshaft. Installation of the repair sleeve requires removal of the powerhead assembly and removal of the oil pump from the crankcase. No further disassembly of the powerhead assembly is necessary. Yamaha recommends replacing the oil pump, related seals, and gaskets when installing a repair sleeve "

part # MAR-CRKSL-VE-00 CRANK REPAIR SLEEVE

[fairdeal]

Is this oil seal leaking" issue common to all F225s/250s or just the engines built in 2002?

I've seen "anecdotal" reports up through 2005, but know no more than that.

hopefully Rodbolt will enlighten us!

[boscoe99]

Is this oil seal leaking" issue common to all F225s/250s or just the engines built in 2002?

It is common to all F150s/F200s/F225s/F250's that came from the factory without the stainless steel collar (seal wear strip) being installed on the crank shaft from the factory.

[fairdeal]

It is common to all F150s/F200s/F225s/F250's that came from the factory without the stainless steel collar (seal wear strip) being installed on the crank shaft from the factory.

so, until "some time after" engines were no longer identified by "model year"

or "sometime after the 2005 model"

[boscoe99]

so, until "some time after" engines were no longer identified by "model year"

or "sometime after the 2005 model"

The parts catalog contains the answer.

Engines with a production date of 0308 (March 2008) and earlier did not have the wear collar installed. Engines with a production date beginning in 0408 (April 2008) got the collar in production.

And for whatever it is worth, the collar installed in production is not the exact same collar that is specified via the Yamaha retrofit bulletin. The differences in the collar necessitate a different oil seal be installed. Just use whatever the parts catalog for a specific production date motor says to and all will be OK.