Mercury 25HP Impeller Replacement

[KeltonKrew]

I'm getting a 25hp Mercury OB. approx 5-8 years old and only ran once in a 55gal drum. should I change the impeller?<br /><br />Any ideas or quick bullet list on how to change it?<br /><br />Thanks

 

[ehenry]

Re: Mercury 25HP Impeller Replacement

Yes, change your impeller.

 

[Spidybot]

Re: Mercury 25HP Impeller Replacement

For obvious reasons you should get a manual. Will prove valuable now and in the future.<br /><br />Try a search on these forums.

 

[KeltonKrew]

Re: Mercury 25HP Impeller Replacement

I plan on getting a manual. Anyone have a simple bulleted list to get me started.<br /><br />i.e. drop lower unit (how)<br />remove linkage<br />find impeller?<br /><br />How long should this take

 

[mellowyellow]

Re: Mercury 25HP Impeller Replacement

it's very easy IF you know what you're doing!<br />been told 20-30 min... local mech. tells me the <br />book allows 2.5hrs labor. I had a manual, studied<br />it for a few days, and it ended up taking me all weekend <br />I have a 115hp short shaft with an extender and I<br />didn't even know such a critter existed!<br />I needed a 7" 3/8 hex wrench just to reach the<br />last screw.<br />feces occurs......<br />bottom line, get a manual and take it slow. make<br />sure you understand how to match up the shift<br />spline or she won't even go back on. (another story)<br />now this job will take me (novice) probably 2<br />hours or less, which is the good that comes out of it.<br />good luck,<br />M.Y.

 

[KeltonKrew]

Re: Mercury 25HP Impeller Replacement

Thanks. I've re-built diesel tractor engines with only a manual to go by, so I should be able to do this. I just hate paying someone $125 to do something that I can do in a reasonable time frame.<br /><br />I'll be back with more questions as this is my first boat!

 

[Spidybot]

Re: Mercury 25HP Impeller Replacement

KeltonKrew, - sure you'll have more questions and many here loves to answer.<br /><br />For one you must be the right to appreciate a manual, and it really changes the task from nightmare to 'piece of cake'.

 

[enn]

Re: Mercury 25HP Impeller Replacement

To change the impeller could take anything from 0,5 to 3 hours depending on how coroded the bolts etc. are. I have changed quite a few and with the right tool and a manual it takes 20-40 minutes.