firstascent2002
New member
My 3.3 has a 5 year old impeller. Still pumps water well...the "book of words" says to change it at every service every year...what do other people do?
J
J
How often do you change your ob impeller?
- Thread starter firstascent2002
- Start date
Harry25
Member
Tell tale
Keep an eye on tell tale if it doesn't good a good flow and it's not blocked then I would change it. Otherwise I would leave alone.
Keep an eye on tell tale if it doesn't good a good flow and it's not blocked then I would change it. Otherwise I would leave alone.
Sans Bateau
Well-known member
Every year!?
Better do mine then. Havent changed it since I bought it. That'll be in about 1997!
sailorman
Well-known member
never changed one to date
my tohatsu 3.3 now 7 yrs old the Yammi 2hp 25 > 30 yrs old
VicS
Well-known member
I suspect very few people change them annually.
After five years its worth keeping a good eye on the pee stream. Or changing it anyway.
Left for too long there is a risk that a vane or two could break off and block the cooling system!
If the water pump is located behind the prop ( but that can only be so in fixed drive models) there is no excuse for not changing it regularly.
How often do you change the impeller in the seawater pump of an inboard engine?
After five years its worth keeping a good eye on the pee stream. Or changing it anyway.
Left for too long there is a risk that a vane or two could break off and block the cooling system!
If the water pump is located behind the prop ( but that can only be so in fixed drive models) there is no excuse for not changing it regularly.
How often do you change the impeller in the seawater pump of an inboard engine?
doug748
Well-known member
My last 2.2 hp Tohatsu went 15 years without, before I sold it.
The Johnson one on the Beta inboard falls apart in about 9 months.
The Johnson one on the Beta inboard falls apart in about 9 months.
C
catalac08
Guest
My main engine, a Tohatsu 30hp changed impeller after 3 years/300hrs and there were faint cracks starting to develop at the root of the vanes on the impeller. Changed then after 2 more years 2yrs/200 hrs and impeller looked immaculate. Had a 3.5 tohatsu for tender and not changed in 5 years but probably only 50hrs total usage. Had a 2hp Yamaha for 12 years and never changed impeller. I think if outboard is your main engine it is important not to fail so I think every 2 years/200hrs is prudent perhaps stretching to 4 years if you do less than 80 hrs per year. I suppose type of usage is also relevant i.e. if engine is often flat out then that will create more wear and reason to change more often.
greenalien
New member
The problem with most small outboards is that the internal fastenings , unless removed and greased regularly, will seize up.
A simple job like changing an impeller then becomes a nightmare of broken studs and, if you're really unlucky, a broken water feed pipe ('cos it will have seized in the impeller housing and instead of sliding free, will pull out of the cylinder head instead).
While ignoring the need for regular servicing is something you can probably get away with for a few years, it's a false economy in the long run.
A simple job like changing an impeller then becomes a nightmare of broken studs and, if you're really unlucky, a broken water feed pipe ('cos it will have seized in the impeller housing and instead of sliding free, will pull out of the cylinder head instead).
While ignoring the need for regular servicing is something you can probably get away with for a few years, it's a false economy in the long run.
ghostlymoron
Well-known member
I've never changed the impellor on my British Seagull Featherweight. I believe it is the original from 1965. If it was a rubber one, I'd look at it every 3yrs or so.
DownWest
Well-known member
Yeh, Seagulls are a special case.
On a Suzuki 6 the problem was finding one around here. A mail order outfit in Bury st Edmunds kept me waiting (after debiting my card) before admiting they couldn't find one. Three French sites came up with nothing, so I was reduced to calling every service agent in the Yellow pages. Worked in the end.
On a Suzuki 6 the problem was finding one around here. A mail order outfit in Bury st Edmunds kept me waiting (after debiting my card) before admiting they couldn't find one. Three French sites came up with nothing, so I was reduced to calling every service agent in the Yellow pages. Worked in the end.
Blue Fox
Member
Don't wait to long changing the impellor! My 6 hp Yamaha seized suddenly after becoming quite hot - impellor broken, couldn't move anything. My mechanic said I was lucky he was able to get the cylinders going again.
PeterGibbs
New member
Take it out and examine it closely:
Are there any signs of fracture at the root of the blades? Both sides.
Are there any parts missing from any blade?
Is there any sign of disconnection between the metal hub and the "rubber" blade structure?
If all good, put it in your spare box, and put in a new. No one should excpect an impeller to be 100% reliable at 5 years - I submit. Really not worth the hassle.
PWG