NicM
Well-Known Member
Has anyone got a service manual for a Mariner 4hp outboard circa 1980's either to loan, sell or know where there is a download.
Many thanks
Nic
Many thanks
Nic
Mariner Service Manual
- Thread starter NicM
- Start date
Csail
N/A
Not got time now, off for a meal but google Mercury or Mariner, they are the same.
NicM
Well-Known Member
Was pointed in the right direction over on the PBO section but it may be useful to others
http://www.ybw.com/forums/showthread.php?t=233243
http://www.ybw.com/forums/showthread.php?t=233243
Pigpen
Well-Known Member
Did you find the exact model (2-stroke, 4 HP) or did you, like me, settle
for the nearest found (4.5 HP). There can't be that much difference!
Doug
NicM
Well-Known Member
Poped the serial number into the second website, found age to be 1989 and then put this info into first website and found the exact owners manual. Exploded diagrams on other website were very helpful but the number of unavailable parts were a bit worrying.
Didn't find a workshop manual but with hindsight the owners manual was enough.
Didn't find a workshop manual but with hindsight the owners manual was enough.
Bosun Higgs
N/A
Thats one of the few advantages of Seagull - that and corrosion.
Best thing to do with a Jap OB of that age is to ebay it or boat jumble it. Trying to keep it up to scratch will be pushing water uphill
NicM
Well-Known Member
I accept that as a general statement but I know the history of this engine and it has only done a couple of hundred hours, if that, and you can eat your dinner of the engine. However, as it has been used as an auxillary spare on a sailing boat the paint will be flaking shortly in a few places. Just the time for a strip down, service, touch up a few areas and ready for another twenty years!
Bosun Higgs
N/A
My 3 hp Mariner of about the same vintage expired through corrosion - you'll find that the wall thickness of the cylinder head castings isnt great.
One issue I found was that the impellor ran inside a pressed stainless steel cup which sat in an ally casting. As time went on, salt and corrosion products squeezed the stainless cup causing the pump to bind and the engine to be very difficult to start. The cure was a new cup bedded into Duralac.
very reliable engine - just corroded.
One issue I found was that the impellor ran inside a pressed stainless steel cup which sat in an ally casting. As time went on, salt and corrosion products squeezed the stainless cup causing the pump to bind and the engine to be very difficult to start. The cure was a new cup bedded into Duralac.
very reliable engine - just corroded.
SAMYL
Well-Known Member
I have an old copy of Sailing Today which has an article about servicing a 2-stroke outboard and it covers your actual engine - same as mine.
If you let me have your address I will post the article to you.
I found mine in a skip at the local dump! It was seazed and had obviously been for a swim but I stripped it and reassembled - started second pull and still going strong!!
The Tohatsu 4 is the same engine I think.
If you let me have your address I will post the article to you.
I found mine in a skip at the local dump! It was seazed and had obviously been for a swim but I stripped it and reassembled - started second pull and still going strong!!
The Tohatsu 4 is the same engine I think.