Honda 2hp four stroke not pumping water - help please!

[npf1]

Hi - I' recently bought a used little Honda 2hp four stroke and it's not pumping water. Should it be or is it aircooled? It's a few years old but is silver, so not totally ancient.

If it is water cooled, I'm quite happy to fix it myself but I've never stripped down and outboard before. Can anyone explain what I need to do? Any possible quick fixes, such as squirting in something to disolve the salt? Or does anyone have the workshop manual and can send me a copy of the relevant pages?

Many thanks in advance.

 

[Csail]

It is aircooled but when running the leg still needs to be in water.

 

[davidbains]

As csail says it's air cooled. I do run mine for several minutes on the pulpit if nec.
The main problem with them, (apart from the diff to locate plugs) is the fact that
the carb tends to gum up, especially if you store the engine on the wrong side. Best to keep it vertical.

 

[pessimist]

Sorry to disagree, but the earlier 2hp 4 strokes were water cooled. I know I'm not dreaming - I have one in the garage.

Quite easy to tell them apart, the cowl is markedly different. Any chance of a 'photo?

 

[npf1]

Thanks - I'll post a pic this evening.

 

[Phoenix of Hamble]

The aircooled Hondas are marked quite clearly on the cowling with (unsurprisingly) "aircooled" /forums/images/graemlins/grin.gif

 

[Csail]

Is it this one?
http://images.google.com/imgres?imgurl=h...I7GWYA%26sa%3DN

 

[wiggy]

definately aircooled

 

[npf1]

The bottom cowling is black not grey. Like the one halfway down the page here: here

 

[pessimist]

That is definitely water cooled. If this matches your engine then your original question stands.

Cheers,

Colin

 

[sailorman]

the exhaust & leg are water cooled i belive by the shaft action sucking-up water.
the rest is bog standard "Lawnmower"

 

[billcowan]

Horrid thing.

I have one, it is shite
very noisy, vibrates, weighs tons, has a snatchy centrifugal clutch, and it suppurates oil whatever way up you try and store it.

Get a Yam 2 stroke - miles better (Have one of these as well. it has even ran underwater on occasions, and its been put in D.Jones's locker several times.

 

[Gin]

I'm not sure what has been concluded from this but in case this helps- apologies if it doesn't-


I too bought a secondhand Honda BF2 1995 model, constant in-gear, not the newer centrifugal clutch. The chap told me it was aircooled(no legend on the cowling) and demonstrated it to me. It had a grey cowl and a black powerhead base but not the bulbous base you refer to in the website link- that is the centrifugal clutch type I guess

It served me well until I foolishly let the gear box run dry and I mashed the thrust pinion(the vertical gear wheel at the bottom of the prop shaft inside the leg.

When I removed the gearbox cover(after first removing the prop) I then had to use a drift to knock the lower section of the outer leg casing downwards to force the thrust pinion off the vertical drive shaft- it isn't otherwise possible to extract the horizontal bezel (reduction) gear which drives the prop.

Having done this I was then able to remove the vertical drive shaft at which stage, to my surprise, I found a rubber water impeller mounted on said shaft and held in place by a removeable dowel spigot. In other words the powerhead was aircooled(I think) but the leg was water cooled and I never knew it as the handbook I had, referred only to the aircooled variety.

I've since been told that if this type is allowed to run without water cooling then the heat generated by the exhaust causes terminal damage to the piston which becomes overheated

 

[npf1]

Gin - yes, sound like the same engine. Better get my tools out! Or could I get away with blasting it with a hose pipe?

Thanks everyone for the input.

 

[sailorman]

My Dear Chap /forums/images/graemlins/blush.gif
i do NOT have one of the NASTY things /forums/images/graemlins/shocked.gif
i have a Tohatsu 3.3 /forums/images/graemlins/wink.gif /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif
& a Mariner 2hp /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif( my spare )

 

[Rabbie]

Maybe yours was as you describe, but the one I had was a super wee engine and had none of the faults you mention. Don't tar them all with the same brush. Anyway, npf says he has bought one!.