1974 6hp yamaha outboard

[Jordan112]

Hi, im new here and been browsing the forums for a couple months, ive recently bought a 6hp yamaha from 1974 i had it out on my sib and it runs great but on the last launch the waves were a bit rough and a wave actually came over the transom and flooded the boat along with the engine, i started to dissassemble everything yesterday and 1 out of 6 bolts have sheered to my luck it was the one at the bottom which i cant get a drill in, ive undone all the underside bolts to try and release the lower part that holds the cowling in place it seems to move but obstructed by a bolt that is rounded off, everything on the engine is fine, although im going to rebuild as the engine is so old, i have found parts so im not worried about that also i have ordered a bolt extractor thats arriving today, my other option is to take my arc welder and weld a bolt onto the bolt but id rather not as the splatter and the heat may dissfigure the actual head, has anyone had any experience with these type of problems? Any help would be appreciated, im also thinking of repainting the whole unit including the shaft left and the engine and cowling and all the rest

 

[Seastoke]

Buy another.

 

[BruceK]

Why are you doing all this for a wet engine?

If it#s a fixer upper I'm inclined to agree

Buy another.

No more desperate feeling in the world that having the dink motor die on you while the wind blows you offshore despite rowing like a mad man. I've tipped better engines that your over the side to lighten the rowing load.

 

[Bigplumbs]

I am afraid you have posted this in a forum where many people have so much cash they Offton don’t work on their own boats and also think that a few thousand is chicken feed.

keep working on the engine I say and if it is reliable as many older 2 strokes are all should be good. You might be advised to find a sib forum to post this on also

 

[BruceK]

Dont be so disparaging, that is not true of either respondents and my argument is his life is worth more than the reliability of a 47 year old small engine of unknown provenance. When it comes to SIB's at sea there is no redundancy to that engine. Certainly oars are very unreliable except in the most benign conditions. There is a fundamental difference between advice and encouragement.

 

[Bigplumbs]

Dont be so disparaging, that is not true of either respondents and my argument is his life is worth more than the reliability of a 47 year old small engine of unknown provenance. When it comes to SIB's at sea there is no redundancy to that engine. Certainly oars are very unreliable except in the most benign conditions. There is a fundamental difference between advice and encouragement.

And a fundamental difference from trying to be the big I am and claiming you have chucked better engines than that over board which if true is both irresponsible and rather stupid.

very old 2 strokes can be and often are very reliable

 

[northwind]

Hi, im new here and been browsing the forums for a couple months, ive recently bought a 6hp yamaha from 1974 i had it out on my sib and it runs great but on the last launch the waves were a bit rough and a wave actually came over the transom and flooded the boat along with the engine, i started to dissassemble everything yesterday and 1 out of 6 bolts have sheered to my luck it was the one at the bottom which i cant get a drill in, ive undone all the underside bolts to try and release the lower part that holds the cowling in place it seems to move but obstructed by a bolt that is rounded off, everything on the engine is fine, although im going to rebuild as the engine is so old, i have found parts so im not worried about that also i have ordered a bolt extractor thats arriving today, my other option is to take my arc welder and weld a bolt onto the bolt but id rather not as the splatter and the heat may dissfigure the actual head, has anyone had any experience with these type of problems? Any help would be appreciated, im also thinking of repainting the whole unit including the shaft left and the engine and cowling and all the rest

Don't bother with the bolt extractor, it will break, welding onto it will work better as the heat will help break the galling that has happened between the Ali and stainless bolt. Or heat it up and then spray penetrating oil on it, let it cool and repeat a few times before tying to move it

 

[billskip]

Hi, im new here and been browsing the forums for a couple months, ive recently bought a 6hp yamaha from 1974 i had it out on my sib and it runs great but on the last launch the waves were a bit rough and a wave actually came over the transom and flooded the boat along with the engine, i started to dissassemble everything yesterday and 1 out of 6 bolts have sheered to my luck it was the one at the bottom which i cant get a drill in, ive undone all the underside bolts to try and release the lower part that holds the cowling in place it seems to move but obstructed by a bolt that is rounded off, everything on the engine is fine, although im going to rebuild as the engine is so old, i have found parts so im not worried about that also i have ordered a bolt extractor thats arriving today, my other option is to take my arc welder and weld a bolt onto the bolt but id rather not as the splatter and the heat may dissfigure the actual head, has anyone had any experience with these type of problems? Any help would be appreciated, im also thinking of repainting the whole unit including the shaft left and the engine and cowling and all the rest

You could try cutting the head off the bolt and removing the component, then try removing the stub?

 

[BruceK]

And a fundamental difference from trying to be the big I am and claiming you have chucked better engines than that over board which if true is both irresponsible and rather stupid.

very old 2 strokes can be and often are very reliable

You have absolutely no idea what you are talking about, have no knowledge whatsoever of the scenario but delight in being a troll while waving a flag that you're wearing the little boy pants. Or is that nappies?

 

[R400]

I’m with you dennis
not everyone can afford to Chuck stuff away
OP it’s worth a try and lots of help on this site

 

[Kilo]

I'd second Northwind's suggestion, don't bother with the extractor, more trouble that it's worth.
Welding seems like a good option, heat shouldn't be a problem for the head but other bits close to the bolt might suffer - especially the plastic. In extremis but on a motorcycle I've cut the plastic round the bolt head with a hole saw & repaired that later.... Lesser of two weevils.... A horrible bodge but by that time I was practically weeping with frustration. I feel your pain, good luck.
& FWIW, a well looked after 2 stroke will be fine possibly even more reliable than a way more modern engine that's been abused.

 

[Bigplumbs]

You have absolutely no idea what you are talking about, have no knowledge whatsoever of the scenario but delight in being a troll while waving a flag that you're wearing the little boy pants. Or is that nappies?

you can always tell when someone has lost the argument you seem obsessed with big boy trousers also it seems

As I said old 2 strokes can be very good and very often more reliable than more modern 4 strokes with all their complications

I have more than 12 outboards from 2 hp to 200 so probably know a thing or two. We can perhaps leave it to the op as to who he takes advice from