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Old 10 March 2009, 10:55   #61
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An update...

I have not done anything on the engine for a few days because I have encountered trailer brake issues

Anyway, I need to take the block off which doesn't look like too bad a job. I have already successfully loosened the block bolts so I know they'll come out.

At the moment I am not holding out much hope of saving the engine so am seriously considering buying another one (90hp) and then selling all the tohatsu parts which I think I could get decent money for (maybe even nearly as much as selling the engine complete, just a lot more hassle!). Only thing is, I'm jobless which means I can't justify outlay for another engine until I secure a job
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Old 10 March 2009, 10:57   #62
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I remember some people laughing at me when I said it wasn't good engineering practice to put steel bolts straight into alloy without hardened steel inserts. What the hell were these engine makers thinking - especially in a marine environment???
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Old 10 March 2009, 11:15   #63
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Quote:
Originally Posted by codprawn View Post
I remember some people laughing at me when I said it wasn't good engineering practice to put steel bolts straight into alloy without hardened steel inserts. What the hell were these engine makers thinking - especially in a marine environment???

Your memory's hazier than mine.... what they said was "cobblers" to your statement that "..Ali was too weak to take a thread and they used hardened steel inserts"...
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Old 10 March 2009, 11:58   #64
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Provided the lower unit bolts come out ok.......
Good call, but realistically the impeller is likely to have been changed more recently than the exhaust plate was removed, making it slightly more likely to come apart! - My old yam the gearbox almost fell off (figureitively, I hasten to add!), and you know what happened "up top".....

Other way of looking at it, if you have proved you can get the head off easily & in a proper workshop, the dirilling accuracy you can get with a bench drill (as opposed to hand drilling while you lean on the transom with a Black & Decker) may make a rebuild feasible again. Have a trawl round t'internet- somewhere out there will be a pic of a stripped block to show you how much margin for error you have. Had mine not turned to shortbread (previous owner(s) not replacing anodes while it lived on a mooring), the helicoils would have worked a treat.
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Old 10 March 2009, 14:05   #65
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Hi Slimtim

Had similar problems with my ageing Yamaha 90 last year but she back running with a new crankshaft and piston, if I can be of any assistance as I see you are also on the iow please pm me (two heads are better than one )

regards
Adrian
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Old 10 March 2009, 16:46   #66
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Originally Posted by slimtim View Post
At the moment I am not holding out much hope of saving the engine so am seriously considering buying another one (90hp)

Come on now Tim, what you actually mean to say is that you WANT a 90HP engine to make the boat go faster, and you've found a half decent excuse to justify it.

The thing is you've only yourself to fool, where as I've had to use this type of excuse on Mrs Nasher so many times when I've wanted to buy something that just can't be justified with anything other than 'I want it'.

I remember for example, all of a sudden the gearbox really was about to give up the ghost in my Volvo. Strangely this problem occured on the same day that I test drove the 280BHP Subaru Legacy GT Estate I ended up buying to replace it

Nasher.
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Old 10 March 2009, 17:11   #67
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Quote:
Originally Posted by slimtim View Post
At the moment I am not holding out much hope of saving the engine so am seriously considering buying another one (90hp)
Just because of a few broken bolts?

If you want an excuse to buy a bigger engine fair enough, but seriously, (at the risk of repating myself from 6 pages ago) take it to a decent machine shop and they will sort it for peanuts (the bolt with the eazi-out in it will need spark erosion or similar so will cost a bit more).

Cheers

Chris
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Old 10 March 2009, 17:16   #68
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you got that about right nasher

You did however mis-quote my smiley face effectively making out that I am sad at the prospect of an extra 20hp and 40+knot top speed whereas the truth is that I am sad at the fact I don't have a job yet and so can't justify said outlay

That may well change in the next 2 days though
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Old 10 March 2009, 17:19   #69
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Come on now Tim, what you actually mean to say is that you WANT a 90HP engine to make the boat go faster, and you've found a half decent excuse to justify it.

The thing is you've only yourself to fool, where as I've had to use this type of excuse on Mrs Nasher so many times when I've wanted to buy something that just can't be justified with anything other than 'I want it'.

I remember for example, all of a sudden the gearbox really was about to give up the ghost in my Volvo. Strangely this problem occured on the same day that I test drove the 280BHP Subaru Legacy GT Estate I ended up buying to replace it

Nasher.
You sound like me.
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Old 10 March 2009, 17:20   #70
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hey chris, I am still going to give it a go and as a result of your advice I have found out about a good machine shop over here that may be able to help if I don't have any success.

I don't know how much a machine shop would charge though, its got to be a few hours work and I don't think it would be worth spending too much on an engine of this age.

cheers,

Tim
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