10hp engine replacement?

jamie N

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Got a bit of a problem in that my RC8D engine is missing 2-3 teeth from the flywheel ring gear, and the starter didn't engage. I only found out today as I refitted the starter motor after an unrelated fault, but have a feeling that the teeth were broken some time ago. Now, it's going to be virtually impossible to get a new ring gear, and the engine will be sold to 'The' dealer in France for spares I'd think, it leaves a space in the back of the boat.
I'd like some opinions on 8-10hp engines that are either great or rubbish, and why. The boat's not going into the water this year for other reasons, so I'm in a position to make an informed purchase. Refurbed engines of the same type as mine are still available, but I might want a more modern unit; even SWMBO mentioned that this may be a wise thing!
Any help's much appreciated.
 

Topcat47

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Just a thought but back in the day when I was a penniless apprentice, it was common to shift the starter rings of Triumph Heralds and A35/40s around a few radians, so that the starter engaged on undamaged teeth. I even turned one ring back to front on my moggie minor when two segments on the ring had chipped teeth. This won’t work if the ring itself is broken.
 

jamie N

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I contacted the dealer in France, who said he does have new ring gear, and that it's a doddle to fit! Good news, except he's not mentioned a price yet, and being the only source around does give him some clout!
So, remove the engine, remove the gearbox, remove the flywheel and then swap the ring gear, and reassemble!
What could possibly go wrong...
 

JumbleDuck

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If you do decide to swap then from bitter experience I would recommend not under any circumstances fitting a Nanni. I am seriously considering ripping mine out and re-fitting a Yanmar 1GM10.
 

Thistle

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If you do decide to replace, I can recommend the Beta 10. Easy to fit - I did it myself - and virtually no problems in use.
 
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If you do decide to replace, I can recommend the Beta 10. Easy to fit - I did it myself - and virtually no problems in use.

I installed a new Betamarine 25 last year. Much (!!) quieter than the old tired out diesel... technology has indeed improved. My mechanic friends all like the Beta, with a Yanmar an OK second choice. None of them will recommend or willingly touch a wrench to a Volvo, BTW.
Having said that I have a friend that rebuilt his 70's Volvo two cylinder engine and cruised it for over a decade before it wore out again... and then he put in a Beta and returned to cruising.
'Opinions off the internet rendered, while you wait!"
Now On sale.... only $.01 on our weekend special!! :)
 
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