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Old 14 September 2006, 17:29   #1
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I know technically an engine question but...

I have just bought Biggles Avon Searider 4m...

Now the dilemma engine.. go new or secondhand.. I know probably like me many of you will have had the same dilemma do I spend my hard earned money on something new and shiny and loose lots of money when I turn the key.. or do I buy something older and hope for the best or as I have found over the years I loose a day of boating as something goes wrong. These are engines I always get serviced when i buy them and use properly. So i am looking for a new engine I think... Cos the old Mariner 25 I used to ahve that I stripped and rebuilt had no problems but is too small now..

All 2 strokes...
So who likes Tohatsu.. A brand new 2006 50HP ELOPT only 2700...
A 50 Yamaha 2006 ELOPT only 3600
or a Mariner 50 ELOPT only 3400...

I want the yam but is 900 more than tohatsu, all with 2 year warranty...
So who has a Tohatsu and rates them and who thinks they are cheap rubbash.

I have an old bomb proof 40 mariner.. manual start, old school chug chug, but it is only a short shaft.. I need a long.. other wise could keep the old thing forever!! Can you lengthen the shaft leg?

Alex
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Old 14 September 2006, 17:37   #2
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Changing the leg would essentially mean buying an engine with a blown powerhead and swapping the whole leg, clamp etc. About a 2 hour job if the powerhead comes off without siezed bolts.

Those mariners are cheap as chips when the powerheads are trash though-I sold one with a cooked powerhead for 120 last year and they regularly appear on ebay.

The gearbox spares from the short shaft would fit though (apart from the driveshaft) and the whole exercise would leave you with a lot of free spares-and the advantage that you know the engine.
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Old 14 September 2006, 17:37   #3
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Quote:
Originally Posted by badbaws
..I have an old bomb proof 40 mariner.. manual start, old school chug chug, but it is only a short shaft.. I need a long.. other wise could keep the old thing forever!! Can you lengthen the shaft leg?
I've seen it done on a 40 Mariner, the Yamaha type, using a spacer casting. I'm not sure if it was a genuine kit or whether they were made to suit.
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Old 14 September 2006, 17:43   #4
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Quote:
Originally Posted by jwalker
I've seen it done on 40 Mariner, the Yamaha type, using a spacer casting. I'm not sure if it was a genuine kit or whether they were made to suit.
Was it ex-RNLI by any chance? Apparently they use a shaft halfway between short and long on some engines.

It'd probably mean a driveshaft spacer too.
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Old 14 September 2006, 17:44   #5
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Maybe...

Or shoudl I just get a nice shiny new engine!!! and sell the old one!!
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Old 14 September 2006, 17:46   #6
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Non RNLI...

Not an ex RNLI.. this was just a short shaft sorry.. standard shaft. I think it is a late 80's engine.. probably used and abused by others over the years.. but it still chugs on all day.. not like those nice Optimax engines.. that don't like saltwater..rain water or boats!!
You don't need a laptop with these old engines.. just a hammer and a new set of plugs to deal with the low speed carbon on the plugs..
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Old 14 September 2006, 17:51   #7
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Quote:
Originally Posted by badbaws
Or shoudl I just get a nice shiny new engine!!! and sell the old one!!
It's definitely the cheaper option-there's 1000's of ex RNLI 40's out there. Depends if you want to do it yourself or not and save on the labour charge. If not, I'd personally buy a new engine.


The powerhead swap sounds like a lot of hassle but it's not really as long as the powerhead bolts are OK and the donor engine is OK bar the powerhead. I've done a powerhead swap on pullstart 50 mercs using 1 good engine, one siezed engine and a spare powerhead in 8 hours-and had 2 running engines afterwards.
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Old 14 September 2006, 17:59   #8
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25Mariner

I took the powerhead out of my old mariner 25 and managed to get it back in agian and the engine was fine.. but I guess I like powertrim and electric start now.. the wife can just about start a 10hp.. the 40.. no chance..

So yes I can justify buying a new engine as otherwise my wife won't be able to start it!! I am only thinking of her..
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Old 14 September 2006, 18:33   #9
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Quote:
Originally Posted by badbaws

All 2 strokes...
So who likes Tohatsu.. A brand new 2006 50HP ELOPT only 2700...
A 50 Yamaha 2006 ELOPT only 3600
or a Mariner 50 ELOPT only 3400...

I want the yam but is 900 more than tohatsu, all with 2 year warranty...
So who has a Tohatsu and rates them and who thinks they are cheap rubbash.



Alex
Everyone I know with a tohatsu swears by them - reliable and loads of power - also a great price. They are used a hell of a lot in zapcat racing.

Check the weights of the engines - I think the Mariner is a 4 cylinder? so will be a lot heavier. Also which Tohatsu are you after - the new TLDi is very efficient but heavier than the standard 2 stroke and no doubt more expensive!!!
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Old 14 September 2006, 18:44   #10
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This Tohatsu...

Model no. 50 EPTO s/l 3c ----------- Tohatsu 50HP ------------- 2695
Starter: Electric .---- Control: Remote----- Stroke: 2 Stroke -----. Tilt: Power trim ------Weight 72kg ----Shaft lenght 15" 20" or 25"


Oil injected engine

All the 50's seem to be 3 cyl..
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