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Old 29 March 2009, 13:18   #11
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Originally Posted by Blackroady View Post
when mine was playing up ( later found due to Battery wiring - so not actual engine) I was told you can see if they have had the plugs changed by seeing if they have any 'overspray' on - by all accounts they build the block - put the plugs in & then spray them gray .

If its run higher hours & had the plugs changed you can tell this way ........
Service schedule on a 150 Opti stipulates a spark change on the 10 hour service.
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Old 29 March 2009, 14:18   #12
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Originally Posted by Downhilldai View Post
Service schedule on a 150 Opti stipulates a spark change on the 10 hour service.
Mine was/is 200 - still may not have done... though helps explains why mine was not great when I got it !
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Old 29 March 2009, 15:17   #13
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Originally Posted by Downhilldai View Post
Service schedule on a 150 Opti stipulates a spark change on the 10 hour service.
On a 3 month or 20 hour service, it says "Remove and inspect spark plugs". I never heard of a plug change at 10 hours
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Old 29 March 2009, 15:38   #14
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Yeah your right 20hr/3 month service says Remove and inspect spark plugs. Not replace them.

No such thing as a 10hr service anymore.
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Old 29 March 2009, 15:44   #15
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you can tell if an outboard engine has been looked after etc . If that engine has ONLY done those hours and looked after then it should be in excellent condition . Looking at the paint work and all the bolt heads on the powerhead is a good indication if things have been touched and if the block has been opened up . maybe its had a rebuild and ONLY done those 7 odd hours from there . I would generally look at the paint work ( CORROSION ) BUILD UP , anodes , should have the original plugs in it having only done those hours . I would also put a VIDEO bore scope down the bores and have a look inside the pots and check the bores etc .
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Old 29 March 2009, 15:51   #16
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........ I would also put a VIDEO bore scope down the bores and have a look inside the pots and check the bores etc .

Yep, me too. I never go anywhere without my VIDEO bore scope, I'm shoving it in bores regularly.
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Old 29 March 2009, 16:55   #17
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I'm shoving it in boars regularly.
Fixed for you Mollers
DHD Sounds like a lot of hassle, best shift it on mate
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Old 29 March 2009, 17:15   #18
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Originally Posted by Downhilldai View Post
Service schedule on a 150 Opti stipulates a spark change on the 10 hour service.
Sorry, my mistake. The manual says:
"Replace spark plugs at first 100 hours or first year. After that, inspect spark plugs every 100 hours or once yearly. Replace spark plugs as needed"

This motor should, in any case, have had its plugs replaced by the time it was 1 year old.
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Old 29 March 2009, 18:00   #19
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Quote:
Originally Posted by Downhilldai View Post
Sorry, my mistake. The manual says:
"Replace spark plugs at first 100 hours or first year. After that, inspect spark plugs every 100 hours or once yearly. Replace spark plugs as needed"

This motor should, in any case, have had its plugs replaced by the time it was 1 year old.
Bearing in mind that 6 Merc Optimax spark plugs cost in the region of 115 - 130, I always took them out, cleaned them up and put them right back in again!! The engine never missed a beat and just in case I always had a spare set in the tool box just in case.

Replacing cause the manual says so, particularly when the engine is out of warranty is a bit silly IMHO.

Also if I were you I would be quite worried about such low hours on an old engine. Clearly its a gin palace special and most likely used once or twice a year.

It will have had the balls ragged off it.

Buying low engine hours on an old engine is not the b all and end all.

Also early Optis had a recall for dodgy injectors. Make sure around the injectors there is a blue/purple collar to identify that the recall has been done. If it hasn't its an expensive job to get done and not doing can cause substantial mechanical damage.

I've had problems with the relays as well. Make sure everything runs A OK as they are a bit expensive to replace.

Early trim motors can fail where the cable enters the top of the trim motor with water getting in to the motor so have a good look, particulalry if stored afloat.

Chris
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Old 29 March 2009, 18:05   #20
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..............Clearly its a gin palace special and most likely used once or twice a year.

It will have had the balls ragged off it.
In that case, it might pay to check out the previous keeper with the
VIDEO bore scope.
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