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Old 25 June 2014, 13:35   #1
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Starting problem Mariner 25hp 2str.

Hi All,
Just back from a fantastic 10 days camping and sibbing at Shell Island (Wales) but I have a strange starting problem after the engine has been run and tilted for more than 15 minutes (just a estimate as it will start ok if it has only tilted for a couple of minutes) without running the carb dry.

Basically its a real P.I.T.A. to get re-started, no fun when trying to hold the sib in the surf, it always starts first pull if it has been run dry and re primed but I do not like to risk running it dry when trying to beach it without being swamped.

Any ideas/tips? or is it something that I will have to live with, or try to guesstimate disconnecting the fuel line on the run in and hope for the best.
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Old 28 June 2014, 09:34   #2
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Carb strip. Sounds like it is flooding. Possible could do with a new float valve.
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Old 28 June 2014, 17:20   #3
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Originally Posted by diver12 View Post
Carb strip. Sounds like it is flooding. Possible could do with a new float valve.
Thanks for the reply, I will have a look at the float valve but it is only hard to re-start after it has been tilted for 15mins or so without running it dry, every other time it starts 1st or 2nd pull.

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Old 28 June 2014, 20:27   #4
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Originally Posted by bartiny View Post
Thanks for the reply, I will have a look at the float valve but it is only hard to re-start after it has been tilted for 15mins or so without running it dry, every other time it starts 1st or 2nd pull.

Hi All

Have you tried jubilee clips on fuel line and how old is the priming bulb, you may have loose clip, how old is the engine
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Old 29 June 2014, 15:31   #5
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Hi All

Have you tried jubilee clips on fuel line and how old is the priming bulb, you may have loose clip, how old is the engine
The fuel supply side is all ok, primer bulb good condition, engine is mid 80s and in very good condition.

Looks like I will just have to live with it, just thought that someone might have had the same issue and had a specific proceedure to re-start.

Thanks for the reply
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Old 02 July 2014, 12:37   #6
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Originally Posted by bartiny View Post
The fuel supply side is all ok, primer bulb good condition, engine is mid 80s and in very good condition.

Looks like I will just have to live with it, just thought that someone might have had the same issue and had a specific proceedure to re-start.

Thanks for the reply
Hi Have you tried carburetor fuel line cleaner mixed with fuel Redex does one 60ml in 11ltr fuel with your two stroke, try a couple of times also cleans pistons and rings.
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Old 02 July 2014, 15:01   #7
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Have you tried pumping the primer after its been tilted a while?
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Old 02 July 2014, 15:02   #8
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Originally Posted by diver12 View Post
Carb strip. Sounds like it is flooding. Possible could do with a new float valve.
IMHO... This is it ^^^
Fuel leaking in due to sticky float valve.

There's nothing procedurally to do except fix it.
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Old 01 October 2014, 05:22   #9
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Just an update on this issue;

After a recent couple of weeks at Redcliffe farm Nr Pool I had a few opportunities to try different start procedures (after it had been run and tilted), and it turns out that I have to pull the choke as if I were starting it from cold for it to start within 2 pulls.

So procedure it was.

Thanks for all the suggestions.

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Old 01 October 2014, 06:59   #10
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Missed this thread first time round but I've experienced similar with a mid 80s Mariner 20 on a grp boat we had.

From cold it was a reliable second/third pull start and hot it was a first pull start... but leave it more than 10/15 mins and it would need half choke to start.

Because you are usually in the situation of needing a reliable start (if only to impress onlookers) it was human nature to be wary of flooding the engine by using choke after such a short time stopped so many times I'd pull it over loads of times with no choke.

It was well serviced / set up and otherwise ran really well so once I realised the procedure I needed after short stops I didn't investigate further.
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