Seized outboard help please

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frderek

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Last night I started my Mariner 5 two-stroke and set off in my tender. While the engione was still relatively cold it stopped (fuel starvation). Having opened the breahter I tried to start it up again, foolishly while still in forward gear. On the second or third pull it seized altogether and the starter rope won't shift it. Any hints for un-jamming with minimum strip-down please? What should I try? tia.
 
How do you know it was fuel starvation?

Remove the plug; then try again. it is possible that the engine has a hydraulic lock due to fuel accumulating in the combustion chamber. This will expel the excess fuel. Do this with the tap off. Vigorous pulling should clear the area above the piston. Make sure the plug is clean and dry before re-fitting. Then try starting as normal.

If this does not work, you'll need to strip down the power head.
 
I guess the OP thinks starvation as the vent was closed. Hydraulic lock from fuel not water unlikely.

Try and separate the systems. Does it go out of gear and if so, does the prop rotate?

Is the recoil starter retracting normally or stuck half in half out? It could be the spring/pawls and gubbins (gloves an idea)

If the recoil is removed and the prop turning in neutral, if you can't hand turn the flywheel its its really seized, oil missing from mix?
 
1. Yes, I forgot to open the breather vent.
2. No, I put it out of gear but the starter just wont 'pull'.
3. Yes, retracting normally.
4. So remove the recoil? Same 40:1 mix as I have been using all year :(

Perhaps I'll take it along to the local outboard specialist if it needs dismantling. Was wondering if if it was just stuck on compression and could be easily moved somehow (without too much spannering).
 
frderek said:
1. Yes, I forgot to open the breather vent.
2. No, I put it out of gear but the starter just wont 'pull'.
3. Yes, retracting normally.
4. So remove the recoil? Same 40:1 mix as I have been using all year :(

Perhaps I'll take it along to the local outboard specialist if it needs dismantling. Was wondering if if it was just stuck on compression and could be easily moved somehow (without too much spannering).
Click to expand...

Can you get to the flywheel with your fingers to try and rotate? If bearings seized there will be NO movement. If piston/rings there will be a tiny amount of turn due to the play in even good bearings. You can remove the plug but I don't think it would help. Easy to try though-
 
Remove the plug, put in gear, turn propeller by hand. Will also show if things move and easier to get a grip at than the flywheel
 
Unless it stopped dead it doesn't sound like it seized; the not being able to start or even turn the engine over may be an unrelated but coincident fault with the in-gear start lock-out, which seems quite common as I've seen several in the last few months.
 
This is a 4 stroke but the in-gear interlock may be similar. It is that vertical rod which operates the white nylon pawl at the top. A bit of wiggling whilst try to pull the starter may free it off, if it is at fault.


starboardinside.jpg
 
penfold said:
Unless it stopped dead it doesn't sound like it seized; the not being able to start or even turn the engine over may be an unrelated but coincident fault with the in-gear start lock-out, which seems quite common as I've seen several in the last few months.
Click to expand...

My first thought too. But turning the prop/flywheel should eliminate it, or not.
 
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