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Stuart Turner R3m timing

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Chris Rowe
Posted on Friday, May 14, 2004 - 03:30 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Can anyone tell me the distance in inches or mm. btdc for timing a Stuart Turner r3m
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Tim Mulvey
Posted on Friday, May 14, 2004 - 06:12 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

1.5 inches BTDC per the Manual. There should be an "M" mark but may have filled with paint.
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Ray Middlewick
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Posted on Wednesday, April 13, 2005 - 12:29 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I have rebuilt one of these engines and set the timing as above however i checked it with a strobe and it was advanced. I reset it at 15 deg with the strobe. The engine ran rough. I then advanced it to 30 deg with the strobe and the engine runs OK. Is this OK?
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peterogborne
Senior Member
Username: peterogborne

Post Number: 243
Registered: 09-2002
Posted on Thursday, April 14, 2005 - 01:26 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

throe yoor strob a way.....old sailors do not use them .Stik to the makers timing mark.
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Ray Middlewick
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Posted on Wednesday, June 01, 2005 - 02:46 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Thanks for advice. Another problem!After bench running, the engine was fitted to the boat and engine trials were very good how ever the problem that we now have is that the water runs through the engine ok when it is cold, but as it gets warm the water flow is not consistent(good flow and then a dribble) and the engine gets to hot. Any thoughts?
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peterogborne
Senior Member
Username: peterogborne

Post Number: 253
Registered: 09-2002
Posted on Thursday, June 02, 2005 - 01:05 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Ray ...with out seeing your piping layout my first inclination as to your problem is an air lock . Are you sending the hot water out the side of the boat or does it go into the exhuast system?
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Ray Middlewick
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Posted on Thursday, June 02, 2005 - 02:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hi Peter
The water goes straight to the stern, but is slightly under water when under way.The length of pipe is approx 6ft and 15mm dia copper tube.My first thoughts were a blockage or air lock but as i have said the engine runs with a good flow for at 5-8 mins before it becomes inconsistent. The strainer is clear.I am going to put a piece of hose on the outlet and go straight over the side to see if this solves the problem.
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peterogborne
Senior Member
Username: peterogborne

Post Number: 254
Registered: 09-2002
Posted on Friday, June 03, 2005 - 06:59 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Ray....I think from the sound of it you may have a cylinder head gasket problem. It could be that gas is leaking through the gasket into the water jacket after some running time you would have build up of exhaust gas in the water jacket space and as result your water flow would suffer. Check your cylinder head and that it seals properly.Lets know how you go ...feed back is important.
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Ray Middlewick
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Posted on Monday, June 13, 2005 - 02:08 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hi Peter
I hope that is not the case!!! I have been also informed that the non return valve on the water pump could also be letting by as when the engined is running at quarter to half speed the water flow returns to normal. I have a spare pump which I am reconditioning at the moment. The plan is to give the boat a run out this Saturday. I will report any findings

Regards

Ray
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Ray Middlewick
Visitor
Posted on Wednesday, June 29, 2005 - 04:45 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Well the water problem has been sorted. the pump valves were badly worn,the water pipe from the engine to overboard was partially blocked and the cooling water block on top of the engine was also partially blocked. Engine ran for 2 hrs on load no problems.On the way home the HT lead broke(silicone?) managed to re crimp it on and engine started OK. New lead fitted (copper)but, engine starts fine then after 3-4 mins cuts out wont start for 10mins or more. Checked spark /petrol all ok.Any suggestions? After the 2hr run the crankcase was drained approx 3tbsps petrol oil mix removed is this OK? Is the ratio 40/1 or 48/1 on this engine? At the moment running at 40/1
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peterogborne
Senior Member
Username: peterogborne

Post Number: 255
Registered: 09-2002
Posted on Wednesday, June 29, 2005 - 06:28 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Ray ,your fuel ratio should be ok . Seems your water system need a good clean out and you are now running cool.
The problem re cutting out sounds like fuel starvation and the first place i would look at is the small breather hole in the fuel tank cap.
If this does not cure it then check the layout of your fuel ines and see that there are no possibilities of air pockets being created.
The amount of oil in your crank case is ok after running for some time you get a residual amount in the sump . If it prevents an easy start ,ie plugs fouling fit a drain cock this also helps if you flood the carb.
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Graham Wilson
Visitor
Posted on Friday, July 22, 2005 - 02:19 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hi Peter, this turned out not to be fuel at all but electrics. The connection of the spark plug lead to the magneto seemed nice and tight but on removing the mag cover the connector inside was loose probably because someone has fiddled with it before maybe, anyway the contact was not good as you can imagine, so with a good tightening the problem and all the heart ache was solved. as simple as that would you believe. Can't thank you enough for your help, at least the petrol side has been thoroughly investigated now, and we know it inside out.Since fixing have had about three hours problem free running. No doubt will probably be speaking to you again soon. Thanks again.
Gra...(mate of Ray's)
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peterogborne
Senior Member
Username: peterogborne

Post Number: 257
Registered: 09-2002
Posted on Friday, July 22, 2005 - 06:39 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Graham.......glad to hear of your success,it is good to get feedback on problems as it also helps others.
As a matter of interest ,I have a wooden boat ,just finished a ''boatshed'' for it so that i can now get on with restoring it.It came with a P55 ,8HP. As i have a selection of S/T engines ,ie P55,P5 and a RM3 to put back in the hull i was wondering what sort of performance you got with your RM3?
I like this little engine and mine is a very reliable unit .....maybe the HP will be lacking for a 16 ft hull! Interested to hear your experience.
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Graham
Visitor
Posted on Saturday, July 30, 2005 - 05:16 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hi Peter My engine is in a 11' Latham, I use it in the river running down to Poole Harbour and with 4 up I recon on 4 knots, at half throttle, put her in the bay last week and with 2 up and with a good tide made a good 6 knots, again on half throttle. I do not get much more speed out of her with my 2.5hp outboard so I guess much is on the design of the hull with these things. i hope this is of some help. graham
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gramel@btinternet.com
Visitor
Posted on Monday, September 26, 2005 - 12:51 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hi Peter, you will be pleased to hear that I have now had about 20 hours of running up and down the river and out into Poole Harbour with my Stuart turner with no mishaps, (I hope I'm not tempting fate with this statement) Anyway thanks for all your input and hoping you are having success with your project. many regards Graham...
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Posted on Monday, March 06, 2006 - 05:43 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

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