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Old 18 September 2008, 20:45   #41
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Town: Lima-Peru
Boat name: Nautile
Make: Sea Rider Boats
Length: 4m +
Engine: Tohatsu 18 /30 HP
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Originally Posted by ian parkes View Post
Yes I can't wait to get it run in . The motor starts missing if i run slow for a while , I hope its just the plugs getting a bit oiled , a quick burst of wot cures it , but thats not always possible if its a bit lumpy so i can't go play for another 4 hrs
sods law on the gas tilt , nothing ever comes together simply with boats does it
Yes my motor came from extreme marine , the last one
Hola Ian

You finally made it, muchos congrats, cute small capt, nice rib & engine configuration, some issues:

1-Don't think that by going 25:1 to 50:1 oil after first 10 hours will improve full wot top end speed inmediately, will take a few more hours for the engine to settle it's piston/rings/cylinders, the only difference is that now you can wot at any lenght of time. Clean your spark plugs before changing to 50:1 oil mix, regap if neccesarry to 1.00 mm or (0.40") shim tight.

2-Most Tohatsu engines that have in use, or have installed, comes with the swivel bracket adjusted towards light load, this factory adjustment can tired your arm on long distances, choppy water fast rides, or lose boat control when full wotting under un experienced persons in command. Maybe should adjust your bracket load bolt slightly 5 CW to increase a bit the load, specially if your daughter will be at the comandd of the Toh 50 at faster speeds once break in engine period is over.

3-Tohatsu's works perfect trimed on the second hole from transom, or at a position that matches 90, boat bottom & perpendicular engine leg configuration. Place gas tank & passengers towards bow to have better rib balance and plane faster. Welcome on board!

Happy Ribbing
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Old 19 September 2008, 12:16   #42
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Ian,
I see by the pictures posted that your towing with a VW transporter/Carvelle? What ebgine does it have and how do you find it for towing?
Cheers mate.
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Old 19 September 2008, 13:01   #43
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Country: UK - England
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Quote:
Originally Posted by ian parkes View Post
Yes I can't wait to get it run in . The motor starts missing if i run slow for a while , I hope its just the plugs getting a bit oiled , a quick burst of wot cures it , but thats not always possible if its a bit lumpy so i can't go play for another 4 hrs
sods law on the gas tilt , nothing ever comes together simply with boats does it
Yes my motor came from extreme marine , the last one
When it runs lumpy-is it at idle speed?
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Old 19 September 2008, 16:54   #44
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When it runs lumpy-is it at idle speed?
After about an hour of cruising especially if I have gone slow off the plane for a few minutes it then stats to miss when I cruise again between 4 and 5 k . A quick blast of WOT seems to cure it for a while . I have been cleaning the plugs after each trip .
I hope its just extra oil fouling the plugs . i have chacked the fuel filter and drained the carbs just incase but all was clean .
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Old 19 September 2008, 18:41   #45
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Ian,
I see by the pictures posted that your towing with a VW transporter/Carvelle? What ebgine does it have and how do you find it for towing?
Cheers mate.
The VW transporter is a 130 5cyl 2.5 . they are rated to tow 2500 kg
It tows very well with lots of pulling power , one of the best towing vehicles i have owned , not that i have very much to tow now. probaly not the greatest thing on a slippery slipway unless you get the 4wd version
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Old 19 September 2008, 19:10   #46
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Oh well, I better really rag the backside out of mine then. I've only got the 1.9TD, plus it's a 9 seater plus it's the LWB. If it comes to a hill and I'm towing I'll have to start throwing bodies out to push
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Old 20 September 2008, 04:56   #47
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Quote:
Originally Posted by ian parkes View Post
After about an hour of cruising especially if I have gone slow off the plane for a few minutes it then stats to miss when I cruise again between 4 and 5 k . A quick blast of WOT seems to cure it for a while . I have been cleaning the plugs after each trip .
I hope its just extra oil fouling the plugs . i have chacked the fuel filter and drained the carbs just incase but all was clean .
I had a similar problem with mine-I found that the carb mixtures were very rich on the middle and bottom carb-ideally the mixture screws chould be 1 1/2 to 2 1/2 turns out- on mine, they were top-2 3/4 ,middle-3 1/2, bottom 4 !!!turns out. This actually caused me to loose the bottom plug because it totally flooded it after doing a couple of fast start/stops in a row. Ive got it running nicely now with the screws at top-2,middle2 1/4, bottom 2 1/2. If i went any leaner on the bottom one it wouldnt idle smoothly. Another thing i noticed on mine was that the wires to the flywheel were stopping it from getting full ign advance because they where trapped inside the black box-its an easy check to do, just open the throttle fully (with engine not running) and check that the slidy bit with the timing marks on it under the flywheel moves and stops against the casting near the carbs-if it doesnt hit it then the wires are probably restricting it.
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Old 20 September 2008, 16:56   #48
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Originally Posted by Easyrider View Post
I had a similar problem with mine-I found that the carb mixtures were very rich on the middle and bottom carb-ideally the mixture screws chould be 1 1/2 to 2 1/2 turns out- on mine, they were top-2 3/4 ,middle-3 1/2, bottom 4 !!!turns out. This actually caused me to loose the bottom plug because it totally flooded it after doing a couple of fast start/stops in a row. Ive got it running nicely now with the screws at top-2,middle2 1/4, bottom 2 1/2. If i went any leaner on the bottom one it wouldnt idle smoothly. Another thing i noticed on mine was that the wires to the flywheel were stopping it from getting full ign advance because they where trapped inside the black box-its an easy check to do, just open the throttle fully (with engine not running) and check that the slidy bit with the timing marks on it under the flywheel moves and stops against the casting near the carbs-if it doesnt hit it then the wires are probably restricting it.
Thanks for that info , very good to know , especially the timing .
Any idea why your air screws needed setting different on each carb ? Haven't checked mine extreme marine said they set them up and run them etc before delivery so I trusted they had .

I had a strange issue today . We left the beach heavily loaded with five of us and a load of gear . I we had to launch in the surf so I warmed the motor up well while holding the boat head to waves then jumped in quick and went . The boats just lacked power and wouldn't rev past 4300 k for about a mile . I then stopped and let it tick over while we sorted something out and it went like normal afterwards . All I can think was that I didn't queeze the primer bulb when I started it to come home . It had sat on the beach all day with the motor fully tilted . Maybe i have the ignition advance issue too
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Old 20 September 2008, 17:06   #49
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Was you on 1/2 choke or no choke at all???
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Old 20 September 2008, 17:14   #50
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Re the carb settings- the bottom carb has a different size jet to the other 2 for some reason. The thundercat racers say, to set your carbs up, set them 1 3/4 turns out then adjust them accordingly until it idles ok then check your plug colour after a good run.
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