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Old 03-01-2010, 09:51 PM   #1
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finished Apache's engine and out to play

Finished Apache's engine ,put the power head back on saturday then took it out today for a play,big thanks to rich (driver 510) for all his help
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Old 03-01-2010, 11:21 PM   #2
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looking good dude
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Old 04-01-2010, 07:03 PM   #3
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i love this boat...what rpm did you keep it to enabling "bed in period" or do these motors need it
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Old 04-01-2010, 08:35 PM   #4
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[QUOTE=baj666;173946]i love this boat...
so do i ,all credit to Burty
Going to run her in at 3000 rpm for 10 hours (26 mph ) may take it up to 4000rpm after 5 hours , so only got 9 hours to do now.There is a few little things to sort out, and Im going to change the gear box to a 1.87:1
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Old 05-01-2010, 01:04 AM   #5
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dude 10 hours is way too long
you need to do prob about 4 but make sure u vary the rpm's including switching off and letting cool every 30mins or so!!!
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Old 05-01-2010, 08:27 AM   #6
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Run in time

[QUOTE=lloyde;173964]
Quote:
Originally Posted by baj666 View Post
i love this boat...
so do i ,all credit to Burty
Going to run her in at 3000 rpm for 10 hours (26 mph ) may take it up to 4000rpm after 5 hours , so only got 9 hours to do now.There is a few little things to sort out, and Im going to change the gear box to a 1.87:1
I agree with Burty 10 hrs is way to long, PM Jay Smith and he will give you a break in procedure.

I am sure that on my later race motors I was only putting 2-4hrs on them.
It's only really the bores and piston rings that need bedding in.
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Old 05-01-2010, 09:48 AM   #7
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Is that Hayling Island in the background ?
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Old 05-01-2010, 09:55 AM   #8
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i thought that,so between the pair of us we must be wrong
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Old 05-01-2010, 08:55 PM   #9
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QUOTE DAVE Is that Hayling Island in the background ?

yes it is
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Old 05-01-2010, 10:13 PM   #10
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how come you never binned the auto mix and went for pre-mix??
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Old 05-01-2010, 10:17 PM   #11
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i did its not connected i just left the oil pump on till i can get some blanks.
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Old 05-01-2010, 10:26 PM   #12
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i did its not connected i just left the oil pump on till i can get some blanks.
ahhh
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Old 05-01-2010, 10:36 PM   #13
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gearbox in progress
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Old 06-01-2010, 06:36 AM   #14
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reply from Jay Smith
Re: running in

--------------------------------------------------------------------------------

Quote:
Originally Posted by lloyde
hi Jay can you tell me what revs and hours to run in my engine. 150 pro max i have replaced rings ,big end bearings and lower main bearing many thanks lloyd

First hour I run at idle on the boat with the motor submerged very deep... ( Mix a BLEND oil @ the ratio your are going to run the engine from now on. ) Next take boat off trailor and run up so that the boat gets on plane quickly. After it gets on plane I normally run the first tank at 3500-4000 and every 30 minutes kill the engine and allow to cool a bit. Next fire it up and continue the ride... Next tankful same thing but up the top rpm to 4500 for short bursts then come down to lower rpms.. Progressively let the motor run up 500 rpms higher per tank BUT don't hold it high.

You need to buy a leak down tester and a JSRE TDC indicator gauge so you can check leak down. After say 5 tankfuls I'd take a leak down test . When the motor shows a good seal % like 4 - 5 % I'd then drop the hammer on it BUT don't hold it for long periods of time for a while. Also very important is to allow the steel sleeved motor to completely warm up as well as cool down after a blast...

Cheers,
Jay
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Old 06-01-2010, 07:37 AM   #15
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Lloyde, i'd just reply to Jay telling him how big your tank is as i expect he may well think its smaller than what it is!! Its about 27 gallons if you were wondering
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Old 06-01-2010, 05:14 PM   #16
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Burty i have done that ,and will post Jay's reply . On the invoice its a 120 litre tank which is 31 US gallons thats if its the one you put in.
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Old 06-01-2010, 07:37 PM   #17
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yup thats the one, i forgot uk and us gallons were different
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