guidance from a seasoned pro please

Chris Miele

Cadet
Joined
Sep 3, 2004
Messages
19
I posted earlier about my 93 yam 70tlrr. <br /><br />Arco trim motor ($195) and yamaha service manual ($75!! shipped) arrive tomorrow. ordered 3 carb kits and water pump repair kit ($95) from boats.net (are they REALLY oem parts?) Kits probably here next week. <br /><br />So, this weekend, the trim motor goes on, carbs come off, and I am crossing my fingers.<br /><br />I know that once I get my eager paws on that manual, that I (hopefully) will have more instruction than I know what to do with. But in the meantime, any pointers? I had the motor running, but fuel was pouring out of all 3 carbs from a hole in the top that I assume is a vent of some sort. No biggie I'm sure, but I wonder...<br /><br />I have been reading post for 70 Yam, and Yam carb rebuilds ALL WEEK. This site is priceless. What I wouldnt give to have someone like rodbolt or any of you other guru's watching over me this weekend. I am going from a 12 foot zodiac w/ a 15hp merc (learned a lot there) to a scout 152 console. Hey I'm a 28 year old single social worker I do what I can. So anyhow, oil injection has been capped off, I'm sure I need to test it. Carb clean/kit, new trim motor, h20 pump rebuid--all these are a given. Should I spring for a fuel pump? New lines? Any ignition parts/coils/plug wires etc? I would be greatly appreciative of any other "Get her tuned and safe and maintained" sort of advice.<br /><br />thanks, chris
 

rodbolt

Supreme Mariner
Joined
Sep 1, 2003
Messages
20,066
Re: guidance from a seasoned pro please

fuel pump rebuild or replace is a good thing as is a testing or replacing of the thermostat. dont see many coil failures but new plugs are cheap and always ok.<br /> dont have much fuel line problems but if its sat then a swabbing out with a small lint free rag soaked in carb cleaner and pulled through with a string will help get any varnish off the ID of the hoses between the outlet side of the engine filter and the carb inlet nipples. while your in the filter clean it and make sure both orings are in place. some of the filters had a small seal at the element and all of them had an oring on the plastic body.<br /> while your buying pick up the pump and gearcase adapter and a qt of gear lube and a pair of drain and fill gaskets and replace the gear lube.
 

Chris Miele

Cadet
Joined
Sep 3, 2004
Messages
19
Re: guidance from a seasoned pro please

thanks rodbolt. kind of disappointed in my new yammy manual. the technicals are right on, but the narratives are weak. debating sending it back, but figure i will keep it and get a clymer as well. <br /><br />pump and gearcase adapter? pump is self explanatory-whats the adapter for?
 

rodbolt

Supreme Mariner
Joined
Sep 1, 2003
Messages
20,066
Re: guidance from a seasoned pro please

unless you buy the high dollar yamaha pump you will need the adapter from the standard 3/8thsx16 pump threads to the yamaha 8mmx1.0mm drain and fill thread size.<br /> and your right about the manual :) just think. the nissan,tohatsu suzuki and volvo manuals of the same period were worse.<br /> Trust me, I worked for all of them in the early 90's
 

Chris Miele

Cadet
Joined
Sep 3, 2004
Messages
19
Re: guidance from a seasoned pro please

OK so the motor goes up and down now. Lemme tell ya that thing was getting heavy. I ended up taking it off of the transom so that I could get to the bolts for the resevoir and PTT motor. After I ironed out the leaks, it was golden. <br /><br />Carbs are off and soaking. I removed all gaskets/washers so I figured it was OK to soak them for a while. Plus I bought an air tank because i dont have an air compressor. A needle for basketballs seems to put out a nice stream of air, hopefully strong enough to clear the passageways, so. We'll see. <br /><br />Also ordered a fuel pump. <br /><br />My quesion is, EVERY electrical joint on the motor is corroded. Two wiring connectors actually broke. Should I attempt to clean each one?, or just replace them? If I should clean them, what is the best method? If they should be replaced, should I use marine grade hardware? <br /><br />Second question, the whole back half of the powerhead is flaked/corroded with white dust which I assume is salt. While I have the motor bare, I want to refinish it. Any pointers on materials? <br /><br />Once I repaint the finish, the electricals cleaned and the carbs back on, I will move on to the oil injecton that has been disconnected for quite some time. <br /><br />Thanks again in advance for your guidance..
 

Ray Neudecker

Lieutenant Commander
Joined
May 25, 2004
Messages
1,656
Re: guidance from a seasoned pro please

Be careful to remove the paint where electrial components mount since many use that as ground.
 
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