dbkimbro68
Cadet
- Joined
- May 23, 2016
- Messages
- 7
I just picked up a '06/'07 70hp Yamaha motor that was originally a pontoon boat engine and installed it on my FULLY Restored '83 AlumaCraft Bandit. Installed a New 703 Remote control unit, NEW,o.e.m. waterpump impeller, New,NGK sparkplugs, cleaned the carbs(Sat up 2 seasons), have the tach/trim gauge with only oil warning indicators, volt gauge, and clock. I ran a pre run/SeaFoam de-carbon/cleaning test with foot in a constant full water tank to be sure that the cooling system was working correctly, and not knowing about the oiling system, I ran it on pre-mix. The oil tank was half full of red Yamaha oil,and I marked the tank at oil level to see if the level dropped after running(oiler works).. Motor ran GREAT for 2hrs in tank from 30min at idle,30min at 1800rpm(fwd),30min at 2800rpm,30 min at 5000rpm then back to idle for the last 30min... Motor performed PERFECTLY with no alarms. I removed and cleaned the oil level switch/strainer,filled the tank to 1/2" from top of the tank, filled up the 12gl fuel cell with non-ethanol 93 octane and for peace of mind,added 16oz of Quicksilver 2cycle oil to fuel along with another16oz bottle of SeaFoam. Headed out to the lake,ran the boat for several hours(5-6) to see how it performed on a 17ft aluminum bass boat at no wake speed, trolling speed,all the way up to a 5900rpm max rev speed... Motor ran GREAT,,, of a top speed of 37mph and used only 6gl of fuel and about 1.5in drop of the oil level in on motor tank... No problems,no alarms.
2 days later I filled the fuel tank and set out for a day of fishing on the lake. Motor cranked fine,ran fine for about half a mile at 5900rpm and then BAM!! the alarm goes off,motor boggs to 2100rpm and ran like $H!T.. Had a perfect flow of warm water coming out of the "**** tube", could hold my hand on top of the cyl head(2-3min), oil level full,arrow on tach gauge pointing to green full indicator... Shut motor off, trolling motored about .25 mile to a sandbar island and tied up. Sat there waiting,going over everything I could think of that may have been causing the alarm and found NOTHING... After an hour of waiting,checking every 5minutes via key turn for the alarm to go off, I re-cranked the motor(no alarm), checked the water output flow and temp(perfect) and started back to the truck. Motor ran GREAT again at 5500rpm back to the dock. Tied the boat to the dock and left it at idle while backing the trailer in and had my friend at the boat waiting for an alarm. Motor was at idle maybe 10-15min,and no alarms. As I started to load the boat onto the trailer, the alarm triggered again as soon as I revved up to 4250rpm for the final "push" onto the trailer and I shut it down.
When I got it home,I put the foot back into the water tank,cranked the motor and let it run.. Water temp and flow from the "**** tube" was perfect and laserd at 165?f..but after about10min at idle,the alarm goes off again. I again went to checking things that relate to triggering an alarm, and found NOTHING that should be causing this.. After sitting for 24hrs, I took it back out, ran it for a bit at 4500rpm and it did ok,then as I,went to full(5900)throttle, the boat planed out,went 200yrs and acted like it was starving for fuel,then picked back up,ran a second then acted as if it was loading up,then starving again. I came back to idle,pulled the cooling and revved it at the carbs a couple of times... Revved up good but was a little oil rich,but it,seemed understandable since I have a low mix pre-mix fuel along with a working oiler system.
I put the cowling back on,but it in fwd and started back up to speed... Ran great,no starving/loading, no alarms, and did fine.....until I got to exactly 5600rpm and the alarm goes off again.
I am VERY well versed in automotive mechanics and repair, but have very little experience with2 stroke outboards... I have been through every single thing that I can think of,every troubleshoot that Yamaha has in the owners/service manual that pertains to the alarm going off,and I am at a COMPLETE loss..
Has anyone else had anything close to, or these symptoms happen to you? and if so,what was the final determination of the cause and what was the repair???
Please help in any way possible... I don't have anymore hair to pull out of my shaved head!! ,LOL!!
2 days later I filled the fuel tank and set out for a day of fishing on the lake. Motor cranked fine,ran fine for about half a mile at 5900rpm and then BAM!! the alarm goes off,motor boggs to 2100rpm and ran like $H!T.. Had a perfect flow of warm water coming out of the "**** tube", could hold my hand on top of the cyl head(2-3min), oil level full,arrow on tach gauge pointing to green full indicator... Shut motor off, trolling motored about .25 mile to a sandbar island and tied up. Sat there waiting,going over everything I could think of that may have been causing the alarm and found NOTHING... After an hour of waiting,checking every 5minutes via key turn for the alarm to go off, I re-cranked the motor(no alarm), checked the water output flow and temp(perfect) and started back to the truck. Motor ran GREAT again at 5500rpm back to the dock. Tied the boat to the dock and left it at idle while backing the trailer in and had my friend at the boat waiting for an alarm. Motor was at idle maybe 10-15min,and no alarms. As I started to load the boat onto the trailer, the alarm triggered again as soon as I revved up to 4250rpm for the final "push" onto the trailer and I shut it down.
When I got it home,I put the foot back into the water tank,cranked the motor and let it run.. Water temp and flow from the "**** tube" was perfect and laserd at 165?f..but after about10min at idle,the alarm goes off again. I again went to checking things that relate to triggering an alarm, and found NOTHING that should be causing this.. After sitting for 24hrs, I took it back out, ran it for a bit at 4500rpm and it did ok,then as I,went to full(5900)throttle, the boat planed out,went 200yrs and acted like it was starving for fuel,then picked back up,ran a second then acted as if it was loading up,then starving again. I came back to idle,pulled the cooling and revved it at the carbs a couple of times... Revved up good but was a little oil rich,but it,seemed understandable since I have a low mix pre-mix fuel along with a working oiler system.
I put the cowling back on,but it in fwd and started back up to speed... Ran great,no starving/loading, no alarms, and did fine.....until I got to exactly 5600rpm and the alarm goes off again.
I am VERY well versed in automotive mechanics and repair, but have very little experience with2 stroke outboards... I have been through every single thing that I can think of,every troubleshoot that Yamaha has in the owners/service manual that pertains to the alarm going off,and I am at a COMPLETE loss..
Has anyone else had anything close to, or these symptoms happen to you? and if so,what was the final determination of the cause and what was the repair???
Please help in any way possible... I don't have anymore hair to pull out of my shaved head!! ,LOL!!