[FONT="]Hello-[/FONT]
[FONT="]I recently acquired a Tohatsu M70A from my father and Im having some issues with it. The thread below seems to describes the same issue I'm having:[/FONT]
http://www.marineengine.com/boat-fo...0-Tohatsu-no-rpms-and-no-power&highlight=m70a
[FONT="]Starts great, Idles great, in neutral open the throttle up (either through the warmup lever or manually at the engine) and she screams RPMs and runs great. Runs fine in reverse. When you shift it into forward it runs fine, but when you get to anything more than 0 degrees, it _sounds_ like its going to try to get going, but then the RPMs suddenly drop. It used to stall at that point, but now the RPMs just drop off. I get going to about 5MPH at wide open throttle. She just doesnt wanna get up and go when under load. [/FONT]
[FONT="]What I've done:[/FONT]
[FONT="]The thread above talked about checking the reed valves, which I have not done yet. Can I take the carbs and reed valves off the motor without having replacement gaskets, and put it back together effectively? Also, Ive seen plenty of posts across the internets stating that the carb rebuild kits are nowhere to be found. Do I really need a rebuild kit, I figure i only need a new float bowl o-ring if I pull that apart to inspect the jets. I can get a new o-ring from the ebays.[/FONT]
[FONT="]Anything else I can be looking into?[/FONT]
[FONT="]I recently acquired a Tohatsu M70A from my father and Im having some issues with it. The thread below seems to describes the same issue I'm having:[/FONT]
http://www.marineengine.com/boat-fo...0-Tohatsu-no-rpms-and-no-power&highlight=m70a
[FONT="]Starts great, Idles great, in neutral open the throttle up (either through the warmup lever or manually at the engine) and she screams RPMs and runs great. Runs fine in reverse. When you shift it into forward it runs fine, but when you get to anything more than 0 degrees, it _sounds_ like its going to try to get going, but then the RPMs suddenly drop. It used to stall at that point, but now the RPMs just drop off. I get going to about 5MPH at wide open throttle. She just doesnt wanna get up and go when under load. [/FONT]
[FONT="]What I've done:[/FONT]
- Sprayed carb cleaner in both carbs and run through twice
- Replaced the fuel line and bulb from tank to motor
- Replaced fuel lines from filter all the way to the carbs
- Replaced fuel pump
- Checked compression: 120PSI on three cranks for both cylinders (150PSI on 5 cranks for both, and that's where it tops out)
- Checked ignition: spark at 10mm gap with inline tester
- Plugs are a little oily but the insulator tip is whiteish/tan, they look good
[FONT="]The thread above talked about checking the reed valves, which I have not done yet. Can I take the carbs and reed valves off the motor without having replacement gaskets, and put it back together effectively? Also, Ive seen plenty of posts across the internets stating that the carb rebuild kits are nowhere to be found. Do I really need a rebuild kit, I figure i only need a new float bowl o-ring if I pull that apart to inspect the jets. I can get a new o-ring from the ebays.[/FONT]
[FONT="]Anything else I can be looking into?[/FONT]
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