Tohatsu Outboard Break-In Chart

The following charts show the standard "break-in" periods for Tohatsu Outboards.

2-Stroke (carbureted) · 4-Stroke · TLDI (2-Stroke)

2-Stroke (carbureted)

All carbureted 2-strokes must run with "double-oil" during the break-in period (Does not apply to TLDI models. Please see the TLDI break-in chart listed below). Normally your Tohatsu outboard uses a 50:1 oil/fuel mixture (1 pint of oil for every 6 gallons of gas). During the break-in period you should use a 25:1 oil/fuel mixture (2 pints of oil for every 6 gallons of gas). See our oil/fuel chart for more info on the 50:1/25:1 ratios.

Tohatsu 2-stroke outboards use TCW3 oil which is specially formulated for 2-stroke outboards. Do not use automotive motor oil or any other type of oil in your Tohatsu 2-stroke outboard. We do not recommend mixing different brands of oil (or even different kinds of oil of the same brand). The mixing of different brands of oil may cause gelling which may cause blockage of the filter screens. This could lead to serious engine damage due to the lack of lubrication.

As a result of running your outboard with a double-oil mixture, it is normal for your engine to emit more exhaust smoke than normal. You may also notice oil coming from the around the prop and/or from the exhaust relief port hole (located near the top of the lower unit) during this period. This is completely normal and you should see this excess oil eliminated once you finish your break-in period and resume the normal 50:1 oil/fuel mixture.

After your break-in period has been completed, you should change your lower unit gear case oil.

2.5-3.5 hp (2-Str) 1-10 min 10 min-3 hrs 3-5 hrs After 5 hrs
Throttle Position Idle Less than 1/2 throttle Less than 3/4 throttle Full throttle available
Speed Approx. 500-3500 rpm Approx. 4000 rpm
5 hp (2-Str) 1-10 min 10 min-2 hrs 2-3 hrs 3-10 hrs After 10 hrs
Throttle Position Idle Less than 1/2 throttle Less than 3/4 throttle 3/4 throttle Full throttle available
Speed Approx. 3000 rpm Full throttle run allowed for 1 min every 10 min Approx. 4000 rpm. Full throttle run allowed for 2 min every 10 min
8-9.8 hp (2-Str) 1-10 min 10 min-2 hrs 2-3 hrs 3-10 hrs After 10 hrs
Throttle Position Idle Less than 1/2 throttle Less than 3/4 throttle 3/4 throttle Full throttle available
Speed Approx. 3000 rpm Full throttle run allowed for 1 min every 10 min Approx. 4000 rpm. Full throttle run allowed for 2 min every 10 min
15-18 hp (2-Str) 1-10 min 10 min-2 hrs 2-3 hrs 3-10 hrs After 10 hrs
Throttle Position Idle Less than 1/2 throttle Less than 3/4 throttle 3/4 throttle Full throttle available
Speed Approx. 3000 rpm Full throttle run allowed for 1 min every 10 min Approx. 4000 rpm. Full throttle run allowed for 2 min every 10 min
25-30 hp (2-Str) 1-10 min 10 min-2 hrs 2-3 hrs 3-10 hrs After 10 hrs
Throttle Position Idle Less than 1/2 throttle Less than 3/4 throttle 3/4 throttle Full throttle available
Speed Approx. 3000 rpm Full throttle run allowed for 1 min every 10 min Approx. 4000 rpm. Full throttle run allowed for 2 min every 10 min
40-50 hp  (2-Str/3 cyl) 1-10 min 10 min-2 hrs 2-3 hrs 3-10 hrs After 10 hrs
Throttle Position Idle Less than 1/2 throttle Less than 3/4 throttle 3/4 throttle Full throttle available
Speed Approx. 3000 rpm Full throttle run allowed for 1 min every 10 min Approx. 4000 rpm. Full throttle run allowed for 2 min every 10 min
Note: If your Tohatsu 40/50 hp 3-cylinder outboard is equipped with "oil injection" (automixing of oil/fuel) you should prepare your fuel/oil ratio at 50:1 in the gas tank in addition to using the oil injection feature during the break-in period.
70-90 hp  (2-Str/3 cyl) 1-10 min 10 min-2 hrs 2-3 hrs 3-10 hrs After 10 hrs
Throttle Position Idle Less than 1/2 throttle Less than 3/4 throttle 3/4 throttle Full throttle available
Speed Approx. 3000 rpm Full throttle run allowed for 1 min. every 10 min. Approx. 4000 rpm. Full throttle run allowed for 2 min. every 10 min.
Note: If your Tohatsu 70/90 hp 3-cylinder outboard is equipped with "oil injection" (automixing of oil/fuel) you should prepare your fuel/oil ratio at 50:1 in the gas tank in addition to using the oil injection feature during the break-in period.
115-140 hp (2-Str) 1-10 min 10 min-2 hrs 2-3 hrs 3-10 hrs After 10 hrs
Throttle Position Idle Less than 1/2 throttle Less than 3/4 throttle 3/4 throttle Full throttle available
Speed Approx. 3000 rpm Full throttle run allowed for 1 min every 10 min Approx. 4000 rpm. Full throttle run allowed for 2 min every 10 min
Note: If your Tohatsu 115/140 hp outboard is equipped with "oil injection" (automixing of oil/fuel) you should prepare your fuel/oil ratio at 50:1 in the gas tank in addition to using the oil injection feature during the break-in period.
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4-Stroke

CAUTION: Tohatsu 4-Stroke Outboards DO NOT come with engine oil already installed. You must add engine oil before attempting to start your 4-stroke outboard for the first time. Failure to do so will result in extensive damage to your outboard. We recommend using Genuine Tohatsu FC-W 4-Cycle Outboard Oil (see our FAQs section for more information). Use unleaded gasoline only (89 octane or above is recommended). After your break-in period has been completed, you should change your lower unit gear case oil.

2 & 3.5 hp (4-Str) 1-10 min 10 min-2 hrs 2-3 hrs 3-10 hrs After 10 hrs
Throttle Position Idle Less than 1/2 throttle Less than 3/4 throttle 3/4 throttle Full throttle available
Speed Approx. 3000 rpm max Full throttle run allowed for 1 min every 10 min Approx. 4000 rpm. Full throttle run allowed for 2 min every 10 min
4-5-6 hp (4-Str) 1-10 min 10 min-2 hrs 2-3 hrs 3-10 hrs After 10 hrs
Throttle Position Idle Less than 1/2 throttle Less than 3/4 throttle 3/4 throttle Full throttle available
Speed Approx. 3000 rpm max Full throttle run allowed for 1 min every 10 min Approx. 4000 rpm. Full throttle run allowed for 2 min every 10 min
Note: This outboard is equipped with an Engine Oil Warning Lamp. When the warning lamp is off, it indicates that sufficient oil pressure is present. If the warning lamp is on (red light is on) or blinking on and off, immediately shut down your outboard and check the oil level. Replenish as needed. If oil level is at the appropriate levels, consult your Tohatsu dealer for assistance. Never run your outboard if the warning lamp is on or blinking on/off.
8-20 hp (4-Str) 1-10 min 10 min-2 hrs 2-3 hrs 3-10 hrs After 10 hrs
Throttle Position Idle Less than 1/2 throttle Less than 3/4 throttle 3/4 throttle Full throttle available
Speed Approx. 3000 rpm max Full throttle run allowed for 1 min every 10 min Approx. 4000 rpm. Full throttle run allowed for 2 min every 10 min
Note: This outboard is equipped with an Engine Oil Warning Lamp. When the warning lamp is off, it indicates that sufficient oil pressure is present. If the warning lamp is on (red light is on) or blinking on and off, immediately shut down your outboard and check the oil level. Replenish as needed. If oil level is at the appropriate levels, consult your Tohatsu dealer for assistance. Never run your outboard if the warning lamp is on or blinking on/off.
25-50 hp (4-Str) 1-10 min 10 min-2 hrs 2-3 hrs 3-10 hrs After 10 hrs
Throttle Position Idle Less than 1/2 throttle Less than 3/4 throttle 3/4 throttle Full throttle available
Speed Approx. 3000 rpm max Full throttle run allowed for 1 min. every 10 min. Approx. 4000 rpm. Full throttle run allowed for 2 min. every 10 min.
Note: This outboard is equipped with an Engine Oil Warning Lamp. When the warning lamp is off, it indicates that sufficient oil pressure is present. If the warning lamp is on (red light is on) or blinking on and off, immediately shut down your outboard and check the oil level. Replenish as needed. If oil level is at the appropriate levels, consult your Tohatsu dealer for assistance. Never run your outboard if the warning lamp is on or blinking on/off.
60-250 hp (4-Str) 1-15 min 15 min-1 hr 1-2 hrs 2-10 hrs After 10 hrs
Throttle Position Idle 10%-30% Throttle 50%-80% Throttle 80%-100% Full throttle available
Speed Trolling Run engine at maximum of 2000-3000 rpm; Vary throttle during this time. Run engine at maximum of 4000-5000 rpm; Vary throttle during this time. Full throttle run allowed for no more than 5 min. at a time.
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TLDI (2-Stroke)

TLDI models are direct fuel injection 2-strokes (no carburetors), therefore, break-in procedures will vary from a standard carbureted 2-stroke outboard.

40-50 hp (TLDI) 1-10 min 10 min-1 hrs 1-2 hrs 2-10 hrs After 10 hrs
Throttle Position Idle Less than 1/2 throttle Less than 3/4 throttle 3/4 throttle Full throttle available
Speed Approx. 3000 rpm Full throttle run allowed for 1 min every 10 min Approx. 4000 rpm. Full throttle run allowed for 2 min every 10 min
Note: Do not mix oil with fuel. TLDI models do not require pre-mixing of oil/fuel during break-in or during normal operation.
70-115 hp (TLDI) 1-10 min 10 min-1 hrs 1-2 hrs 2-10 hrs After 10 hrs
Throttle Position Idle Less than 1/2 throttle Less than 3/4 throttle 3/4 throttle Full throttle available
Speed Approx. 3000 rpm Full throttle run allowed for 1 min every 10 min Approx. 4000 rpm. Full throttle run allowed for 2 min every 10 min
Note: Do not mix oil with fuel. TLDI models do not require pre-mixing of oil/fuel during break-in or during normal operation.